Ultraviolet-Induced Gas Sensing Performance of Ag/WO3/rGO Nanocomposites for H2S Gas Sensors

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

ACS Applied Electronic Materials Pub Date : 2023-06-18 DOI:10.1021/acsaelm.3c00349

Yanghai Gui*, Jintao Wu, Kuan Tian, Huishi Guo, Xiaoyun Qin, Xiaomei Qin, Xiang Guo*, Canxiang Fang* and Peng Liu,

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引用次数: 4

Abstract

The attention toward cost-effective and high-performance H₂S sensors is increasing due to the growing need for physical health and environmental monitoring. In this paper, Ag/WO₃/reduced graphene oxide (rGO) nanocomposites were synthesized by using a microwave-assisted gas–liquid interfacial method. Nanomaterials with different Ag doping contents were successfully prepared with AgNO₃ as an additive. The Ag/WO₃/rGO sensors exhibit remarkable selectivity toward H₂S, and the gas sensing performances of Ag-doped WO₃/rGO gas sensors are significantly better than those of WO₃/rGO. At 150 °C, the response value of the 10 wt % Ag/WO₃/rGO gas sensor to 100 ppm H₂S is 204.5, which is 7 times higher than that of WO₃/rGO, and the response/recovery time of the sensor is 9/49 s, respectively. Additionally, the gas sensing performance of the sensor is further enhanced under ultraviolet (UV) irradiation. The response value is enhanced to 685.8, which is 3 times higher than that without UV irradiation, and the response/recovery time is reduced to 8/38 s, respectively. The sensing mechanism is also discussed. This work offers a potential application for H₂S detection in environmental monitoring and smart healthcare.

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用于H2S气体传感器的Ag/WO3/rGO纳米复合材料的紫外气敏性能

由于对身体健康和环境监测的需求日益增长，人们越来越关注经济高效的H2S传感器。本文采用微波辅助气液界面法制备了Ag/WO3/还原氧化石墨烯纳米复合材料。以AgNO3为添加剂，成功制备了不同Ag掺杂量的纳米材料。Ag/WO3/rGO传感器对H2S具有显著的选择性，掺Ag的WO3/rGO气体传感器的气敏性能明显优于WO3/rGO。150℃时，10 wt % Ag/WO3/rGO气体传感器对100 ppm H2S的响应值为204.5，是WO3/rGO的7倍，传感器的响应/恢复时间分别为9/49 s。此外，在紫外线照射下，传感器的气体传感性能进一步增强。响应值提高到685.8，比未紫外线照射时提高了3倍，响应/恢复时间分别缩短到8/38 s。并对传感机理进行了讨论。这项工作为H2S检测在环境监测和智能医疗保健中提供了潜在的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico