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Application of persulfate in low-temperature atmospheric-pressure plasma jet for enhanced treatment of onychomycosis
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作者 Qunxia ZHANG Cao FANG +1 位作者 Zhu CHEN Qing HUANG 《Plasma Science and Technology》 SCIE EI CAS CSCD 2020年第2期87-94,共8页
Fungal infection of human nails,or onychomycosis,affects 10%of the world's adult population,but current therapies have various drawbacks.In this work,we employed a self-made low-temperature plasma(LTP)device,namel... Fungal infection of human nails,or onychomycosis,affects 10%of the world's adult population,but current therapies have various drawbacks.In this work,we employed a self-made low-temperature plasma(LTP)device,namely,an atmospheric-pressure plasma jet(APPJ)device to treat the nails infected with Trichophyton rubrum(T.rubrum)with the aid of persulfate solution.We found that persulfate solution had a promoting effect on plasma treatment of onychomycosis.With addition of sodium persulfate,the APPJ therapy could cure onychomycosis after several times of treatment.As such,this work has demonstrated a novel and effective approach which makes good use of LTP technique in the treatment of onychomycosis. 展开更多
关键词 low-temperature plasma(LTP) PERSULFATE ONYCHOMYCOSIS Trichophyton rubrum(T rubrum)
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Atmospheric-Pressure DBD Cold Plasma for Preparation of High Active Au/P25 Catalysts for Low-Temperature CO Oxidation 被引量:3
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作者 底兰波 詹志彬 +2 位作者 张秀玲 亓滨 徐伟杰 《Plasma Science and Technology》 SCIE EI CAS CSCD 2016年第5期544-548,共5页
Cold plasma generated by dielectric barrier discharge (DBD) at atmospheric pressure was adopted for preparation of commercial TiO2 Degussa P25 supported Au catalysts (Au/P25- P) with the assistance of the depositi... Cold plasma generated by dielectric barrier discharge (DBD) at atmospheric pressure was adopted for preparation of commercial TiO2 Degussa P25 supported Au catalysts (Au/P25- P) with the assistance of the deposition-precipitation procedure. The influences of the plasma reduction time and calcination on the performance of the Au/P25-P catalysts were investigated. CO oxidation was performed to investigate the catalytic activity of the Au/P25 catalysts. The results show that DBD cold plasma for the fabrication of Au/P25-P catalysts is a fast process, and Au/P25-P (4 min) exhibited the highest CO oxidation activity due to the complete reduction of Au compounds and less consumption of oxygen vacancies. In order to form more oxygen vacancies active species, Au/P25-P was calcined to obtain Au/P25-PC catalysts. Interestingly, Au/P25- PC exhibited the highest activity for CO oxidation among the Au/P25 samples. The results of transmission electron microscopy (TEM) indicated that the smaller size and high distribution of Au nanoparticles are the mean reasons for a high performance of Au/P25-PC. Atmospheric- pressure DBD cold plasma was proved to be of great efficiency in preparing high performance supported Au catalysts. 展开更多
关键词 atmospheric-pressure cold plasma dielectric barrier discharge (DBD) Au TiO2 CO oxidation
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Analyses of nonequilibrium transport in atmospheric-pressure direct-current argon discharge under different modes
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作者 Ziming ZHANG Chuan FANG +2 位作者 Yaoting WANG Lanyue LUO Heping LI 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第11期107-126,共20页
The key plasma parameters under different discharge modes, such as heavy-particle and electron temperatures, electron number density, and nonequilibrium volume of plasmas, play important roles in various applications ... The key plasma parameters under different discharge modes, such as heavy-particle and electron temperatures, electron number density, and nonequilibrium volume of plasmas, play important roles in various applications of gas discharge plasmas. In this study, a self-consistent two-dimensional nonequilibrium fluid model coupled with an external circuit model is established to reveal the mechanisms related to the discharge modes, including the normal glow, abnormal glow,arc, and glow-to-arc transition modes, with an atmospheric-pressure direct-current(DC) argon discharge as a model plasma system. The modeling results show that, under different discharge modes, the most significant difference between the preceding four discharge modes lies in the current and energy transfer processes on the cathode side. On one hand, the current to the cathode surface is mainly delivered by the ions coming from the plasma column under the glow discharge mode due to the low temperature of the solid cathode, whereas the thermionic and secondary electrons emitted from the hot cathode surface play a very important role under the arc mode with a higher cathode surface temperature and higher ion flux toward the cathode. On the other hand, the energy transfer channel on the cathode side changes from mainly heating the solid cathode under the glow mode to simultaneously heating both the solid cathode and plasma column under the arc mode with an increase in the discharge current. Consequently, the power density in the cathode sheath(P_c) was used as a key parameter for judging different discharge modes, and the range of(0.28–1.2) × 10^(12) W m^(-3) was determined as a critical window of P_c corresponding to the glow-to-arc-mode transition for the atmospheric-pressure DC argon discharge, which was also verified by comparison with the experimental results in this study and the data in the previous literature. 展开更多
关键词 atmospheric-pressure plasma direct-current gas discharge discharge mode mode transition power density in cathode sheath
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All-organic modification coating prepared with large-scale atmospheric-pressure plasma for mitigating surface charge accumulation
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作者 张鹏浩 余亮 +4 位作者 贺大钊 唐昕宇 陈硕 董守龙 姚陈果 《Plasma Science and Technology》 SCIE EI CAS CSCD 2023年第8期12-18,共7页
The surface charge accumulation on polymers often leads to surface flashover.Current solutions are mainly based on the introduction of inorganic fillers.The high-cost process and low compatibility remain formidable ch... The surface charge accumulation on polymers often leads to surface flashover.Current solutions are mainly based on the introduction of inorganic fillers.The high-cost process and low compatibility remain formidable challenges.Moreover,existing researches on all-organic insulation focus on capturing electrons,contrary to alleviating charge accumulation.Here,an all-organic modification coating was prepared on polystyrene(PS)with the large-scale atmospheric-pressure plasma,which exhibits outperformed function in mitigating surface charge accumulation.The surface charge dissipation rate and surface conductivity are promoted by about 1.37 and 9.45 times,respectively.Simulation and experimental results show that this all-organic modification coating has a smaller electron affinity potential compared with PS.The decrease of electron affinity potential may result in accelerated surface charge decay of PS,which has never been involved in previous works.Moreover,this coating also has good reliability in a repeated surface flashover.This facile and large-scale approach brings up a novel idea for surface charge regulation and the manufacture of advanced dielectric polymers. 展开更多
关键词 atmospheric-pressure plasma POLYMER surface fiashover surface charge surface modification
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Polyvinyl alcohol–potassium iodide gel probe to monitor the distribution of reactive species generation around atmospheric-pressure plasma jet
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作者 Trung Nguyen TRAN Min HU +6 位作者 Tomohiro OGASAWARA Yuki IWATA Haruka SUZUKI Jin SAKAMOTO Masafumi AKIYOSHI Hirotaka TOYODA Hiroto MATSUURA 《Plasma Science and Technology》 SCIE EI CAS CSCD 2023年第3期78-86,共9页
This study proposes polyvinyl alcohol–potassium iodide(PVA–KI)as a novel gel chemical probe.The probe uses the reactions among PVA,KI,water,borax,and oxidative species to visualize the distribution of reactive speci... This study proposes polyvinyl alcohol–potassium iodide(PVA–KI)as a novel gel chemical probe.The probe uses the reactions among PVA,KI,water,borax,and oxidative species to visualize the distribution of reactive species.This method provides information regarding the distribution of reactive species by coloration on the gel surface.The effects of the surrounding gas phase on the distribution and diffusion of the reactive species are also investigated using the PVA–KI gel probe.Further,the relationship between the irradiation distance and reactive species diffusion is determined on the surface of the PVA–KI probe with and without plastic shielding.Adjusting the irradiation distance appropriately leads to an increase in the modified area as detected by the PVA–KI gel probe analysis.The relative concentration distributions of the reactive species are also obtained from visualized color distributions measured using a colorimeter.Furthermore,reactive species generation by long-scale line plasma is confirmed by the color reaction on the PVA–KI gel surface,with a greater area being covered by an atmospheric-pressure pulsed microwave line plasma source. 展开更多
关键词 atmospheric-pressure plasma jet(APPJ) PVA–KI gel chemical probe argon plasma jets
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Experimental Research of Inactivation Effect of Low-Temperature Plasma on Bacteria 被引量:10
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作者 石兴民 袁育康 +3 位作者 孙岩洲 袁网 彭风玲 邱毓昌 《Plasma Science and Technology》 SCIE EI CAS CSCD 2006年第5期569-572,共4页
The killing logarithms index in killing a vegetative form in an explosure of about 90s and a spore in an explosure of about 120s, by using a low-temperature plasma produced by dielectric barrier discharge (DBD), rea... The killing logarithms index in killing a vegetative form in an explosure of about 90s and a spore in an explosure of about 120s, by using a low-temperature plasma produced by dielectric barrier discharge (DBD), reached 5. The speed in killing the strains tested, by using a low-temperature plasma, was the highest with E. Coli, then S. Aureus and B. Subtilis var niger spore. The results of the scanning electron microscope showed that the low-temperature plasma destroyed the outer structure of the bacteria and that the vegetative form was more susceptible to the inactivation effect of the low-temperature plasma than was the spore. This indicated that the effects of the high voltage and high velocity particle flow, in plasma, penetrating through the outer structure of the bacteria might play a dominant role during the inactivation of the bacteria. 展开更多
关键词 dielectric barrier discharge low-temperature plasma vegetative form SPORE
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Surface Modification of Polypropylene Microporous Membrane by Atmospheric-pressure Plasma Induced N-vinyl-2-pyrrolidone Graft Polymerization 被引量:3
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作者 钟少锋 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2012年第2期301-309,共9页
Membrane surfaces modified with poly(N-vinyl-2-pyrrolidone) (PNVP) can be endowed with hydrophilicity, biocompatibility and functionality. In this work, atmospheric pressure dielectric barrier discharge plasma gra... Membrane surfaces modified with poly(N-vinyl-2-pyrrolidone) (PNVP) can be endowed with hydrophilicity, biocompatibility and functionality. In this work, atmospheric pressure dielectric barrier discharge plasma graft polymerization of N-vinyl-2-pyrrolidone (NVP) onto polypropylene (PP) microporous membrane surface was studied. The experimental results reveal that plasma treatment conditions, such as discharge power, treatment time and adsorbed NVP amount, have remarkable effects on the grafting degree of NVP. Structural and morphological changes on the membrane surfaces were characterized by attenuated total reflection-Fourier transform infrared spectroscopy (FT-IR/ATR), X-ray photoelectron spectroscope (XPS) and field emission scanning electron microscopy (FE-SEM). Water contact angles of the membrane surfaces were also measured by the sessile drop method. Water contact angles on the membrane surfaces decrease with the increase of NVP grafting degree, which indicates an enhanced hydrophilicity for the modified membranes. The effects of grafting degrees on pure water fluxes were also measured. It is shown that pure water fluxes increase with grafting degree firstly and then decrease adversely. Finally, filtration of bovine serum albumin (BSA) solution and platelets adhesion of the PNVP modified membranes show good protein resistance and potential biocompatibility due to the enhancement of surface hydrophilicity. 展开更多
关键词 polypropylene microporous membrane NVP atmospheric-pressure plasma GRAFT ANTIFOULING
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Surface Modification of Polyvinylidene Fluoride (PVDF) Membranes by Low-Temperature Plasma with Grafting Styrene 被引量:3
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作者 陈剑 李继定 陈翠仙 《Plasma Science and Technology》 SCIE EI CAS CSCD 2009年第1期42-47,共6页
In order to control the surface pore sizes of polyvinylidene fluoride membranes and their distribution, low temperature plasma-induced grafting modifications of PVDF were studied to prepare hydrophobe membranes. By ar... In order to control the surface pore sizes of polyvinylidene fluoride membranes and their distribution, low temperature plasma-induced grafting modifications of PVDF were studied to prepare hydrophobe membranes. By argon (Ar) treating and subsequent grafting reaction, a hydrophobe monomer, styrene, was introduced into the PVDF membrane. Fourier transform infrared attenuated total reflection (FTIR-ATR) was utilized to characterize the chemical and physical changes in the Ar plasma modified membrane. The surface modifications of PVDF membranes were investigated by using scanning electron microscopy (SEM), atomic force microscopy (AFM) and differential scanning calorimeter (DSC). The water permeability and the solute rejection were measured by PVDF membrane modified in different graft conditions. Results demonstrated that the pores in the modified membranes get smaller and the distribution of pores gets narrowed with the increase in grafting reaction duration. Longer graft time caused the water flux of PVDF membrane to decrease from 578 kg/(m^2· h) to 23 kg/(m^2· h) and the solute rejection to increase from 73% to 92%. 展开更多
关键词 Ar low-temperature plasma surface grafting STYRENE PVDF membrane
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Study of generation characteristics of glow-type atmospheric-pressure plasma jet based on DC discharge in air 被引量:2
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作者 Wenzheng LIU Qingtian ZHENG +2 位作者 Mingchao HU Luxiang ZHAO Zhiyi LI 《Plasma Science and Technology》 SCIE EI CAS CSCD 2019年第12期40-49,共10页
In order to form an atmospheric-pressure plasma jet without airflow, a needle–ring electrode structure is proposed in this paper. When heteropolar potentials are applied to a needle and a ring, a marked electric fiel... In order to form an atmospheric-pressure plasma jet without airflow, a needle–ring electrode structure is proposed in this paper. When heteropolar potentials are applied to a needle and a ring, a marked electric field strength enhancement around the needle’s pointed end has been found. When the same potential is applied to both the needle and the ring, the lateral electric field strength for the needle can be weakened. By using the above two methods, an increase of the difference between the pointed end electric field strength and the lateral one is achieved and stable plasma jets are formed. A symmetrical space electric field distribution is established at the pointed end of the needles when several sets of heteropolar needle–ring electrodes are uniformly arranged, which is conducive to forming a uniform array plasma jet. Under DC discharge conditions, a safe and stable plasma jet of high density and an array plasma jet are successfully achieved. 展开更多
关键词 DC discharge space electric field atmospheric-pressure air plasma JET array JET
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Partially crystallized Pd nanoparticles decorated TiO_2 prepared by atmospheric-pressure cold plasma and its enhanced photocatalytic performance 被引量:2
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作者 Zhijian Xu Bin Qi +1 位作者 Lanbo Di Xiuling Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第6期679-683,共5页
TiO2 decorated with partially crystallized Pd nanoparticles (Pd/TiO2-P) was successfully prepared by atmospheric-pressure dielectric barrier discharge cold plasma. The XRD and XPS analyses proved that Pd ions were r... TiO2 decorated with partially crystallized Pd nanoparticles (Pd/TiO2-P) was successfully prepared by atmospheric-pressure dielectric barrier discharge cold plasma. The XRD and XPS analyses proved that Pd ions were reduced to partially crystallized metallic Pd nanoparticles in Pd/TiO2-P. The XPS spectra also indicated that an enhanced metal-support interaction was formed due to the existence of partially crystallized Pd nanoparticles with lower coordination number in Pd/TiO2-P. Photocatalytic activity of Pd/TiO2-P was much higher than that of TiO2 samples decorated with well crystallized Pd nanoparticles. 展开更多
关键词 Pd/TiO2 Pd with poor crystallinity PHOTOCATALYSIS atmospheric-pressure cold plasma dielectric barrier discharge
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Low-temperature Plasma Promotes Fibroblast Proliferation in Wound Healing by ROS-activated NF-κB Signaling Pathway 被引量:3
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作者 Xing-min SHI Gui-min XU +6 位作者 Guan-jun ZHANG Jin-ren LIU Yue-ming WU Ling-ge GAO Yang YANG Zheng-shi CHANG Cong-wei YAO 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2018年第1期107-114,共8页
Low-temperature plasma(LTP)has shown great promise in wound healing,although the underlying mechanism remains poorly understood.In the present study,an argon atmospheric pressure plasma jet was employed to treat L929 ... Low-temperature plasma(LTP)has shown great promise in wound healing,although the underlying mechanism remains poorly understood.In the present study,an argon atmospheric pressure plasma jet was employed to treat L929 murine fibroblasts cultured in vitro and skin wounds in BALB/c mice.The in vitro analysis revealed that treatment of fibroblasts with LTP for 15 s resulted in a significant increase in cell proliferation,secretion of epidermal growth factor(EGF)and transforming growth factor-β1(TGF-β1),production of intracellular reactive oxygen species(ROS),and the percentage of cells in S phase,protein expression of phosphorylated p65(P-p65)and cyclin D1,but a noted decrease in the protein expression of inhibitor kappa B(IκB).The in vivo experiments demonstrated that 30-s LTP treatment enhanced the number of fibroblasts and the ability of collagen synthesis,while 50-s treatment led to the opposite outcomes.These results suggested that LTP treatment promotes the fibroblast proliferation in wound healing by inducing the generation of ROS,upregulating the expression of P-p65,downregulating the expression of IκB,and activating the NF-κB signaling pathway and consequently altering cell cycle progression(increased DNA synthesis in S phage). 展开更多
关键词 low-temperature plasma fibroblast proliferation NF-κB signaling pathway cell cycle reactive oxygen species
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Tuning Effect of N_2 on Atmospheric-Pressure Cold Plasma CVD of TiO_2 Photocatalytic Films 被引量:2
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作者 底兰波 李小松 +3 位作者 赵天亮 常大磊 刘倩倩 朱爱民 《Plasma Science and Technology》 SCIE EI CAS CSCD 2013年第1期64-69,共6页
To deposit TiO2 films through plasma CVD, the partial pressure ratio of O2 to TIC14 should be greater than the stoichiometric ratio (PO2/PTiCl4 〉 1). However, this may lead to the formation of powder instead of fil... To deposit TiO2 films through plasma CVD, the partial pressure ratio of O2 to TIC14 should be greater than the stoichiometric ratio (PO2/PTiCl4 〉 1). However, this may lead to the formation of powder instead of film on the substrate when using volume dielectric barrier discharge (volume-DBD) at atmospheric pressure. In this study, by adding N2 into the working gas Ar, TiO2 photocatalytic films were successfully fabricated in the presence of excess O2 (PO2/PTiC14 = 2.6) by using a wire-to-plate atmospheric-pressure volume-DBD. The tuning effect of N2 on the deposition of TiO2 film was studied in detail. The results showed that by increasing the N2 content, the deposition rate and particle size of the TiO2 film were reduced, and its photocatalytic activity was enhanced. The tuning mechanism of N2 is further discussed. 展开更多
关键词 plasma CVD TiO2 photocatalytic films atmospheric-pressure cold plasma dielectric barrier discharge (DBD) optical emission spectra (OES)
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Design and characteristics investigation of a miniature low-temperature plasma spark discharge device 被引量:1
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作者 Xue LI Renwu ZHOU +2 位作者 Bo ZHANG Rusen ZHOU Zhi FANG 《Plasma Science and Technology》 SCIE EI CAS CSCD 2019年第5期43-50,共8页
Atmospheric pressure low-temperature plasma is a promising tool in biomedicine applications including blood coagulation,bacterial inactivation,sterilization,and cancer treatment,due to its high chemical activity and l... Atmospheric pressure low-temperature plasma is a promising tool in biomedicine applications including blood coagulation,bacterial inactivation,sterilization,and cancer treatment,due to its high chemical activity and limited thermal damage.It is of great importance to develop portable plasma sources that are safe to human touch and suitable for outdoor and household operation.In this work,a portable and rechargeable low-temperature plasma spark discharge device(130 mm×80 mm×35 mm,300 g)was designed.The discharge frequency and plume length were optimized by the selection of resistance,capacitance,electrode gap,and ground electrode aperture.Results show that the spark plasma plume is generated with a length of 12 mm and a frequency of 10 Hz at a capacitance of 0.33μF.resistance of 1 MΩ,electrode gap of 2 mm,and ground electrode aperture of 1.5 mm.Biological tests indicate that the plasma produced by this device contains abundant reactive species,which can be applied in plasma biomedicine,including daily sterilization and wound healing. 展开更多
关键词 low-temperature plasma SPARK DISCHARGE portable plasma source plasma MEDICINE
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Super-hydrophobic film deposition by an atmospheric-pressure plasma process and its anti-icing characteristics 被引量:1
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作者 Qinghua HUANG Lin XIONG +5 位作者 Xiaolong DENG Zhan SHU Qiang CHEN Bing BAO Mingli CHEN Qing XIONG 《Plasma Science and Technology》 SCIE EI CAS CSCD 2019年第5期142-150,共9页
In this work,the super-hydrophobic(SH)surface was prepared through chemical vapor deposition process by an argon atmospheric pressure plasma jet source with HMDSN(hexamethyldisilazane)as the polymerization precursor.P... In this work,the super-hydrophobic(SH)surface was prepared through chemical vapor deposition process by an argon atmospheric pressure plasma jet source with HMDSN(hexamethyldisilazane)as the polymerization precursor.Plasma synthesized organosilicon(SiOxCyHz)thin films with water contact angle over 160°and sliding angle below 5°,were able to be achieved.FTIR and XPS analysis indicates a large number of hydrocarbon compositions were polymerized in the thin films enduing the latter very-low surface free energy.SEM shows the SH films display micro-nanostructure and with high degree of averaged surface roughness 190 nm evaluated by AFM analysis.From experiments under controlled low-temperature and moisture conditions,the prepared SH surface exhibits good anti-icing effects.Significantly prolonging freezing time was achievable on the SH thin films for both static and sliding water droplets.This investigation demonstrates the anti-icing potentials of SH surface prepared through low-cost simple atmospheric-pressure plasma polymerization process. 展开更多
关键词 HYDROPHOBICITY ANTI-ICING atmospheric-pressure plasma POLYMERIZATION
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Low-Temperature Plasma Induced Grafting of 2-Methacryloyloxyethyl Phosphorylcholine onto Poly(tetrafluoroethylene) Films 被引量:2
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作者 赵蕴慧 王芬 何祥鹏 《Transactions of Tianjin University》 EI CAS 2009年第5期355-359,共5页
Modification of poly(tetrafluoroethylene)(PTFE) films with 2-methacryloyloxyethyl phosphorylcholine(MPC) was performed by low-temperature plasma treatment and grafting polymerization.Surface properties of PTFE were ch... Modification of poly(tetrafluoroethylene)(PTFE) films with 2-methacryloyloxyethyl phosphorylcholine(MPC) was performed by low-temperature plasma treatment and grafting polymerization.Surface properties of PTFE were characterized by attenuated total reflectance Fourier transform infrared(ATR-FTIR) spectra,X-ray photoelectron spectroscopy(XPS) ,and static contact angle.The results show that MPC has been grafted onto PTFE film surface successfully.Contact angle for the modified PTFE films in the water decreased from 108°to 58.25°,while surface energy increased from 17.52 mN/m to 45.47 mN/m.The effects of plasma treatment time,monomer concentration and grafting time on degree of grafting were determined.In the meanwhile,blood compatibility of the PTFE films was studied by checking thrombogenic time of blood plasma. 展开更多
关键词 low-temperature plasma poly(tetrafluoroethylene) (PTFE) GRAFTING 2-methacryloyloxyethyl phosphorylcholine (MPC)
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Sensitivity of two drug-resistant bacteria to low-temperature air plasma in catheterassociated urinary tract infections under different environments 被引量:1
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作者 Yuanyuan HE Chengbiao DING +5 位作者 Tao JIN Yueyao FAN Zhengwei WU Mengwen SUN Kun WANG Tuo JI 《Plasma Science and Technology》 SCIE EI CAS CSCD 2020年第6期137-143,共7页
The high incidence of catheter-associated urinary tract infections,which are dominated by drugresistant bacteria,has attracted an increasing number of researchers interested in solving this public health problem.The p... The high incidence of catheter-associated urinary tract infections,which are dominated by drugresistant bacteria,has attracted an increasing number of researchers interested in solving this public health problem.The purpose of this study was to explore the killing effect of lowtemperature air plasma(LTAP)on extended-spectrum beta-lactamase-producing Escherichia coli and high level gentamycin resistance enterococci under two simulated environments in vitro.The results showed that the survival rate of these two kinds of bacteria decreased to less than20%after being treated by LTAP in different environments for 5 min.A comparison of the LTAP treatments showed that the killing efficacy of the two kinds of bacteria in the early stage(0-1 min)was up to 50%.Moreover,the results of transmission electron microscopy,reactive nitrogen species measurement,and a temperature test indicated that the bactericidal effect of the LTAP treatment on the two kinds of bacteria worked through the destruction of the ribosome and other organelles inside the bacteria,rather than the thermal effect,to achieve sterilization. 展开更多
关键词 CAUTI low-temperature air plasma ANTIBACTERIAL transmission electron microscopy
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Destruction of Gaseous Styrene with a Low-Temperature Plasma Induced by a Tubular Multilayer Dielectric Barrier Discharge 被引量:3
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作者 张家辉 刘娟娟 +3 位作者 张仁熙 侯惠奇 陈善平 张益 《Plasma Science and Technology》 SCIE EI CAS CSCD 2015年第1期50-55,共6页
The destruction of gaseous styrene was studied using a low-temperature plasma induced by tubular multilayer dielectric barrier discharge(DBD).The results indicate that the applied voltage,gas flow rate,inlet styrene... The destruction of gaseous styrene was studied using a low-temperature plasma induced by tubular multilayer dielectric barrier discharge(DBD).The results indicate that the applied voltage,gas flow rate,inlet styrene concentration and reactor configuration play important roles in styrene removal efficiency (ηstyrene) and energy yield(EY).Values of ηstyrene and EY reached 96%and 15567 mg/kWh when the applied voltage,gas flow rate,inlet styrene concentration and layers of quartz tubes were set at 10.8 kV,5.0 m/s,229 mg/m^3 and 5 layers,respectively.A qualitative analysis of the byproducts and a detailed discussion of the reaction mechanism are also presented.The results could facilitate industrial applications of the new DBD reactor for waste gas treatment. 展开更多
关键词 low-temperature plasma styrene dielectric barrier discharge(DBD)
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Remove of Phenolic Compounds in Water by Low-Temperature Plasma: A Review of Current Research 被引量:1
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作者 Jufang ZHANG Jierong CHEN Xiaoyong LI 《Journal of Water Resource and Protection》 2009年第2期99-109,共11页
Phenolic compounds have very strong toxicity, so it has been paid sharply attention to find an effective way of controlling the wastewater containing phenolic compounds. The work on this subject done by domestic and o... Phenolic compounds have very strong toxicity, so it has been paid sharply attention to find an effective way of controlling the wastewater containing phenolic compounds. The work on this subject done by domestic and overseas scholars is studied in this paper, and the progress of researches on low-temperature plasma treatment is summarized through the electrical discharge types, mechanism, kinetics of phenolic compounds decomposition and combination of several methods with low-temperature plasma treatment. In addition, the crucial problem and the developing tendency on low-temperature plasma treatment for phenol-bearing wastewater are briefly discussed. 展开更多
关键词 low-temperature plasma Treatment PHENOLIC COMPOUNDS Types of Electrical DISCHARGE Mechanism Kinetics Combination of SEVERAL Methods
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Dielectric barrier discharge plasma-assisted catalytic ammonia synthesis:synergistic effect of Ni-MOF-74 catalyst and nanosecond pulsed plasma
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作者 徐晓芳 孙萌 +4 位作者 宋勤龙 吴璇 陈冲冲 陈强 张海宝 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第6期40-49,共10页
Ammonia is one of the most important chemical raw materials in both manufacture and life of human.Traditionally Haber-Bosch method for ammonia synthesis involves high temperature and high pressure conditions,leading t... Ammonia is one of the most important chemical raw materials in both manufacture and life of human.Traditionally Haber-Bosch method for ammonia synthesis involves high temperature and high pressure conditions,leading to significant energy consumption and environmental pollution.Non-thermal plasma(NTP) is a promising alternative approach to ammonia synthesis at low temperature and atmospheric pressure.In this study,the synergistic effect of nanosecond pulsed dielectric barrier discharge(np-DBD) and Ni-MOF-74 catalyst was investigated in ammonia synthesis by utilizing nitrogen and hydrogen as feedstock.The results demonstrated that the plasma catalytic-synthesis process parameters play a crucial role in the synthesis process of ammonia.The highest ammonia synthesis rate of 5145.16 μmol·g^(-1)·h^(-1)with an energy efficiency of 1.27 g·kWh^(-1)was observed in the presence of the Ni-MOF-74 catalyst,which was3.7 times higher than that without Ni-MOF-74 catalyst.The synergistic effect of Ni-MOF-74catalyst and nanosecond pulsed plasma was explored by in-situ plasma discharge diagnostics. 展开更多
关键词 AMMONIA SYNTHESIS low-temperature plasma nanosecond pulsed power source Ni-MOF-74
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Evaluation of the intraoperative trauma degree and postoperative speech function of low-temperature plasma radiofrequency surgery treatment of children with OSAHS 被引量:1
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作者 He Liu Liang Ma Zhong-Wu Sun 《Journal of Hainan Medical University》 2017年第9期70-74,共5页
Objective:To evaluate the intraoperative trauma degree and postoperative speech function of low-temperature plasma radiofrequency surgery treatment of children with obstructive sleep apnea hypopnea syndrome (OSAHS).Me... Objective:To evaluate the intraoperative trauma degree and postoperative speech function of low-temperature plasma radiofrequency surgery treatment of children with obstructive sleep apnea hypopnea syndrome (OSAHS).Methods: A total of 118 children with OSAHS were divided into the control group (n=59) who received general surgery and the observation group (n=59) who received the low-temperature plasma radiofrequency surgery according to the random number table. Before operation and 24 h after operation, serum levels of stress hormones, acute phase proteins and inflammatory markers of two groups of children were determined, and the speech function parameter levels were assessed.Results:Before operation, differences in serum contents of stress hormones, acute phase proteins and inflammatory factors as well as speech function parameter levels were not statistically significant between two groups of patients. 24 h after operation, serum stress hormones adrenocorticotropic hormone (ACTH), angiotensin-2 (Ang-2), norepinephrine (NE), cortisol (Cor) contents of observation group were lower than those of control group, serum acute phase proteins haptoglobin (HP), ceruloplasmin (CER), and prealbumin (PA) contents were lower than those of control group, and serum inflammatory factors interleukin-1 (IL-1), interleukin-4 (IL-4), interleukin-27 (IL-27), tumor necrosis factorα(TNF-α) contents were lower than those of control group;speech function parameters NNE and NHR levels of observation group were higher than those of control group.Conclusion:Compared with routine surgery, low-temperature plasma radiofrequency surgery treatment of children with OSAHS causes less surgical trauma and more greatly improves the postoperative speech level. 展开更多
关键词 OBSTRUCTIVE sleep apnea-hypopnea syndrome low-temperature plasma radiofrequency TRAUMA DEGREE Speech function
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