NO2Gas Sensing Properties of Ag-Functionalized Porous ZnO Sheets

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

NO₂Gas Sensing Properties of Ag-Functionalized Porous ZnO Sheets

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

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 (Rg/Ra) 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.

Original language	English
Article number	9021169
Journal	Adsorption Science and Technology
Volume	2023
DOIs	https://doi.org/10.1155/2023/9021169
Publication status	Published - 2023

Bibliographical note

Publisher Copyright:
© 2023 Min Young Kim et al.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Surfaces and Interfaces

Access to Document

10.1155/2023/9021169

Cite this

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title = "NO2Gas Sensing Properties of Ag-Functionalized Porous ZnO Sheets",

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 (Rg/Ra) 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.",

author = "Kim, {Min Young} and Hwang, {Jeong Yun} and Ali Mirzaei and Choi, {Sun Woo} and Kim, {Sang Il} and Kim, {Hyun Sik} and Kim, {Sun Jae} and Roh, {Jong Wook} and Choi, {Myung Sik} and Lee, {Kyu Hyoung} and Lee, {Seung Yong} and Changhyun Jin",

note = "Publisher Copyright: {\textcopyright} 2023 Min Young Kim et al.",

year = "2023",

doi = "10.1155/2023/9021169",

language = "English",

volume = "2023",

journal = "Adsorption Science and Technology",

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T1 - NO2Gas Sensing Properties of Ag-Functionalized Porous ZnO Sheets

AU - Kim, Min Young

AU - Hwang, Jeong Yun

AU - Mirzaei, Ali

AU - Choi, Sun Woo

AU - Kim, Sang Il

AU - Kim, Hyun Sik

AU - Kim, Sun Jae

AU - Roh, Jong Wook

AU - Choi, Myung Sik

AU - Lee, Kyu Hyoung

AU - Lee, Seung Yong

AU - Jin, Changhyun

PY - 2023

Y1 - 2023

N2 - 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 (Rg/Ra) 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.

AB - 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 (Rg/Ra) 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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JO - Adsorption Science and Technology

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