High-response and low-temperature nitrogen dioxide gas sensor based on gold-loaded mesoporous indium trioxide

Shan Li; Ming Cheng; Guannan Liu; Lianjing Zhao; Bo Zhang; Yuan Gao; Huiying Lu; Haiyu Wang; Jing Zhao; Fangmeng Liu; Xu Yan; Tong Zhang; Geyu Lu

doi:10.1016/j.jcis.2018.04.033

High-response and low-temperature nitrogen dioxide gas sensor based on gold-loaded mesoporous indium trioxide

J Colloid Interface Sci. 2018 Aug 15:524:368-378. doi: 10.1016/j.jcis.2018.04.033. Epub 2018 Apr 10.

Authors

Shan Li¹, Ming Cheng¹, Guannan Liu¹, Lianjing Zhao¹, Bo Zhang¹, Yuan Gao², Huiying Lu¹, Haiyu Wang¹, Jing Zhao³, Fangmeng Liu¹, Xu Yan¹, Tong Zhang¹, Geyu Lu⁴

Affiliations

¹ State Key Laboratory on Integrated Optoelectronics, Jilin Province Key Laboratory on Advanced Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
² State Key Laboratory on Integrated Optoelectronics, Jilin Province Key Laboratory on Advanced Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China. Electronic address: gaoyuan@jlu.edu.cn.
³ College of Electrical and Electronic Engineering, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, China.
⁴ State Key Laboratory on Integrated Optoelectronics, Jilin Province Key Laboratory on Advanced Gas Sensors, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China. Electronic address: lugy@jlu.edu.cn.

PMID: 29660624
DOI: 10.1016/j.jcis.2018.04.033

Abstract

Nitrogen dioxide (NO₂), as a typical threatening atmospheric pollutant, is hazardous to the environment and human health. Thus, the development of a gas sensor with high response and low detection limit for NO₂ detection is highly important. The highly ordered mesoporous indium trioxide (In₂O₃) prepared by simple nanocasting method using mesoporous silica as template and decorated with Au nanoparticles was investigated for NO₂ detection. The prepared materials were characterized by X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. Characterization results showed that the samples exhibited ordered mesostructure and were successfully decorated with Au. The gas sensing performance of the sensors based on a series of Au-loaded mesoporous In₂O₃ were systematically investigated. The Au loading level strongly affected the sensing performance toward NO₂. The optimal sensor, which was based on 0.5 wt% Au-loaded In₂O₃, displayed high sensor response and low detection limit of 10 ppb at low operating temperature of 65 °C. The excellent sensing properties were mainly attributed to the ordered mesoporous structure and the catalytic performance of Au. We believe that the Au-loaded mesoporous In₂O₃ can provide a promising platform for NO₂ gas sensors with excellent performance.

Keywords: Au; Gas sensor; In(2)O(3); Mesoporous material; NO(2).