Effect of Ag Addition on the Gas-Sensing Properties of Nanostructured Resistive-Based Gas Sensors: An Overview

Sensors

Mehrdad Shahbaz¹  Sang Sub Kim²  Ali Mirzaei³  Hyoun Woo Kim⁴  Sachin Navale⁴ 

[1] Department of Materials Science and Engineering, Faculty of Engineering, Urmia University, Urmia 5756-151818, Iran;Department of Materials Science and Engineering, Inha University, Incheon 22212, Korea;Department of Materials Science and Engineering, Shiraz University of Technology, Shiraz 71557-13876, Iran;Division of Materials Science and Engineering, Hanyang University, Seoul 04763, Korea;

关键词: Ag;    decoration/loading;    doping;    gas sensor;    sensing mechanism;   

DOI  :  10.3390/s21196454

来源: DOAJ

【 摘 要 】

Nanostructured semiconducting metal oxides (SMOs) are among the most popular sensing materials for integration into resistive-type gas sensors owing to their low costs and high sensing performances. SMOs can be decorated or doped with noble metals to further enhance their gas sensing properties. Ag is one of the cheapest noble metals, and it is extensively used in the decoration or doping of SMOs to boost the overall gas-sensing performances of SMOs. In this review, we discussed the impact of Ag addition on the gas-sensing properties of nanostructured resistive-based gas sensors. Ag-decorated or -doped SMOs often exhibit better responsivities/selectivities at low sensing temperatures and shorter response times than those of their pristine counterparts. Herein, the focus was on the detection mechanism of SMO-based gas sensors in the presence of Ag. This review can provide insights for research on SMO-based gas sensors.

【 授权许可】

Unknown