Characteristics and sensing properties of CO gas sensors based on LaCo1-xFexO3 nanoparticles

被引：20
作者：
Ding, Jun-Chao [1 ]
Li, Hua-Yao [1 ]
Cao, Tian-Ci [1 ]
Cai, Ze-Xing [1 ]
Wang, Xiao-Xue [1 ]
Guo, Xin [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Lab Solid State Ion, Wuhan 430074, Hubei, Peoples R China
来源：
SOLID STATE IONICS | 2017年 / 303卷
关键词：
LaCo1-xFexO3; Nanoparticles; CO sensor; Low temperature; CARBON-MONOXIDE; TEMPERATURE; OXIDATION; CATALYSTS; LACOO3; OXIDES; COPRECIPITATION; MICROSTRUCTURE; PEROVSKITES; SENSITIVITY;
D O I：
10.1016/j.ssi.2017.02.021
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：
LaCo1 - xFexO3 (x ranging from 0 to 1) nanoparticles were prepared using the co -precipitation method, and the CO gas sensing properties of LaCo1 - xFexO3 nanoparticles were investigated. The LaCo0.3Fe0.7O3 sensor shows the highest response at 250 degrees C (S = 40.9), and reliable dynamic response-and-recovery to different CO concentrations at a temperature as low as 50 degrees C. On the other hand, the LaC0.2Fe0.8O3 sensor exhibits the fastest response and recovery in the entire temperature region of 250 to 450 degrees C. The excellent CO sensing properties could be ascribed to the intense oxidation of CO by adsorbed O-2 on the LaCo1 - xFexO3 (x = 0.6, 0.7, 0.8) surface. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：97 / 102
页数：6
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