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《纳米氧化锌》等成为纳米产品首批国家标准
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《中国铅锌锡锑》 2005年第3期38-38,共1页
中国新闻网报道,中国纳米材料生产今后将有标准可依。国家质检总局和国家标准化管理委员会3月1日宣布:《纳米材料术语》、《纳米氧化锌》等七项纳米材料国家标准将于二00五年四月一日正式实施。这是世界上首次以国家标准形式发布的纳... 中国新闻网报道,中国纳米材料生产今后将有标准可依。国家质检总局和国家标准化管理委员会3月1日宣布:《纳米材料术语》、《纳米氧化锌》等七项纳米材料国家标准将于二00五年四月一日正式实施。这是世界上首次以国家标准形式发布的纳米高新技术标准。 展开更多
关键词 中国 纳米材料 国家标准 《纳米材料术语》 《纳米氧化锌》
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Synthesis of One-Dimensional ZnO Na norods by Oxidating Zinc Films Deposited with Magnetron Sputtering 被引量:5
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作者 石礼伟 李玉国 +2 位作者 王强 薛成山 王书运 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2004年第10期1211-1214,共4页
One-dimensional ZnO nanorods are synthesized by ox idating thin metal zinc films deposited on Si(111) substrates with radio frequen cy magnetron sputtering.The crystal structure,surface morphology,and optical pro per... One-dimensional ZnO nanorods are synthesized by ox idating thin metal zinc films deposited on Si(111) substrates with radio frequen cy magnetron sputtering.The crystal structure,surface morphology,and optical pro perties of nanorods are investigated.X-ray diffraction(XRD) pattern,scanning el ectron microscopy(SEM),and transmission electron microscopy(TEM) analyses show t hat the synthesized single-crystal ZnO nanorods develop like hairpins along dif ferent radials,with a hexagonal wurtzite structure.The diameters of nanorods ran ge between 30 and 60nm and lengths up to micrometers.Photoluminescence(PL) analy sis shows that,under 280nm light excitation,a strong and sharp near band-edge U V light emission band at 372nm and a relatively weak green deep-level light emi ssion band at 516nm are observed from the ZnO nanorods,which indicates excellent crystallization and optical quality of the fabricated ZnO nanorods. 展开更多
关键词 magnetron sputtering thermal oxidation ZNO nan orods properties
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Preparation and sensing performance of petal-like RuO_2 modified ZnO nanosheets via a facile solvothermal and calcination method 被引量:3
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作者 李酽 李国柱 +3 位作者 邹云玲 王琼 周青军 连晓雪 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第9期2896-2903,共8页
Petal-like ZnO nanosheets were synthesized with zinc nitrate hexahydrate and sodium hydroxide as starting materials in ammonia and ethanol mixture solution. RuO2 modified ZnO nanosheets were also prepared by a calcina... Petal-like ZnO nanosheets were synthesized with zinc nitrate hexahydrate and sodium hydroxide as starting materials in ammonia and ethanol mixture solution. RuO2 modified ZnO nanosheets were also prepared by a calcination route. The as-prepared products were characterized by X-ray powder diffraction and field emission scanning electron microscopy, and its specific BET surface area was calculated by nitrogen adsorption method. The sensitivity, response and recovery speed were examined. The results show that RuO2 modified petal-like ZnO based sensor exhibits a high sensitivity, a low detection limit, fast response and recovery properties to ethanol and acetone. The sensitivities of the RuO2 modified petal-like ZnO based sensor to 100×10^-6 ethanol and acetone at 360 °C are 33 and 67, respectively. The response and recovery times of the sensor are 4 s and 9 s to 10×10^-6 ethanol, and are 3 s and 10 s to 10×10^-6 acetone, respectively. 展开更多
关键词 ZNO RUO2 NANOSHEETS gas sensing ethanol ACETONE
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Preparation and electrochemical performance of nano-scale Ni(OH)_2 doped with zinc 被引量:2
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作者 赵力 刘志豪 金雷 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第4期1033-1038,共6页
Nano-scale Ni(OH)2 doped with Zn was prepared by precipitation transformation method and characterized by XRD and TEM. The electrochemical performance was investigated by cyclic voltammetry (CV) and constant curre... Nano-scale Ni(OH)2 doped with Zn was prepared by precipitation transformation method and characterized by XRD and TEM. The electrochemical performance was investigated by cyclic voltammetry (CV) and constant current technology. The measurement results indicate that the lattice parameters of nano-scale Ni(OH)2 are changed and the agglomeration of particles becomes obvious with the increased Zn-doped content. Compared with un-doped one, the discharge specific capacities ofnano-scale Ni(OH)2 doped with 10% Zn are enhanced by 8% and 6%, respectively, at the discharge rate of 0.2C and 3C. After 110 cycles, the discharge specific capacity of the sample doped with 10% zinc is still above 85% of its initial capacity discharged at 0.2C. Therefore, a suitable Zn-doped content is beneficial to improving the discharge performance of nano-scale Ni(OH)2. 展开更多
关键词 NANO-MATERIALS nickel hydroxide Zn doping electrochemical performance
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Enhanced Photoelectrochemical Property of Zn Loaded TiO2 Nanotube Arrays Electrode 被引量:2
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作者 肖鹏 李露 +3 位作者 张云怀 戴洪法 胡玉琢 卢露 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2010年第1期113-116,I0002,共5页
TiO2 nanotube arrays (TNTs) electrode loaded with Zn nanoparticles was prepared by anodization and the size of Zn nanoparticle loaded on TNTs electrode was controlled by chronoamperometry deposition time. Results of... TiO2 nanotube arrays (TNTs) electrode loaded with Zn nanoparticles was prepared by anodization and the size of Zn nanoparticle loaded on TNTs electrode was controlled by chronoamperometry deposition time. Results of SEM and XRD analysis show that Zn nanoparticles had a diameter of about 15-25 nm when the deposition time was 3-5 s. The UV-Vis diffuse reflectance spectra show the Zn loaded harvest light with 480-780 nm more effectively than the unloaded sample. The photocurrent response of Zn loaded TNTs electrodes were studied, the results showed that TNTs electrodes loaded with Zn nanoparti-cles has 50% increased photocurrent response under high-pressure mercury lamp irradiation compared with unloaded TNTs electrode. 展开更多
关键词 Zn nanoparticle TiO2 nanotube PHOTOCURRENT
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CeO_2/Zn NANOCOMPOSITE COATING BY ELECTRODEPOSITION 被引量:7
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作者 骆心怡 何建平 李顺林 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2002年第2期161-165,共5页
The nanocomposite coating is obtained by electrochemical deposition of the zinc plating solution with ceria nanoparticles (mean diameter 30 nm). The effect of ceria nanoparticles on the electrodeposited zinc coating i... The nanocomposite coating is obtained by electrochemical deposition of the zinc plating solution with ceria nanoparticles (mean diameter 30 nm). The effect of ceria nanoparticles on the electrodeposited zinc coating is stu died by weight loss test, inductively copuled plasma quantometer (ICP), scanning electron microscopy (SEM) and X ray diffraction (XRD), respectively. It is found that under the same electrodeposition conditions, the corrosion resistance of the nanocomposite coating increases obviously while that of the micron composite coating only improves slightly; The ceria content of the nanocomposite coating is more than that of the micron composite coating. Ceria nanoparticles modify the surface morphology and crystal structure of the zinc matrix in correlation with the increase of corrosion resistance. 展开更多
关键词 composite electrodeposition ceria nanoparticles nanocomposite coating corrosion resistance zinc coating
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IN-SITU POLYMERIZED SYNTHESIS AND PROPERTIES OF NANO-ZnO/PEG/PET COMPOSITE
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作者 董祥 陶杰 汪涛 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2008年第4期303-310,共8页
Nano-ZnO particle (nZnOp) reinforced polyethylene glycol (PEG)/polyethylene terephthalate (PET) (nZnOp/PEG/PET) copolymeric composites with different mass fractions and molecular weights of PEG are synthesized... Nano-ZnO particle (nZnOp) reinforced polyethylene glycol (PEG)/polyethylene terephthalate (PET) (nZnOp/PEG/PET) copolymeric composites with different mass fractions and molecular weights of PEG are synthesized via in-situ polymerization. The dispersion of nZnOp in copolymer matrixes and the effects of PEG and nZnOp particles on the crystallization behavior of the composites are studied by TEM, differential scanning calorimetry(DSC), XRD and Fourier thansform infrared spectroscopy (FTIR ). The results reveal that nZnOp particles are dispersed in the matrixes with nano-scale, and the addition of PEG induces more homogeneous dispersion of nZnOp. Simultaneously, these nanoparticles become nucleating centers during the crystallization of the matrixes. PEG segments can improve the flexibility of the PET molecular chain, resulting in the drop of the cold crystallization temperature and the rise of the crystallization rate of the composites. Furthermore, PEG (4 000) with the mass fraction of 10% can promote the crystallization rate of the composites. The mechanical properties show that the nano-particles strengthen and toughen the PET matrix, whereas PEG weakens these improve- ments. 展开更多
关键词 polyethylene terephthalate (PET) polyethylene glycol (PEG) NANO-COMPOSITES nano zinc oxide (ZnO)
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High Performance of Enhanced Mode Field Effect Transistor and Ultraviolet Sensor Based on ZnO Nanosheet
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作者 高志伟 吴昱昆 +1 位作者 李俊文 王晓平 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2015年第1期1-5,I0001,共6页
ZnO nanosheets with thickness of a few nanometers are prepared by vapor transport and condensation method, and their structure and optical properties are well characterized. Field effect transistor (FET) and ultravi... ZnO nanosheets with thickness of a few nanometers are prepared by vapor transport and condensation method, and their structure and optical properties are well characterized. Field effect transistor (FET) and ultraviolet (UV) sensors are fabricated based on the ZnO nanosheets. Due to the peculiar structure of nanosheet, the FET shows n-type enhanced mode behavior and high electrical performance, and its field-effect mobility and on/off cur- rent ratio can reach 256 cm2/(V.s) and ~10^8, respectively. Moreover, the response of UV sensors can also be remarkably improved to ~3 × 10^8. The results make the ZnO nanosheets be a good material for the applications in nanoelectronic and optoelectronic devices. 展开更多
关键词 ZNO NANOSHEETS Field effect transistor UV sensor
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Synthesis and photoluminescence of Y and Cd co-doped ZnO nanopowder 被引量:1
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作者 宋季岭 郑佳红 +2 位作者 赵真 周柏玉 连建设 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第8期2336-2340,共5页
Y and Cd co-doped ZnO nanopowders were prepared via chemical precipitation method in order to modify the band gap and increase the luminescent intensity. The structures and optical properties of the as-synthesized sam... Y and Cd co-doped ZnO nanopowders were prepared via chemical precipitation method in order to modify the band gap and increase the luminescent intensity. The structures and optical properties of the as-synthesized samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL). The effects of Y and Cd ions on the optical properties of the samples were studied. Doping of Y into ZnO evidently increases the intensity of UV emission, or co-doping of Y and Cd enhances the UV emission, narrows the band gap of ZnO and hence red shifts the UV emission at the same time. Therefore, Y and Cd co-doped ZnO nanopowders exhibit an intense violet emission in the room temperature PL spectrum, which could be a potential candidate material for optoelectronic applications. 展开更多
关键词 ZnO nanopowders chemical precipitation optical properties
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High Performance Ultraviolet Photodetector Fabricated with ZnO Nanoparticles-graphene Hybrid Structures 被引量:1
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作者 刘金养 于欣欣 +4 位作者 张光辉 吴昱昆 张琨 潘楠 王晓平 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2013年第2期225-230,I0004,共7页
Ultraviolet (UV) photodetector constructed by ZnO material has attracted intense research and commercial interest. However, its photoresistivity and photoresonse are still unsatisfied. Herein, we report a novel meth... Ultraviolet (UV) photodetector constructed by ZnO material has attracted intense research and commercial interest. However, its photoresistivity and photoresonse are still unsatisfied. Herein, we report a novel method to assemble ZnO nanoparticles (NPs) onto the reduced graphite oxide (RGO) sheet by simple hydrothermal process without any surfactant. It is found that the high-quality crystallized ZnO NPs with the average diameter of 5 nm are well dispersed on the RGO surface, and the density of ZnO NPs can be readily controlled by the concentration of the precursor. The photodetector fabricated with this ZnO NPs- RGO hybrid structure demonstrates an excellent photoresponse for the UV irradiation. The results make this hybrid especially suitable as a novel material for the design and fabrication of high performance UV photodector. 展开更多
关键词 ZnO nanoparticle Reduced graphite oxide Hybrid structure UV photodector
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Morphology and Growth Process of Bat-like ZnO Crystals by Thermal Evaporation 被引量:1
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作者 高品 王凯 +2 位作者 黄超 孟路 徐法强 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第3期369-373,I0002,共6页
A novel bat-like ZnO nanostructure was synthesized on the silicon substrate by simple ther- mal evaporation of zinc powders without any catalyst. Each bat-like nanorod ("nanobat") is composed of a hexagonal head, ... A novel bat-like ZnO nanostructure was synthesized on the silicon substrate by simple ther- mal evaporation of zinc powders without any catalyst. Each bat-like nanorod ("nanobat") is composed of a hexagonal head, a continuous neck and a thin handle. High-resolution transmission electron microscopy and selected area electron diffraction results reveal the single-crystalline feature and the growing direction along [0001] of the nanobat. The vapor- solid mechanism was found suitable to explain the growth process of the nanobat and a schematic model was proposed in detail based on the experimental results. 展开更多
关键词 ZNO Thermal evaporation NANOSTRUCTURE Growth process
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ZnO Nanobelts and Hollow Microspheres Grown on Cu Foil 被引量:2
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作者 庄彬平 赖发春 +3 位作者 林丽梅 林明豹 瞿燕 黄志高 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2010年第1期79-83,I0002,共6页
ZnO nanobelts, hollow microspheres, and urchins have been prepared on copper foil via a simply low temperature evaporation route. The microstructure, morphologies, and photolu-minescence of the ZnO nanostructures were... ZnO nanobelts, hollow microspheres, and urchins have been prepared on copper foil via a simply low temperature evaporation route. The microstructure, morphologies, and photolu-minescence of the ZnO nanostructures were studied with X-ray diffraction, Raman spectra, scanning electron microscopy and photoluminescence spectra. The width of the nanobelts was about 500 nm and the length was longer than 10μm. The diameter of the hollow microspheres was between 5 and 10μm. A possible growth mechanism of the nanobelts, microspheres and urchins was proposed. The photoluminescence spectrum exhibited strong deep level energy emissions and a weak near band edge emission. These ZnO nanostructures on a copper substrate have the advantages of naturally good adhesion and electrical connection between the ZnO nanostructures and the conductive substrate. 展开更多
关键词 Thermal evaporation ZnO nanostructure Cu foil Growth mechanism
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Effect of calcination temperatures on photocatalytic H_(2)O_(2)-production activity of ZnO nanorods 被引量:7
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作者 Zicong Jiang Yong Zhang +2 位作者 Liuyang Zhang Bei Cheng Linxi Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第2期226-233,共8页
Photocatalytic hydrogen peroxide(H_(2)O_(2))production from O_(2) and H2O is an ideal process for solar‐to‐chemical energy conversion.Herein,ZnO nanorods are prepared via a simple hydrothermal method for photocataly... Photocatalytic hydrogen peroxide(H_(2)O_(2))production from O_(2) and H2O is an ideal process for solar‐to‐chemical energy conversion.Herein,ZnO nanorods are prepared via a simple hydrothermal method for photocatalytic H_(2)O_(2) production.The ZnO nanorods exhibit varied performance with different calcination temperatures.Benefiting from calcination,the separation efficiency of photo‐induced carriers is significantly improved,leading to the superior photocatalytic activity for H_(2)O_(2) production.The H_(2)O_(2) produced by ZnO calcined at 300℃ is 285μmol L^(−1),which is over 5 times larger than that produced by untreated ZnO.This work provides an insight into photocatalytic H2O2 production mechanism by ZnO nanorods,and presents a promising strategy to H2O2 production. 展开更多
关键词 PHOTOCATALYSIS Hydrogen peroxide production ZnO nanorod Calcination temperature Oxygen reduction
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Effect of annealing treatment on morphologies and gas sensing properties of ZnO nanorods
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作者 张建交 郭二军 +3 位作者 王丽萍 岳红彦 曹国剑 宋良 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第3期736-742,共7页
The high-temperature stabilization of ZnO nanorods synthesized by hydrothermal treatment was investigated. The structure and morphologies of ZnO nanorods were characterized by XRD and SEM, respectively. The thermal st... The high-temperature stabilization of ZnO nanorods synthesized by hydrothermal treatment was investigated. The structure and morphologies of ZnO nanorods were characterized by XRD and SEM, respectively. The thermal stability of ZnO nanorods was also detected by thermal gravity analyzing. Thermal annealing treatment results indicate that ZnO nanorods are fundamentally stable when annealing temperature is lower than 600 ℃. When annealing temperature is beyond 600℃, the diameters of ZnO nanorods obviously decrease and the aggravating tendency of nanorods between each other also increase. Annealing treatment can greatly influence the gas sensing properties of ZnO nanorods. Comparing with ZnO nanorods without annealing treatment, the gas sensing property of ZnO nanorods to H2 with concentration of 2.5×10-6 can increase from 2.22 to 3.56. ZnO nanorods annealed at 400 ℃ exhibit optimum gas sesing property to H2 gas. 展开更多
关键词 ZnO nanorods annealing treatment gas sensing property
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Light-induced ZnO/Ag/rGO bactericidal photocatalyst with synergistic effect of sustained release of silver ions and enhanced reactive oxygen species 被引量:10
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作者 Yunyan Wu Lili Zhang +3 位作者 Yazhou Zhou Qinqin Liu Juan Hu Juan Yang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第5期691-702,共12页
Silver nanoparticles (Ag NPs) can effectively address the issue of antibiotic-resistant bacterial infections to reduce the potential toxicity of Ag NPs. Although challenging, it is, therefore, necessary to achieve the... Silver nanoparticles (Ag NPs) can effectively address the issue of antibiotic-resistant bacterial infections to reduce the potential toxicity of Ag NPs. Although challenging, it is, therefore, necessary to achieve the sustainable release of Ag+ ions from a finite amount of Ag NPs. This study aims at designing an efficient and benign antimicrobial silver-based ternary composite composed of photocatalysis zinc oxide (ZnO) and reduced graphene oxide (rGO) as a carrier, in which the reactive oxygen species (ROS) excited from ZnO and Ag+ ions released from the Ag NPs cooperate to realize an effective antibacterial activity against E. coli and S. aureus. The constant effective bacterial performance of the ternary photocatalyst with minimum Ag content can be attributed to the increase in the available quantity of ROS, which results from the enhanced separation efficiency of the photogenerated carriers. The proposed system notably realized the long-term sustainable release of Ag+ ions with low concentration for 30 days when compared with an equivalent amount of silver nitrate. Moreover, the use of the composite prevents biotoxicity and silver wastage, and imparts enhanced stability to the long-lasting antibacterial efficacy. 展开更多
关键词 Zinc oxide Silver nanoparticle Reduced graphene oxide Sustained Ag+ ions release Synergistic antibacterial mechanism Reactive oxygen species
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Superior activity of Rh1/ZnO single-atom catalyst for CO oxidation 被引量:6
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作者 Bing Han Rui Lang +4 位作者 Hailian Tang Jia Xu Xiang-Kui Gu Botao Qiao Jingyue(Jimmy)Liu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第12期1847-1853,共7页
CO oxidation is of great importance in both fundamental study and industrial application.Supported noble metal catalysts are highly active for CO oxidation but suffer from the scarcity and high cost.Single-atom cataly... CO oxidation is of great importance in both fundamental study and industrial application.Supported noble metal catalysts are highly active for CO oxidation but suffer from the scarcity and high cost.Single-atom catalysts(SACs)can maximize the metal atom efficiency.Herein,ZnO nanowire(ZnO-nw)supported Rh,Au,and Pt SACs were successfully developed to investigate their CO oxidation performance.Interestingly,it was found that Rh1/ZnO-nw showed much higher activity than the other noble metals which are usually regarded as good candidates for CO oxidation.In addition,the Rh SAC possessed high stability in high-temperature CO oxidation under simulated conditions in the presence of water and hydrocarbons.The high activity and stability make Rh1/ZnO-nw promising for practical applications,especially in the automotive exhaust emission control.Theoretical calculations indicate that the CO oxidation proceeds via the Mars-van Krevelen mechanism and the lowest barrier for the rate-limiting O2 dissociation at a surface oxygen vacancy site is a key factor in determining the observed highest activity of Rh1/ZnO-nw amongst the studied SACs. 展开更多
关键词 Single-atom catalysis Carbon monoxide oxidation RHODIUM Zinc oxide nanowire Density functional theory calculations
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High photocatalytic activities of zinc oxide nanotube arrays modified with tungsten trioxide nanoparticles 被引量:2
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作者 Yawen Li Yuzhen Bu +2 位作者 Qian Liu Xia Zhang Junli Xu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第1期54-62,共9页
Well‐aligned zinc oxide(ZnO)nanotube arrays loaded with tungsten trioxide(WO3)nanoparticles were synthesized by a process involving chemical bath deposition in combination with pyrolysis.The prepared ZnO–WO3composit... Well‐aligned zinc oxide(ZnO)nanotube arrays loaded with tungsten trioxide(WO3)nanoparticles were synthesized by a process involving chemical bath deposition in combination with pyrolysis.The prepared ZnO–WO3composites were characterized by X‐ray diffraction,energy dispersive spectrometer,field emission scanning electron microscopy,X‐ray photoelectron spectroscopy,photoluminescence spectroscopy,Fourier transform infrared spectroscopy and UV–vis diffuse reflectance spectroscopy.The photocatalytic activities of the ZnO–WO3composite photocatalysts with different WO3contents for the degradation of the herbicide chlorinated phenoxyacetic acid(MCPA‐Na)under simulated sunlight irradiation were systematically evaluated.It was found that the WO3content had a great effect on the photocatalytic activity of the ZnO–WO3composites.The composite with3%WO3showed the highest photocatalytic activity,with a degradation rate of chlorinated phenoxyacetic acid of98.5%after200min with20mg of photocatalyst.This photodegradation rate was about twice that of the pristine ZnO nanotube array.The recombination of photogenerated electrons and holes was increasingly suppressed with the addition of WO3to ZnO.The high relative content of defects on the surface of the ZnO–WO3composites was beneficial to their photocatalytic activity in the degradation of chlorinated phenoxyacetic acid.?2018,Dalian Institute of Chemical Physics,Chinese Academy of Sciences.Published by Elsevier B.V.All rights reserved. 展开更多
关键词 Zinc oxide nanotube Tungsten trioxide Photocatalytic degradation ELECTRODEPOSITION Electronic property
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Study on Lubrication Properties of Modified Nano ZnO in Base Oil 被引量:1
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作者 Qian Jianhua Zhang Yu +1 位作者 Wang Lingling Xing Jinjuan (Liaoning Key Laboratory of Synthesis and Application of Functional Compounds,Bohai University,Jinzhou 121000) 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2011年第3期69-73,共5页
ZnO nanoparticles with an average size of 125 nm were prepared via homogeneous precipitation method and were characterized by SEM.The products were surface-modified by the surfactant SDS.Surface-modified nano particle... ZnO nanoparticles with an average size of 125 nm were prepared via homogeneous precipitation method and were characterized by SEM.The products were surface-modified by the surfactant SDS.Surface-modified nano particles were added at a mass ratio of 1.0%,2.0%,3.0%,and 4.0%,respectively,in base oil and their friction and wear behaviors were evaluated on a MRS-10D type four-ball wear tester.After four-ball wear tests,the morphology of the rubbing surfaces was evaluated with metallographic microscope.It was revealed that the modified nano ZnO had excellent behavior for improving anti-wear property and friction coefficient,which could greatly reduce the friction of machine parts. 展开更多
关键词 nano ZnO homogeneous precipitation surface modification ADDITIVE lubrication properties
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Highly Ordered Lattice Orientation of ZnO Nanoparticles Formed in Confined Space
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作者 窦树梅 刘巧鸿 +1 位作者 王文楼 刘先明 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2010年第4期484-490,I0002,共8页
Oriented aggregation of nanoparticles has been accomplished by means of solid state reac- tion. Non-crystallized and crystallized ZnO nanoparticles/clusters could be accommodated in the lamellar spacing of inorganic-o... Oriented aggregation of nanoparticles has been accomplished by means of solid state reac- tion. Non-crystallized and crystallized ZnO nanoparticles/clusters could be accommodated in the lamellar spacing of inorganic-organic composite, which were prepared by thermolysis of layered solid zinc-oleate complex at 260 and 300 ℃ in air, respectively. High-resolution transmission electron microscopy and selected area electron diffraction patterns indicate that aggregates are single crystals with various defects. The photoluminescence excitation spectra of both samples show two bands at 272 and 366 nm. The former may originate from electron transfer from valence band to conduction band in ZnO clusters composed of less than 200 ZnO molecules (2R〈2 nm). 展开更多
关键词 Solid state reaction ZnO cluster/nanoparticle High orientation Photoluminescence spectrum
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Large scale synthesis of ZnO nanoparticles via homogeneous precipitation 被引量:3
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作者 王益明 李建华 洪若瑜 《Journal of Central South University》 SCIE EI CAS 2012年第4期863-868,共6页
In order to synthesize ZnO nanoparticles economically, industrial-grade zinc sulfate and urea were utilized to synthesize ZnO precursors in a stirred-tank reactor or a Teflon-lined autoclave at 100-180 ℃ under comple... In order to synthesize ZnO nanoparticles economically, industrial-grade zinc sulfate and urea were utilized to synthesize ZnO precursors in a stirred-tank reactor or a Teflon-lined autoclave at 100-180 ℃ under complete sealing condition. The ZnO precursors were calcined at 450 ℃ for 3 h to, synthesize ZnO nanoparticles. The composition of the precursors and the formation mechanism of ZnO were studied by thermogravimetric analysis and Fourier transform infrared spectroscopy. The results of X-ray diffraction, transmission electron microscopy and scanning electron microscopy of the ZnO powders demonstrate that high-purity zincite ZnO nanoparticles are synthesized. Orthogonal experiments were performed to find out the optimal conditions for the maximum yield and the minimum size. The ettect of temperature on the size ofZnO nanoparticles was investigated. The results show that a higher temperature is propitious to obtain smaller nanoparticles. 展开更多
关键词 ZNO homogeneous synthesis sealing condition thermogravimetric analysis
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