Improved response/recovery speeds of ZnO nanoparticle-based sensor toward NO2 gas under UV irradiation induced by surface oxygen vacancies

作者：Zhang, Qiuping; Chen, Chunxu; Liu, Yutong; Pan, Hong; Du, Hongfei; Su, Yuanjie; Tai, Huiling; Xie, Guangzhong^*; Xu, Ming; Du, Xiaosong

来源：Journal of Materials Science: Materials in Electronics , 2019, 30(12): 11395-11403.

DOI：10.1007/s10854-019-01488-6

• ROOM-TEMPERATURE
• PHOTOCATALYTIC ACTIVITY
• SENSING PROPERTIES
• NANOSTRUCTURES
• ENHANCEMENT
• FABRICATION
• COATINGS
• DEFECT

A fast and simple method using co-grinding with Fe powder followed by heat treatment is developed to regulate surface oxygen vacancy content of ZnO nanoparticles. The moderately increased surface oxygen vacancy is conducive to shortening the adsorption and desorption times of NO2 molecules, arising from the enhanced O-2 adsorption. Therefore, the response and recovery speeds of ZnO nanoparticle-based sensor under UV irradiation were significantly promoted. Our findings not only offer a feasible strategy to modulate surface oxygen vacancy content of nanostructured oxides, but also provide a novel approach to improve the response and recovery speeds of light-activated NO2 sensor.

• 单位
  电子科技大学; 西南民族大学