检出限
煅烧
氯
氯气
制作
选择性
材料科学
甲醛
纳米技术
化学工程
化学
色谱法
催化作用
有机化学
冶金
病理
替代医学
工程类
医学
作者
Jiangwei Ma,Huiqing Fan,Weiming Zhang,Jianan Sui,Chao Wang,Mingchang Zhang,Nan Zhao,Arun Kumar Yadav,Weijia Wang,Wenqiang Dong,Shuren Wang
标识
DOI:10.1016/j.snb.2019.127456
摘要
Chlorine (Cl2) gas sensors with outstanding gas response and ultra-low detection limit by an easy and economical fabrication are increasingly in demand in practical application. In this work, In2O3 nanosheets with excellent gas sensing properties for Cl2 have been successfully synthesized using melamine-formaldehyde (MF) sponge as the template via a simple soak-drying-calcination approach. The gas response (Rgas/Rair) of In2O3 nanosheets sensor is up to 2353.4 toward 3 ppm Cl2 at 200 °C, which is about 158 times compared with In2O3 particles (14.9). The selectivity to Cl2 reaches up to 254.3 against other interferential gases. Additionally, the sensor based on In2O3 nanosheets displays extremely low detection limit of 0.037 ppb. Such excellent gas sensing performance is primarily ascribed to the unique sheet structure and abundant oxygen vacancies which are formed during the removal of MF sponge template. Therefore, the In2O3 nanosheets sensor shows great potential in Cl2 detection.
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