NO2 Gas Sensing Properties of Ag-Functionalized Porous ZnO Sheets

IF 2.8 4区工程技术 Q2 CHEMISTRY, APPLIED

Adsorption Science & Technology Pub Date : 2023-01-19 DOI:10.1155/2023/9021169

Min Young Kim, Jeong Yun Hwang, Ali Mirzaei, Sun-Woo Choi, Sang-il Kim, Hyun-Sik Kim, Sun-Jae Kim, Jong Wook Roh, Myung Sik Choi, Kyu Hyoung Lee, Seung Yong Lee, Changhyun Jin

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引用次数: 5

Abstract

Herein, we report a simple and scalable synthesis route to prepare Ag-functionalized porous ZnO sheets and their enhanced NO2 gas sensing properties. Porous ZnO sheets functionalized with well-dispersed submicron Ag particles were prepared by using a hydrothermal method-based one-pot synthesis route from Zn and Ag precursors. NO2 gas sensing performance (response, selectivity, response time, and recovery time) was optimized at 200°C in the gas sensor fabricated with 3 at% Ag-functionalized porous ZnO sheets. We demonstrated a response (

R_{g}

R_{a}

) of 17.18 to 10 ppm NO2 gas and also obtained a high response of 14.05 even at 60% relative humidity due to the synergetic effect of improved NO2 gas adsorption in the presence of Ag particles and increased resistance by the formation of Schottky barrier at Ag-ZnO heterojunctions.

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ag功能化多孔ZnO片的NO2气敏性能

在此，我们报告了一种简单且可扩展的合成路线来制备ag功能化的多孔ZnO片及其增强的NO2气敏性能。以锌和银为前驱体，采用水热合成法制备了分散良好的亚微米银功能化的多孔ZnO片材。用3 at% ag功能化多孔ZnO片制备的NO2气敏传感器在200°C下优化了其气敏性能(响应、选择性、响应时间和恢复时间)。我们证明了17.18至10 ppm NO2气体的响应(R g / R a)，并且即使在60%的相对湿度下也获得了14.05的高响应，这是由于Ag颗粒存在时改善NO2气体吸附的协同效应和Ag- zno异质结处形成肖特基势垒增加的电阻。

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

Adsorption Science & Technology 工程技术-工程：化工

CiteScore

5.00

自引率

10.30%

发文量

181

审稿时长

4.5 months

期刊介绍： Adsorption Science & Technology is a peer-reviewed, open access journal devoted to studies of adsorption and desorption phenomena, which publishes original research papers and critical review articles, with occasional special issues relating to particular topics and symposia.