H2S gas sensing enhancement of Au-decorated SnO2 nanospheres synthesized using hydrothermal and microwave methods

被引：1

作者：

Shin, Jiyeon ^{[1
]}

Hwang, Jeong Yun ^{[2
]}

Kim, Changyu ^{[3
]}

Park, Jimyeong ^{[3
]}

Roh, Jong Wook ^{[3
]}

Choi, Sun-Woo ^{[4
]}

Jin, Changhyun ^{[2
]}

Choi, Myung Sik ^{[1
,3
]}

机构：

[1] Kyungpook Natl Univ, Sch Adv Sci & Technol Convergence, Sangju 37224, South Korea

[2] Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea

[3] Kyungpook Natl Univ, Dept Nano & Adv Mat Sci & Engn, Sangju 37224, South Korea

[4] Kangwon Natl Univ, Dept Mat Sci & Engn, Samcheok 25912, South Korea

来源：

SENSORS AND ACTUATORS REPORTS | 2024年 / 8卷

基金：

新加坡国家研究基金会;

关键词：

Au; Catalyst; H2S; Gas sensor; SnO2; nanosphere;

D O I：

10.1016/j.snr.2024.100246

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

In this study, non-oriented Au-decorated SnO2 nanospheres (NSs) were synthesized using hydrothermal and microwave methods. The SnO2 spheres ranged from hundreds of nanometers to a microscale. The oxygen vacancy on the surface increased after Au adsorption on the surface of the SnO2 NSs, ultimately showing a synergistic effect with the spillover effect of the existing Au catalyst. Specifically, at 100 degrees C and 200 degrees C, the response to 10 ppm H2S gas improved to 16.14 and 46.81, respectively. These gas sensing effects were approached individually by being divided into two disadvantages (oxygen adsorption and homojunction) and five advantages (oxygen vacancies, spill-over, surface area, H2S + SnO2 reaction, and H2S + O-2 reaction). Based on this reference, we investigated SnO2 NSs of various sizes and functions by adjusting the process variables.

引用

页数：9

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