Ultrahigh methane sensing properties based on Ni-doped hierarchical porous In2O3 microspheres at low temperature

被引：12

作者：

Zhang, Yongjie ^{[1
]}

Cao, Jianliang ^{[1
,2
]}

Wang, Yan ^{[2
]}

机构：

[1] Henan Polytech Univ, Coll Chem & Chem Engn, Jiaozuo 454000, Peoples R China

[2] Henan Polytech Univ, State Collaborat Innovat Ctr Coal Work Safety & Cl, Jiaozuo 454000, Peoples R China

来源：

VACUUM | 2022年 / 202卷

基金：

中国国家自然科学基金;

关键词：

In2O3??????; Microspheres; Porous structure; Ni-doped; CH4; sensors; HYDROTHERMAL SYNTHESIS; HIGH RESPONSE; NANORODS; SENSORS;

D O I：

10.1016/j.vacuum.2022.111149

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Improving the methane (CH4) sensing characteristics of metal oxide semiconductors is a vital research issue. Herein, we reported the synthesis of porous Ni-doped In2O3 microspheres through an effective solvothermal strategy. The composition and structure of the as-prepared samples as well as the CH4 sensing properties were systematically characterized and investigated. The results demonstrate that Ni-doped In2O3 microspheres possess suitable pore sizes, small particle sizes and oxygen-enriched defects. Compared to bare In2O3 sensor, the sensor based on 5.0 mol% Ni-doped In2O3 (NIO-5.0) shows enhanced response (72.727) to 200 ppm CH4 at relatively low operating temperature (140 C). Meanwhile, it also displays good selectivity, superior repeatability and long-term stability. The enhanced CH(4-)sensing performance could be mainly attributed to the stable porous structure and the abundant oxygen vacancy defects induced by Ni doping. Significantly, this work provides a great application prospect of Ni-doped In2O3 porous microspheres for low-temperature and high-response CH4 detection.

引用

页数：9