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

IF 6.5 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Sensors and Actuators Reports Pub Date : 2024-09-30 DOI:10.1016/j.snr.2024.100246

Jiyeon Shin , Jeong Yun Hwang , Changyu Kim , Jimyeong Park , Jong Wook Roh , Sun-Woo Choi , Changhyun Jin , Myung Sik Choi

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Abstract

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 °C and 200 °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 + O₂ reaction). Based on this reference, we investigated SnO₂ NSs of various sizes and functions by adjusting the process variables.

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采用水热法和微波法合成的金装饰二氧化锡纳米球对 H2S 气体传感的增强作用

本研究采用水热法和微波法合成了无取向金装饰二氧化锡纳米球（NSs）。二氧化锡球的尺寸从数百纳米到微米不等。SnO2 NSs 表面吸附金后，表面的氧空位增加，最终与现有金催化剂的溢出效应产生协同效应。具体来说，在 100 °C 和 200 °C 时，对 10 ppm H2S 气体的响应分别提高到 16.14 和 46.81。我们将这些气体传感效应分为两个缺点（氧吸附和同质结合）和五个优点（氧空位、溢出、表面积、H2S + SnO2 反应和 H2S + O2 反应）进行了单独研究。在此基础上，我们通过调整工艺变量，研究了各种尺寸和功能的二氧化锡 NS。

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来源期刊

Sensors and Actuators Reports Multiple-

CiteScore

9.60

自引率

0.00%

发文量

审稿时长

49 days

期刊介绍： Sensors and Actuators Reports is a peer-reviewed open access journal launched out from the Sensors and Actuators journal family. Sensors and Actuators Reports is dedicated to publishing new and original works in the field of all type of sensors and actuators, including bio-, chemical-, physical-, and nano- sensors and actuators, which demonstrates significant progress beyond the current state of the art. The journal regularly publishes original research papers, reviews, and short communications. For research papers and short communications, the journal aims to publish the new and original work supported by experimental results and as such purely theoretical works are not accepted.