Highly improved toluene gas-sensing performance of mesoporous Ag-anchored cobalt oxides nanowires

被引：23
|
作者：
Yue, J. H. [1 ]
Wang, L. [1 ]
Xu, J. C. [1 ]
Jin, H. X. [1 ]
Hong, B. [1 ]
Jin, D. F. [1 ]
Gong, J. [1 ]
Peng, X. L. [1 ]
Ge, H. L. [1 ]
Wang, X. Q. [1 ]
机构：
[1] China Jiliang Univ, Coll Mat Sci & Chem, Hangzhou 310018, Peoples R China
来源：
ADVANCED POWDER TECHNOLOGY | 2022年 / 33卷 / 11期
关键词：
Ag-loading; Microstructure; Toluene gas; Gas-sensing performance; ORGANIC FRAMEWORK; CARBON-MONOXIDE; OPTICAL-PROPERTIES; CO3O4; NANOPARTICLES; NANOCATALYSTS; MECHANISM; VOCS; WO3;
D O I：
10.1016/j.apt.2022.103832
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Mesoporous cobalt oxides nanowires (Co3O4 NWs) were synthesized by the nanocasting method, and then Ag nanoparticles with the different content were anchored on the surface of Co3O4 NWs. The exper-imental results indicate that Ag nanoparticles hardly affect the morphology and microstructure of Co3O4 NWs and actually exist on the surface of Co3O4 NWs. It is worth mentioning that Ag-loading greatly improves the toluene gas-sensing performance of Ag-anchored Co3O4 NWs. The operating temperature of Ag-anchored Co3O4 NWs sensors decreases from 210 degrees C for Co3O4 NWs sensor to 190 degrees C, while the response to 100 ppm toluene gas increases 3-folds. Ag0.166-Co3O4 NWs sensor exhibits the best gas -sensing performance due to the optimal Ag-loading content. Ag nanoparticles not only provide more effective oxygen adsorption sites to reduce resistance in air, but also form metal-semiconductor hetero-junctions at the Ag/Co3O4 interface to increase resistance in toluene gas. In this way, Ag-loading can fur-ther improve the gas-sensing performance of mesoporous Ag-anchored Co3O4 NWs sensors to toluene gas.(c) 2022 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
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页数：9
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