Citation: Wang Qingji, Bao Liwen, Cao Zongqiang, Li Chaoyang, Li Xu, Liu Fangmeng, Sun Peng, Lu Geyu. Microwave-assisted hydrothermal synthesis of Pt/SnO₂ gas sensor for CO detection[J]. Chinese Chemical Letters, ;2020, 31(8): 2029-2032. doi: 10.1016/j.cclet.2019.12.007 shu

Microwave-assisted hydrothermal synthesis of Pt/SnO₂ gas sensor for CO detection

Wang Qingji ^a,*, ,
Bao Liwen ^a ,
Cao Zongqiang ^a ,
Li Chaoyang ^a ,
Li Xu ^b,*, ,
Liu Fangmeng ^c ,
Sun Peng ^c ,
Lu Geyu ^c,*,

a.
State Key Laboratory of Marine Resource Utilization in South China Sea, College of Information and Communication Engineering, Hainan University, Haikou 570228, China
b.
School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China
c.
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

wangqingji@hainanu.edu.cn

lixu@gdut.edu.cn

lugy@jlu.edu.cn

Received Date: 12 October 2019
Revised Date: 26 November 2019
Accepted Date: 27 November 2019
Available Online: 3 December 2019

Figures(5)

In this paper, the Pt/SnO₂ nanostructures were prepared via a facile one-step microwave assisted hydrothermal route. The structure of the introduced Pt/SnO₂ and its gas-sensing properties toward CO were investigated. The results from the TEM test reveal that Pt grows on the SnO₂ nanostructure, which was not found for bulk in this situ method, constructing Pt/SnO₂. The results indicated that the sensor using 3.0 wt% Pt/SnO₂ to 100 ppm carbon monoxide performed a superior sensing properties compared to 1.5 wt% and 4.5 wt% Pt/SnO₂ at 225 ℃. The response time of 3.0 wt% sensor is 16 s to 100 ppm CO at 225 ℃. Such enhanced gas sensing performances could be attributed to the chemical and electrical factors. In view of chemical factors, the presence of Pt facilitates the surface reaction, which will improve the gas sensing properties. With respect to the electrical factors, the Pt/SnO₂ plays roles in increasing the sensor's response due to its characteristic configuration. In addition, the one-step in situ microwave assisted process provides a promising and versatile choice for the preparation of gas sensing materials.
- Microwave assisted hydrothermal method,
- SnO₂,
- Pt,
- CO,
- Gas sensor
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Microwave-assisted hydrothermal synthesis of Pt/SnO2 gas sensor for CO detection

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Microwave-assisted hydrothermal synthesis of Pt/SnO₂ gas sensor for CO detection