Low temperature carbon monoxide gas sensor based on Co3O4@TiO2 nanocomposites: Theoretical and experimental analysis

被引：34

作者：

Li, Song ^{[1
]}

Wei, Xiao ^{[1
]}

Zhu, Shiping ^{[1
]}

Zhou, Qu ^{[1
]}

Gui, Yingang ^{[1
]}

机构：

[1] Southwest Univ, Coll Engn & Technol, Chongqing 400715, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 882卷

基金：

中国国家自然科学基金;

关键词：

Co3O4@TiO2; Compound material; Gas sensor; First principles; CO3O4; PERFORMANCE; ETHANOL; TIO2;

D O I：

10.1016/j.jallcom.2021.160710

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the present work, nanostructures of metal-oxide semiconductors (TiO2 and Co3O4) were combined to obtain a novel chemoresistive sensor. The experimental results show that there is a linear relationship between gas flow rate and adsorption response. The adsorption response of the composite can reach 15.993, and has good selectivity, linearity(R-2 = 0.96077) and repeatability at the same gas flow (300 sccm) and temperature(140 degrees C). Besides, based on the first principles, the promotion effect of Co3O4 supported TiO2 on CO adsorption was verified from the electronic properties. The experimental and theoretical indicate that the Co3O4@TiO2 nanocomposites is an excellent carbon monoxide gas sensing material and has a wide application prospect. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：9

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