Enhancement of xylene gas sensing by using Au core structures in regard to Au@SnO2 core-shell nanocomposites
- Authors
- Yu, Dong Jae; Oum, Wansik; Mirzaei, Ali; Shin, Ka Yoon; Kim, Eun Bi; Kim, Hyeong Min; Kim, Sang Sub; Kim, Hyoun Woo
- Issue Date
- Oct-2023
- Publisher
- Elsevier B.V.
- Keywords
- Au@SnO< sub> 2< /sub> ; Core-shell; Gas sensor; Sensing mechanism; Xylene
- Citation
- Sensors and Actuators B: Chemical, v.392, pp.1 - 14
- Indexed
- SCIE
SCOPUS
- Journal Title
- Sensors and Actuators B: Chemical
- Volume
- 392
- Start Page
- 1
- End Page
- 14
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/193101
- DOI
- 10.1016/j.snb.2023.134018
- ISSN
- 0925-4005
- Abstract
- We prepared pristine SnO2 nanoparticles (NPs) and Au@SnO2 core-shell (C-S) nanocomposites for xylene gas sensing. A simple chemical synthesis was used to synthesize Au@SnO2 C-S nanocomposites. Xylene sensing measurements showed that the response of Au@SnO2 C-S nanocomposites was better than that of pristine SnO2 nanoparticles (NPs), demonstrating promising effects of Au@SnO2 C-S structure for xylene sensing. At 350 °C, it disclosed a good response of 27.9 (50 ppm) to xylene, and the best response of SnO2 to 50 ppm of this gas was 13.04 at 450 °C. Furthermore, Au@SnO2 C-S nanocomposites showed better selectivity to xylene compared to pristine SnO2 NPs. The Au catalytic effect and the generation of Au-SnO2 Schottky barriers and a special structure of Au@SnO2 C-S nanocomposite with high porosity were accounted for via the high-performance Au@SnO2 C-S gas sensor. The results achieved here highlight the promising combination of Au and SnO2 for xylene sensing.
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