Enhancing visible light-activated NO2 sensing properties of Au NPs decorated ZnO nanorods by localized surface plasmon resonance and oxygen vacancies
Enhancing visible light-activated NO2 sensing properties of Au NPs decorated ZnO nanorods by localized surface plasmon resonance and oxygen vacancies
复制标题
通过局域表面等离子体共振和氧空位增强 Au NP 修饰的 ZnO 纳米棒的可见光激活 NO2 传感性能
DOI：
10.1088/2053-1591/ab6b64
复制
发表时间：
2020-01-01
影响因子：
2.3
通讯作者：
Su, Yuanjie
中科院分区：
文献类型：
--
作者：
Chen, Chunxu;Zhang, Qiuping;Su, Yuanjie
增加光吸收对于优化光激活气体检测至关重要。然而，相关研究还远远不够。本文利用表面等离子体共振(LSPR)的局域效应和表面氧空位的增加，研制了一种高性能的可见光激活NO2气体传感器。采用两步低温水热法制备了金纳米颗粒修饰的氧化锌纳米棒阵列敏感材料。系统地研究了金的修饰和光波长对传感行为的影响。研究发现，与纯的氧化锌薄膜相比，金纳米粒子的修饰可以大大提高薄膜的可见光激活气敏性能。此外，所制备的传感器具有良好的重复性和选择性以及水分稳定性。此外，还详细讨论了基于LSPR的传感机制。这项工作不仅对LSPR增强型气体传感机理有了一些基本的认识，而且为构建高性能的光敏型气体传感器提供了一种途径。
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.