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
{"title":"NO2 Gas Sensing Properties of Ag-Functionalized Porous ZnO Sheets","authors":"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","doi":"10.1155/2023/9021169","DOIUrl":null,"url":null,"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 ( <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M1\"> <msub> <mrow> <mi>R</mi> </mrow> <mrow> <mi>g</mi> </mrow> </msub> </math> / <math xmlns=\"http://www.w3.org/1998/Math/MathML\" id=\"M2\"> <msub> <mrow> <mi>R</mi> </mrow> <mrow> <mi>a</mi> </mrow> </msub> </math> ) 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.","PeriodicalId":7315,"journal":{"name":"Adsorption Science & Technology","volume":"41 1","pages":"0"},"PeriodicalIF":2.8000,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Adsorption Science & Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1155/2023/9021169","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
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 ( / ) 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.
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。
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.