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Synthesis of Multi-Walled Carbon Nanotubes/ZnO Nanocomposites Using Absorbent Cotton
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作者 Jiao Qu Chunqiu Luo Qiao Cong 《Nano-Micro Letters》 SCIE EI CAS 2011年第2期115-120,共6页
This letter focuses on the synthesis of multi-walled carbon nanotubes(MWNTs) and MWNTs/ZnO nanocomposites using absorbent cotton.The MWNTs have been synthesized by a rapid heating of absorbent cotton at different temp... This letter focuses on the synthesis of multi-walled carbon nanotubes(MWNTs) and MWNTs/ZnO nanocomposites using absorbent cotton.The MWNTs have been synthesized by a rapid heating of absorbent cotton at different temperature(400,550,600).The MWNTs/ZnO nanocomposites have been synthesized by heating mixtures of Zn(OH)_2/H_2O/absorbent cotton at different temperature(at about 550 and600).The X-ray diffraction(XRD) pattern and energy dispersive spectrum(EDS) clearly show that the pure MWNTs and ZnO nanocomposites(with a mean size of 35.9 nm) were synthesized.The scanning electron microscopy(SEM) images demonstrate that the structure of synthesized MWNTs was middle-hollow,with inner and outer diameter of around 10 and 80 nm.The ZnO nanocomposites that had grown on the walls of MWNTs were nonuniform and agglomerated,with an outer diameter of around 110 nm.The selected area diffraction(SAD) patterns and Raman spectrum indicate that the MWNTs were well-crystallised,and there are a few defects in the walls.Infrared absorption spectroscopy(IR) spectra suggest that the surface of MWNTs has been covered by ZnO. 展开更多
关键词 mwnt mwnts/zno nanocomposites CHARACTERISTIC
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Enhanced Photocatalytic Activity of ZnO/CuO Nanocomposites Synthesized by Hydrothermal Method 被引量:5
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作者 Tongqin Chang Zijiong Li +2 位作者 Gaoqian Yun Yong Jia Hongjun Yang 《Nano-Micro Letters》 SCIE EI CAS 2013年第3期163-168,共6页
In this paper, we have demonstrated a facile and low-cost synthesis of the ZnO/CuO nanocomposites by two-step hydrothermal methods. The photocatalytic properties of the as-synthesized ZnO/CuO nanocomposites have been ... In this paper, we have demonstrated a facile and low-cost synthesis of the ZnO/CuO nanocomposites by two-step hydrothermal methods. The photocatalytic properties of the as-synthesized ZnO/CuO nanocomposites have been evaluated by the photodegradation of methylene blue(MB) and methyleneorange(MO) under UV irradiation. Experimental results show that MB and MO can be degraded completely within 15 and 25 min by the ZnO/CuO nanocomposites and its photodegradation rate is 6 times faster than that of pure ZnO. This enhanced photocatalytic activity can be ascribed to the low recombination probability of photo-induced carriers due to the efficient charge transfer in the nanocomposites. The as-synthesized ZnO/CuO nanocomposite may be a promising candidate for dye photodegradation of wastewaters. 展开更多
关键词 Photocatalytic degradation nanocomposites zno/CuO HYDROTHERMAL
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Photoluminescence behavior and visible light photocatalytic activity of ZnO,ZnO/ZnS and ZnO/ZnS/α-Fe_2O_3 nanocomposites 被引量:5
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作者 Gaurav HITKARI Sandhya SINGH Gajanan PANDEY 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2018年第7期1387-1397,共11页
In order to achieve effective, economic, and easily achievable photocatalyst for the degradation of dye methyl orange(MeO), ZnO, ZnO/ZnS and ZnO/ZnS/α-Fe2O3 nanocomposites were prepared by simple chemical synthetic... In order to achieve effective, economic, and easily achievable photocatalyst for the degradation of dye methyl orange(MeO), ZnO, ZnO/ZnS and ZnO/ZnS/α-Fe2O3 nanocomposites were prepared by simple chemical synthetic route in the aqueous medium. Phase, crystallinity, surface structure and surface behavior of the synthesized materials were determined by X-ray diffraction(XRD) and Brunauer-Emmett-Teller analysis(BET) techniques. XRD study established formation of good crystalline ZnO, ZnO/ZnS and ZnO/ZnS/α-Fe2O3 nanomaterials. By using intensity of constituent peaks in the XRD pattern, the compositions of nanocomposites were determined. From the BET analysis, the prepared materials show mesoporous behavior, type Ⅳ curves along with H4 hysteresis. The ZnO/ZnS/α-Fe2O3 composite shows the largest surface area among three materials. From the UV-visible spectra, the band gap energy of the materials was determined. Photoluminescence spectra(PL) were used to determine the emission behavior and surface defects in the materials. In PL spectra, the intensity of UV peak of ZnO/ZnS is lowered than that of ZnO while in case of ZnO/ZnS/α-Fe2O3, the intensity further decreased. The visible emission spectra of ZnO/ZnS increased compared with ZnO while in ZnO/ZnS/α-Fe2O3 it is further increased compared with ZnO/ZnS. The as-synthesized materials were used as photocatalysts for the degradation of dye MeO. The photo-degradation data revealed that the ZnO/ZnS/α-Fe2O3 is the best photocatalyst among three specimens for the degradation of dye MeO. The decrease of intensity of UV emission peak and the increase of intensity of visible emission cause the decrease of recombination of electrons and holes which are ultimately responsible for the highest photocatalytic activity of ZnO/ZnS/α-Fe2O3. 展开更多
关键词 nanocomposite zno ZNS Α-FE2O3 CALCINATION optical properties photocatalytic activity
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Synthesis, characterization and antimicrobial activity of alkaline ion-exchanged ZnO/bentonite nanocomposites 被引量:1
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作者 Hamideh Pouraboulghasem Mohammad Ghorbanpour +1 位作者 Razieh Shayegh Samaneh Lotfiman 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第4期787-792,共6页
Nanocomposites of zinc/bentonite clay were synthesized for use as an antibacterial material by a quick and simple alkaline ion exchange method. The synthesis of zinc doped bentonite nanocomposite was accomplished by p... Nanocomposites of zinc/bentonite clay were synthesized for use as an antibacterial material by a quick and simple alkaline ion exchange method. The synthesis of zinc doped bentonite nanocomposite was accomplished by placing bentonite in a melting bath of ZnSO4 for 10, 20, 40, 60 and 90 rain. The complexes were characterized by XRD, SEM and DRS. XRD analyses and SEM observations confirmed the diffusion of zinc to the clay surfaces. Antibacterial activity tests against Escherichia coli showed that bentonite did not present any antibacterial properties, but after alkaline ion exchange treatment, inhibition was noted. The highest antibacterial activity was observed with ZnO/bentonite composite alkaline ion exchange for 60 and 90 rain. Interestingly, the leaching test indicated that ZnO/bentonite did not present any risk for drinking water treatment. 展开更多
关键词 alkaline ion exchange zno/bentonite nanocomposite antibacterial activity
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Bio-capped and green synthesis of ZnO/g-C_(3)N_(4) nanocomposites and its improved antibiotic and photocatalytic activities: An exceptional approach towards environmental remediation 被引量:2
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作者 Iltaf Khan Chunjuan Wang +7 位作者 Shoaib Khan Jinyin Chen Aftab Khan Sayyar Ali Shah Aihua Yuan Sohail Khan Mehwish KButt Humaira Asghar 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第4期215-224,共10页
In this research study, we have synthesized the bio-capped ZnO/g-C_(3)N_(4) nanocomposites by employing lemon juice(Citrus limon) as a stabilizer and mediator. Fruitfully, lemon juice which contains various acidic fun... In this research study, we have synthesized the bio-capped ZnO/g-C_(3)N_(4) nanocomposites by employing lemon juice(Citrus limon) as a stabilizer and mediator. Fruitfully, lemon juice which contains various acidic functional groups and citric acid has the capability to block the surface of g-C_(3)N_(4) from chemical reactivity and activated the surface of g-C_(3)N_(4) for various reactions. Consequently, the agglomeration behavior and controlled shape of g-C_(3)N_(4) has also been achieved. Our experimental results i.e. XRD,TEM, HRTEM, PL, FS, XPS, and PEC have confirmed that the lemon juice mediated and green g-C_(3)N_(4)(L-CN) have good performances and remarkable visible light photocatalytic activities as compared to the chemically synthesized g-C_(3)N_(4)(CN). Furthermore, the small surface area and low charge separation of g-C_(3)N_(4) is upgraded by coupling with Zn O nanoparticles. It is proved that the coupling of Zn O worked as a facilitator and photoelectron modulator to enhance the charge separation of g-C_(3)N_(4). Compared to pristine lemon-mediated green g-C_(3)N_(4)(L-CN), the most active sample 5Zn O/L-CN showed ~ 5-fold improvement in activities for ciprofloxacin(CIP) and methylene blue(MB) degradation. More specifically,the mineralization process and degradation pathways, and the mineralization process of ciprofloxacin(CIP) and methylene blue(MB) are suggested. Finally, our present novel research work will provide new access to synthesize the eco-friendly and bio-caped green g-C_(3)N_(4)nanomaterials and their employment for pollutants degradation and environmental purification. 展开更多
关键词 Bio-caped green g-C_(3)N_(4) Lemon juice mediators zno/g-C_(3)N_(4)nanocomposite Environmental remediation Degradation pathways
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Zn ^(2+) Release Performance in Simulated Uterine Solution and Surface Characteristics of ZnO/LDPE Nanocomposites
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作者 杨志红 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2005年第B12期44-47,共4页
Zinc oxide/low-density polyethylene (LDPE) nanocomposites were prepared for intrauterine devices. The change of Zn^2+ release rates of nanocomposites ( doped with various mass fractions of zinc oxide nanoparticles... Zinc oxide/low-density polyethylene (LDPE) nanocomposites were prepared for intrauterine devices. The change of Zn^2+ release rates of nanocomposites ( doped with various mass fractions of zinc oxide nanoparticles between 5wt% and 65 wt% ) for 264 days in a simulated uterine solution were investigated. The resuits show that initial burst phases are followed by near zero-order release phases. SEM technique was employed to observe the surface morphology of the 45wt% ZnO/ LDPE composite. Elements and phases on the surface of the nanocomposite after incubation were also analyzed by EDX and XRD respectively. The experimental results show that incrustation formation does not occur after incubation. 展开更多
关键词 IUDs zno / LDPE nanocomposite Zn^2+ release rate incrustation formation
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Silica encapsulated ZnO quantum dot-phosphor nanocomposites:Sol-gel preparation and white light-emitting device application
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作者 Ya-Chuan Liang Kai-Kai Liu +2 位作者 Ying-Jie Lu Qi Zhao Chong-Xin Shan 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第7期548-555,共8页
ZnO quantum dots (QDs) as an eco-friendly and low-cost material has bright fluorescence, which makes it promising material for healthy lighting and displaying. However, the low fluorescence efficiency and poor stabi... ZnO quantum dots (QDs) as an eco-friendly and low-cost material has bright fluorescence, which makes it promising material for healthy lighting and displaying. However, the low fluorescence efficiency and poor stability of ZnO QDs impede their applications in lighting application. In this work, silica encapsulated ZnO QD-phosphors nanocomposites (ZSPN) have been prepared through a sol-gel synthesis process, where yellow-emitting ZnO QDs and blue-emitting BaMgAl10O17:Eu2+ are employed as the luminescence cores and silica as link between two luminescence materials. Tunable photoluminescence of ZSPN and the white light emission have been achieved through changing mass ratio of both of ZnO QDs and commercial phosphors. The PLQY of the ZSPN can reach 63.7% and they can maintain high luminous in- tensity even the ambient temperature up to 110 ℃ and after 35 h of UV irradiation. In addition, they can keep stable for 40 days. By coating the ZSPN phosphors onto a ultraviolet chip, WLEDs with luminous efficiency of 73.6 lm/W and the color coordinate, correlated color temperature, and color rendering index can reach (0.32, 0.34), 5580 K, and 87, respectively, indicating the bright prospect of the ZSPN phosphors used in healthy lighting. 展开更多
关键词 zno QD-phosphors nanocomposites (ZSPN) PHOSPHORS light-emitting diodes
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Fabrication and electrochemical performance of graphene-ZnO nanocomposites
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作者 李振鹏 门传玲 +1 位作者 王婉 曹军 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第5期499-504,共6页
Graphene-ZnO nanocomposites were synthesized successfully through a one-step solvothermal approach. The mor-phology, structure, and composition of the prepared nanocomposites were investigated by scanning electron mic... Graphene-ZnO nanocomposites were synthesized successfully through a one-step solvothermal approach. The mor-phology, structure, and composition of the prepared nanocomposites were investigated by scanning electron microscopy (SEM), transmission electron microscope (TEM), laser micro Raman spectroscopy, and Fourier transform infra-red spec-troscopy (FT-IR). The outcomes confirmed that this approach is comparatively steady, practicable, and operable compared with other reported methods. The electrochemical performance of the graphene-ZnO electrodes was analyzed through cyclic voltammetry, altering-current (AC) impedance, and chronopotentiometry tests. The graphene-ZnO electrodes exhib-ited an improved electrode performance with higher specific capacitance (115 F·g^-1 ), higher electrochemical stability, and higher energy density than the graphene electrodes and most reported graphene-ZnO electrodes. Graphene-ZnO nanocom-posites have a steady reversible charge/discharge behavior, which makes them promising candidates for electrochemical capacitors (ECs). 展开更多
关键词 graphene-zno nanocomposites electrochemical performance electrochemical capacitors
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Selective Removal of Photocatalytically Active Anatase TiO_(2)Phase from Mixed-Phase TiO_(2)-ZnO Nanocomposites:Impact on Physicochemical Properties and Photocatalytic Activity
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作者 Nambath Gayathri Menon Sankara Sarma V.Tatiparti Suparna Mukherji 《Energy & Environmental Materials》 SCIE 2020年第4期548-559,共12页
TiO_(2)-ZnO nanocomposites were synthesized by varying Ti:Zn molar ratio from 1:0.1(TZ-1:0.1)to 1:1(TZ-1:1).With increase in Zn content,from TZ-1:0.1 to TZ-1:0.2,anatase transformed to rutile phase.TZ-1:0.3,which cont... TiO_(2)-ZnO nanocomposites were synthesized by varying Ti:Zn molar ratio from 1:0.1(TZ-1:0.1)to 1:1(TZ-1:1).With increase in Zn content,from TZ-1:0.1 to TZ-1:0.2,anatase transformed to rutile phase.TZ-1:0.3,which contained a blend of phases,including rutile and anatase TiO_(2),ZnO,and zinc titanates,exhibited the narrowest bandgap(2.5±0.1 e V),and showed the highest photocatalytic activity.TZ-1:1 was predominated by zinc titanates.All the nanocomposites exhibited narrower bandgaps compared to pure TiO_(2)nanoparticles,facilitating visible light activity.This study was designed to explore whether a method targeting the removal of a specific crystalline phase(anatase)influenced the properties and photocatalytic activity of the nanocomposite.Selective dissolution not only removed anatase phase,but also led to significant loss of crystallinity,widened the bandgap,and adversely affected photocatalytic performance,in nanocomposites that contained>80%anatase phase(TZ-1:0.1 and TZ-1:0.2).However,in nanocomposites that contained less of anatase phase(TZ-1:0.3and TZ-1:1),the morphology,bandgap,crystallinity,and the extent of photocatalytic activity at the end of 240 min remained largely unaffected.Photocatalytic activity in TZ-1:0.3 and TZ-1:1 originated from a blend of phases comprising of less photocatalytically active phases,such as rutile TiO_(2),Zn TiO3,and Zn2TiO4,rather than from the anatase phase.The Ti:Zn molar ratio controlled the phases present in TiO_(2)-ZnO nanocomposites,which,in turn,controlled the physicochemical properties and visible light activity.Thus,in nanocomposites that contained a mix of several phases,the properties and photocatalytic activity were not dependent on anatase phase. 展开更多
关键词 anatase TiO_(2) TiO_(2)–zno nanocomposites Visible light photocatalysis
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MWNTs-OH/PET纳米复合材料的燃烧性能与阻燃机理研究 被引量:16
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作者 张建军 张靖宗 +2 位作者 纪全 夏延致 孔庆山 《功能材料》 EI CAS CSCD 北大核心 2010年第3期394-396,400,共4页
用原位聚合方法制备了纯PET和MWNTs-OH/PET纳米复合材料,用锥形量热仪测试了4种样品的燃烧性能,用场发射扫描电镜表征了纳米复合材料的微观机构。对比分析了4种样品的燃烧性能、烟及毒气释放量。结果表明复合材料的热释放速率(HRR)峰值... 用原位聚合方法制备了纯PET和MWNTs-OH/PET纳米复合材料,用锥形量热仪测试了4种样品的燃烧性能,用场发射扫描电镜表征了纳米复合材料的微观机构。对比分析了4种样品的燃烧性能、烟及毒气释放量。结果表明复合材料的热释放速率(HRR)峰值及平均值,总放热量(THR)和有效燃烧热(EHC)平均值都有所降低,纳米复合材料的CO生成速率峰值较平缓且低于纯PET的CO生成速率,没有增加PET材料的毒性。从扫描电镜图和锥形量热仪测试结果可以初步断定,MWNTs-OH/PET纳米复合材料属于气相阻燃和凝固相阻燃机理。 展开更多
关键词 多壁碳纳米管 聚对苯二甲酸乙二酯 纳米复合材料 阻燃机理 扫描电镜
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RGO-MWNTs/铁氰化镍复合材料构筑无酶葡萄糖传感器 被引量:3
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作者 莫韬 黄富英 +1 位作者 陈国良 李艳彩 《湖北民族学院学报(自然科学版)》 CAS 2015年第4期453-456,477,共5页
将制备的铁氰化镍纳米颗粒(Ni HCF)与石墨烯-碳纳米管(RGO-MWNTs)混合,分散于壳聚糖(Chit)溶液中,形成新的纳米复合材料(RGO-MWNTs/Ni HCF/Chit),将其修饰在玻碳电极表面.由于RGO-MWNTs具有良好的电子传递性能和Ni HCF与RGO-MWNTs之间... 将制备的铁氰化镍纳米颗粒(Ni HCF)与石墨烯-碳纳米管(RGO-MWNTs)混合,分散于壳聚糖(Chit)溶液中,形成新的纳米复合材料(RGO-MWNTs/Ni HCF/Chit),将其修饰在玻碳电极表面.由于RGO-MWNTs具有良好的电子传递性能和Ni HCF与RGO-MWNTs之间的协同作用,促使Ni HCF电催化氧化能力有了很大的提高.与Ni HCF/Chit膜相比,RGO-MWNTs/Ni HCF/Chit复合膜的氧化还原峰电流增大了5倍,且在较低电位下对葡萄糖具有很好的电催化性能.该复合膜电极对葡萄糖的线性响应范围为0.03~0.096 m M,检测限为0.016 m M,可用于葡萄糖的电化学传感检测. 展开更多
关键词 铁氰化镍纳米颗粒 石墨烯/碳纳米管复合材料 壳聚糖 葡萄糖传感器
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MoS_(2)/ZnO异质结纳米材料降解亚甲基蓝的光催化性能研究 被引量:1
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作者 王进美 蒋守杰 +2 位作者 王春霞 王丽丽 高大伟 《西安工程大学学报》 CAS 2024年第1期24-30,共7页
为了提高ZnO的光转换效率,选用带隙较低的MoS_(2)形成异质结提高ZnO的光催化性能。通过水热法制备ZnO纳米棒,并进一步制备MoS_(2)/ZnO异质结构的纳米复合材料。通过扫描电镜(SEM)、X射线粉末衍射仪(XRD)、固体紫外可见漫反射测试仪(UV-V... 为了提高ZnO的光转换效率,选用带隙较低的MoS_(2)形成异质结提高ZnO的光催化性能。通过水热法制备ZnO纳米棒,并进一步制备MoS_(2)/ZnO异质结构的纳米复合材料。通过扫描电镜(SEM)、X射线粉末衍射仪(XRD)、固体紫外可见漫反射测试仪(UV-Vis)和紫外可见分光光度计(UV-245)等分析方法对样品的形貌、结构及光学性能等进行表征。结果表明,MoS_(2)/ZnO异质结复合材料呈棒状结构,并由于内建电场存在可有效增强光生载流子的分离效率,进而提高了可见光区的吸收,提高了光催化性能。在模拟太阳光(包含紫外波段)下,60 min时MoS_(2)-15/ZnO纳米复合材料对亚甲基蓝的降解率可达99%,比纯ZnO的降解率提高了10%。 展开更多
关键词 MoS_(2)/zno 光催化 异质结 亚甲基蓝 纳米复合材料
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Synthesis of a PEBAX-1074/ZnO nanocomposite membrane with improved CO_2 separation performance 被引量:6
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作者 Navid Azizi Toraj Mohammadi Reza Mosayebi Behbahani 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2017年第3期454-465,共12页
In this investigation, polymeric nanocomposite membranes(PNMs) were prepared via incorporating zinc oxide(ZnO) into poly(ether-block-amide)(PEBAX-1074) polymer matrix with different loadings. The neat membrane a... In this investigation, polymeric nanocomposite membranes(PNMs) were prepared via incorporating zinc oxide(ZnO) into poly(ether-block-amide)(PEBAX-1074) polymer matrix with different loadings. The neat membrane and nanocomposite membranes were prepared via solution casting and solution blending methods, respectively. The fabricated membranes were characterized by field emission scanning electron microscopy(FESEM) to survey cross-sectional morphologies and thermal gravimetric analysis(TGA)to study thermal stability. Fourier transform infrared(FT-IR) and X-ray diffraction(XRD) analyses were also employed to identify variations of the chemical bonds and crystal structure of the membranes, respectively. Permeation of pure gases, CO, CHand Nthrough the prepared neat and nanocomposite membranes was studied at pressures of 3–18 bar and temperature of 25 °C. The obtained results showed that the fabricated nanocomposite membranes exhibit better separation performance compared to the neat PEBAX membrane in terms of both permeability and selectivity. As an example, at temperature of 25 °C and pressure of 3 bar, COpermeability, ideal CO/CHand CO/Nselectivity values for the neat PEBAX membrane are 110.67 Barrer, 11.09 and 50.08, respectively, while those values are 152.27 Barrer,13.52 and 62.15 for PEBAX/ZnO nanocomposite membrane containing 8 wt% ZnO. 展开更多
关键词 nanocomposite membrane zno nanoparticles PEBAX-1074 CO2/CH4 separation
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无溶剂MWNTs纳米流体/聚丙烯纳米复合材料性能研究
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作者 张军 郑亚萍 +1 位作者 杨睿璐 秦明 《玻璃钢/复合材料》 CAS CSCD 北大核心 2015年第10期31-35,共5页
以MWNTs为核,采用3-硅羟基-1-丙基氯化铵和磺酸盐PEGS,通过离子键,制备离子型无溶剂MWNTs纳米流体。通过TEM、DSC、TGA、流变仪对无溶剂MWNTs纳米流体的结构和性能进行表征。采用溶液法和机械法制备无溶剂MWNTs纳米流体/聚丙烯纳米复合... 以MWNTs为核,采用3-硅羟基-1-丙基氯化铵和磺酸盐PEGS,通过离子键,制备离子型无溶剂MWNTs纳米流体。通过TEM、DSC、TGA、流变仪对无溶剂MWNTs纳米流体的结构和性能进行表征。采用溶液法和机械法制备无溶剂MWNTs纳米流体/聚丙烯纳米复合材料,研究无溶剂MWNTs对聚丙烯结晶性的影响。研究表明,无溶剂纳米流体中MWNTs的含量为23.67wt%,具有固-液转变现象。无溶剂MWNTs纳米流体加入聚丙烯中,均促进了聚丙烯树脂形成晶核的过程,使形成的晶核数目增加,结晶度提高。 展开更多
关键词 无溶剂纳米流体 碳纳米管 聚丙烯 液体化 纳米复合材料
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Nano-sized Sn/MWNTs and MWNTs Served as the Anode of Lithium Ion Battery
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作者 林克芝 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2006年第4期60-63,共4页
A chemical deposition was supposed to be an effwient method in preparation of nano-sized Sn/ MWNTs. The nanoconmposites of MWNTs and Sn/ MWNTs were both used as anodes of lithium ion battery. The special capacities an... A chemical deposition was supposed to be an effwient method in preparation of nano-sized Sn/ MWNTs. The nanoconmposites of MWNTs and Sn/ MWNTs were both used as anodes of lithium ion battery. The special capacities and coulomb efficiencies of Snl MWNTs were studied by means of electrochemical methods. The coating of Sn on MWNTs observed by TEM was amorphous and nano-sized. The reversible capacity of Sn/ MWNTs , which was much larger than that of MWNTs , was 824 mAh/ g in the 1 st charge and discharge cycle. The coulomb efficiency of Sn/ MWNTs in the 1 st cycle was increased by 16% compared with that of MWNTs. The additional Sn, which was 37wt% of total Sn/ MWNTs' weight, introduced the additional reversible lithiation capacity at least 250 mAh/ g in the 40 charge and discharge cycles. The dispersing degree of Sn on MWNTs was the main reason for the influence of the electrochemical perfomance of the Sn/ MWNTs . Sn/ MWNTs is proved to be a promising candidate as an anode of lithium ion battery. 展开更多
关键词 multi-walled carbon nanotubes mwnts deposition nanocomposites lithium ion battery tinbased materials
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Preparation of Polysulfonamide/ZnO Nanocomposite by In-Situ Polymerization
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作者 刘丽 邓捷 +2 位作者 王晓鹏 倪佳华 印杰 《Journal of Shanghai Jiaotong university(Science)》 EI 2007年第4期508-510,516,共4页
Polysulfonamide/zinc oxide(PSA/ZnO) nanocomposite films with w(ZnO)=0.5% were prepared by in-situ polymerization based on 4,4′-diaminodiphenylsulfone and terephthaloyl chloride in the common solvent N,N-Dimethylaceta... Polysulfonamide/zinc oxide(PSA/ZnO) nanocomposite films with w(ZnO)=0.5% were prepared by in-situ polymerization based on 4,4′-diaminodiphenylsulfone and terephthaloyl chloride in the common solvent N,N-Dimethylacetamide(DMAc). Atomic force microscopy (AFM) was employed to observe the microstructure of the composite film. The thermal property was investigated by TGA and mechanical property was characterized by DXLL-1000 electromechanical material testing machine. The results showed that the breaking strength of the film containing 0.5% ZnO was great enhanced. The average size of ZnO particles was below 100 nm. The introduction of ZnO as nano filler in PSA react as UV shield effect and make the composite mechanical property improved. 展开更多
关键词 zno polysulfonamide(PSA) nanocompositE mechanical property IN-SITU POLYMERIZATION
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Highly stable Ga-doped ZnO/polystyrene nanocomposite film with narrow-band cyan emission
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作者 Sanaz Alamdari Majid Jafar Tafreshi Morteza Sasani Ghamsari 《Journal of Semiconductors》 EI CAS CSCD 2022年第12期46-54,共9页
In the present study,a simple method for the preparation of a luminescent flexible gallium doped zinc oxide(GZO)/polystyrene nanocomposite film was developed.The prepared GZO powder was characterized through different... In the present study,a simple method for the preparation of a luminescent flexible gallium doped zinc oxide(GZO)/polystyrene nanocomposite film was developed.The prepared GZO powder was characterized through different optical and structural techniques.The XRD study revealed the existence of a wurtzite structure with no extra oxide peaks.Elemental-mapping,EDX,FTIR and XPS analyses were used to confirm the presence of elements and the several groups present in the structure.Under excitations of UV,the prepared hybrid nanocomposite showed a strong cyan emission with narrow full width at half the maximum value(20 nm)that has not been reported before.X-ray and laser-induced luminescence results of the hy-brid film revealed novel blue-green emission at room temperature.The prepared composite film showed a strong scintillation re-sponse to ionizing radiation.The strong emissions,very weak deep-level emissions,and low FWHM of composite indicate the de-sirable optical properties with low-density structural defects in the GZO composite structure.Therefore,the prepared hybrid film can be considered to be a suitable candidate for the fabrication of optoelectronic devices. 展开更多
关键词 Ga doped zno cyan emission narrow-band emission nanocompositE
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Nanocomposites Preparation and Its Application to Sensor
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作者 Dianqing Li Zhangfa Tong +2 位作者 Xiaowei Huang Shouli Bai Ruixian Luo 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2006年第A03期29-32,共4页
The nanocomposites of ZnO-SnO_2 and In_2O_3-SnO_2 were prepared by wet chemical co-precipitation method as a novel semiconductor gas sensing materials for the detection of environmentally toxic gases.Controlled prepar... The nanocomposites of ZnO-SnO_2 and In_2O_3-SnO_2 were prepared by wet chemical co-precipitation method as a novel semiconductor gas sensing materials for the detection of environmentally toxic gases.Controlled preparation parameters were critical towards the grain size and crystallinity of the obtained nanocomposites.The results showed that these nanocomposites exhibited high sensitivity and selectivity for the detection of CO and NO_x,and the sensitivity depended on the composition of the composite,calcination temperature and operating temperature.The gas sensing properties of the sensors were further improved through incorporation of dopants and surface additives.The gas sensing mechanism was also discussed by X-ray photoelectron spectroscopic (XPS) and temperature-programmed desorption (TPD) studies. 展开更多
关键词 zno-SnO2 In2O3-SnO2 nanocomposites gas sensor sensing properties
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The Effect of Titanium Dioxide and Zinc Oxide Nanoparticles on Some Mechanical Properties of Epoxy Nanocomposites: A Comparative Study
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作者 Khalid R. Al-Rawi 《Journal of Physical Science and Application》 2016年第1期105-109,共5页
A new type of inorganic-polymer materials of epoxy Titanium Dioxide and Zinc Oxide was prepared. In this work, the mechanical properties of polymer composites reinforced with ceramic nanoparticles were investigated. T... A new type of inorganic-polymer materials of epoxy Titanium Dioxide and Zinc Oxide was prepared. In this work, the mechanical properties of polymer composites reinforced with ceramic nanoparticles were investigated. Three points bending tests demonstrated an enhancement in flexural strength and flexural modulus respectively, compared to the pure epoxy. The reinforcement of nanoparticulate materials was Titanium Dioxide and Zinc Oxide with various weight fraction. Experimental tests results indicated that the composite materials have significantly higher modulus of elasticity than the matrix material. It was found that the enhancement in modulus of elasticity was directly proportional to the weight fraction of reinforcement material, and that Zinc Oxide composites have higher modulus of elasticity than Titanium Dioxide composites with equivalent of weight fraction. The wear results showed that nanoparticles improved the wear resistance of epoxy nanocomposites, the Titanium Dioxide matrix particles could improve the wear resistance of the epoxy more efficiently than Zinc Oxide particles. The fatigue test showed that the fatigue resistance of epoxy Zinc Oxide matrix particles was higher than that of Titanium Dioxide matrix particles. 展开更多
关键词 Nanoparticles EPOXY flexural strength flexural modulus Zinc Oxide zno Titanium Dioxide (TiO2) WEAR FATIGUE nanocomposites.
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Ce掺杂ZnO纳米复合材料的制备及光催化性能研究
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作者 费珊珊 《功能材料》 CAS CSCD 北大核心 2024年第8期8001-8007,8015,共8页
以ZnO作为光催化剂,稀土元素Ce为添加相,通过水热法制备了不同摩尔比Ce掺杂的ZnO纳米复合材料,以甲基橙(MO)染料为降解对象,研究了Ce掺杂摩尔比对ZnO纳米复合材料的晶格结构、微观形貌和光催化性能的影响。结果表明,制备的Ce-ZnO纳米复... 以ZnO作为光催化剂,稀土元素Ce为添加相,通过水热法制备了不同摩尔比Ce掺杂的ZnO纳米复合材料,以甲基橙(MO)染料为降解对象,研究了Ce掺杂摩尔比对ZnO纳米复合材料的晶格结构、微观形貌和光催化性能的影响。结果表明,制备的Ce-ZnO纳米复合材料均为六方晶系纤锌矿结构,外观为不规则的颗粒状,Ce掺杂后使ZnO的表面粗糙度增加。Ce掺杂后在ZnO中无新产物产生,没有影响ZnO的结构。随着Ce掺杂摩尔比的增大,Ce-ZnO的比表面积逐渐增大,吸收边先增大后减小,禁带宽度先降低后升高,光致发光强度先降低后增大。0.6%Ce-ZnO的比表面积达到33.91 m^(2)/g,吸收边最大为394 nm,禁带宽度最小为2.97 eV,对应的光致发光强度最低。光催化降解测试表明,随着Ce掺杂摩尔比的增大,Ce-ZnO对MO的光催化降解率先增大后降低,0.6%Ce-ZnO在180 min时对MO的降解率达到最大值95.36%。强酸或强碱条件下均不利于光催化反应的进行,在pH值=5的弱酸条件下0.6%Ce-ZnO对MO的降解率最高达到99.16%。0.6%Ce-ZnO光催化剂重复使用5次时对MO的降解率依旧超过70%,具有良好的使用稳定性和经济效益。 展开更多
关键词 CE掺杂 zno 纳米复合材料 甲基橙 光催化
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