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Cu-Ni nanowire-based TiO2hybrid for the dynamic photodegradation of acetaldehyde gas pollutant under visible light
Zhu, Shuying1,2; Xie, Xiaofeng1; Chen, Sheng-Chieh3; Tong, Shengrui4; Lu, Guanhong1; Pui, David Y.H.3; Sun, Jing1
2017
发表期刊Applied Surface Science
ISSN01694332
卷号408页码:117-124
摘要One-dimensional bimetallic nanowires were introduced into TiO2-based matrix to enhance their photocatalysis efficiency and expand their light absorption range in this work. Recently, metal nanowires have attracted many attention in photocatalyst research fields because of their favorable electronic transmission properties and especially in the aspect of surface plasmon resonance effects. Moreover, Cu-Ni bimetallic nanowires (Cu-Ni NWs) have shown better chemical stability than ordinary monometallic nanowires in our recent works. Interestingly, it has been found that Ni sleeves of the bimetallic nanowires also can modify the Schottky barrier of interface between TiO2and metallic conductor, so that be beneficial to the separation of photogenerated carriers in the Cu-Ni/TiO2network topology. Hence, a novel heterostructured photocatalyst composed of Cu-Ni NWs and TiO2nanoparticles (NPs) was fabricated by one-step hydrolysis approach to explore its photocatalytic performance. TEM and EDX mapping images of this TiO2NPs @Cu-Ni NWs (TCN) hybrid displayed that Cu-Ni NWs were wrapped by compact TiO2layer and retained the one-dimensional structure in matrix. In experiments, the photocatalytic performance of the TCN nanocomposite was significantly enhanced comparing to pure TiO2. Acetaldehyde, as a common gas pollutant in the environment, was employed to evaluate the photodegradation efficiency of a series of TCN nanocomposites under continuous feeding. The TCN exhibited excellent potodegradation performance, where the dynamic photocatalytic efficiency of TCN containing 3 wt% Cu-Ni NWs was about 88% and 56% (continuous 500 ppm CH3CHO feeding, 20 SCCM) under UV and visible light, respectively. ESR results proved that the recombination of photo-generated electron-hole pairs was inhibited significantly in TCN nanocomposite. Finally, the mechanism for electron-hole pairs’ separation and transmission at Schottky barrier interface between Cu-Ni NWs and TiO2layers has been proposed based on the above analyses. © 2017 Elsevier B.V.
DOI10.1016/j.apsusc.2017.02.217
EI入藏号20171103437237
EI主题词Titanium dioxide
EI分类号714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 761 Nanotechnology - 801 Chemistry - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 913.1 Production Engineering - 933 Solid State Physics
引用统计
文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/25654
专题中国科学院上海硅酸盐研究所
作者单位1.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing; 100049, China;
3.College of Science and Engineering, University of Minnesota, Minneapolis; MN; 55455, United States;
4.Institute of Chemistry, Chinese Academy of Sciences, Beijing; 100190, China
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Zhu, Shuying,Xie, Xiaofeng,Chen, Sheng-Chieh,et al. Cu-Ni nanowire-based TiO2hybrid for the dynamic photodegradation of acetaldehyde gas pollutant under visible light[J]. Applied Surface Science,2017,408:117-124.
APA Zhu, Shuying.,Xie, Xiaofeng.,Chen, Sheng-Chieh.,Tong, Shengrui.,Lu, Guanhong.,...&Sun, Jing.(2017).Cu-Ni nanowire-based TiO2hybrid for the dynamic photodegradation of acetaldehyde gas pollutant under visible light.Applied Surface Science,408,117-124.
MLA Zhu, Shuying,et al."Cu-Ni nanowire-based TiO2hybrid for the dynamic photodegradation of acetaldehyde gas pollutant under visible light".Applied Surface Science 408(2017):117-124.
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