Enhancing visible light-activated NO2 sensing properties of Au NPs decorated ZnO nanorods by localized surface plasmon resonance and oxygen vacancies

被引：39

作者：

Chen, Chunxu ^{[1
]}

Zhang, Qiuping ^{[1
]}

Xie, Guangzhong ^{[1
]}

Yao, Mingliang ^{[1
]}

Pan, Hong ^{[1
]}

Du, Hongfei ^{[1
]}

Tai, Huiling ^{[1
]}

Du, Xiaosong ^{[1
]}

Su, Yuanjie ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

来源：

MATERIALS RESEARCH EXPRESS | 2020年 / 7卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Au decorated ZnO nanorods; LSPR; surface oxygen vacancies; visible light-activated gas sensing; NO2; detection; PHOTOCATALYTIC ACTIVITY; GAS SENSOR; NANOPARTICLES; PERFORMANCE; OXIDE; NANOSTRUCTURES; NANOPYRAMIDS; NANOWIRES; SOLAR; FILMS;

D O I：

10.1088/2053-1591/ab6b64

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Increasing light absorption is of crucial importance for optimizing light-activated gas detection. However, the relevant research is still far from sufficient. Herein, a high performance visible light-activated NO2 gas sensor is developed relied on the localized surface plasmon resonance (LSPR) and increased surface oxygen vacancies. Au NPs decorated ZnO nanorod array as sensitive materials was synthesized via a two-step low temperature hydrothermal process. The influences of Au decoration and light wavelength on the sensing behaviors were systematically investigated. It is found that the Au NPs decoration can largely promote the visible light-activated gas sensing properties in comparison with pure ZnO film. In addition, the as-prepared sensors demonstrate excellent repeatability and selectivity as well as moisture stability. Moreover, the sensing mechanism based on LSPR was discussed in detail. This work not only sheds some lights on the fundamental understanding for the LSPR enhanced gas sensing mechanism, but also offers an approach in constructing high-performance light-activated gas sensor.

引用

页数：12

共 39 条

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