Effects of reduced graphene oxide loading on gas-sensing characteristics of flame-made Bi<inf>2</inf>WO<inf>6</inf> nanoparticles

© 2019 Elsevier B.V. In this study, the effects of reduced graphene oxide (rGO) loading on the gas-sensing characteristics of flame-made Bi2WO6 nanoparticles were systematically investigated. Bi2WO6 nanoparticles produced by flame spray pyrolysis (FSP) were loaded with rGO prepared based on Hummer&#...

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Main Authors: Ketkaeo Bunpang, Anurat Wisitsoraat, Adisorn Tuantranont, Sukon Phanichphant, Chaikarn Liewhiran
Format: Journal
Published: 2019
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/66620
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-666202019-09-16T12:59:43Z Effects of reduced graphene oxide loading on gas-sensing characteristics of flame-made Bi<inf>2</inf>WO<inf>6</inf> nanoparticles Ketkaeo Bunpang Anurat Wisitsoraat Adisorn Tuantranont Sukon Phanichphant Chaikarn Liewhiran Chemistry Materials Science Physics and Astronomy © 2019 Elsevier B.V. In this study, the effects of reduced graphene oxide (rGO) loading on the gas-sensing characteristics of flame-made Bi2WO6 nanoparticles were systematically investigated. Bi2WO6 nanoparticles produced by flame spray pyrolysis (FSP) were loaded with rGO prepared based on Hummer's method with varying concentrations from 0 to 5 wt%. Characterized results by X-Ray diffraction, scanning and transmission electron microscopy, energy dispersive spectroscopy, Raman spectroscopy, X-ray photoemission spectroscopy and nitrogen adsorption confirmed the dispersion of rGO sheets within 5–15 nm FSP-made orthorhombic Bi2WO6 nanoparticles. The gas-sensing data measured in dry air demonstrated that the optimal rGO loading level of 2 wt% provided substantial enhancements of H2S response and selectivity. Specifically, the 2 wt% rGO-loaded Bi2WO6 sensor exhibited the highest response of ~29 towards 10 ppm H2S with high selectivity against H2, CH4, NO, NO2, C7H8, CH2O, C8H10, C6H6, C3H6O, CH3OH, C2H5OH, C3H6O2, C3H6O3, C4H8O2, CH3COOH, C4H9COOH and HCOOH at an optimal working temperature of 350 °C. The roles of rGO on gas-sensing behaviors were explained on the basis of p-n heterojunctions between rGO and Bi2WO6. Therefore, the rGO-loaded Bi2WO6 sensor is an attractive candidate for H2S detection. 2019-09-16T12:49:17Z 2019-09-16T12:49:17Z 2019-12-01 Journal 01694332 2-s2.0-85071044459 10.1016/j.apsusc.2019.143613 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85071044459&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/66620
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Chemistry
Materials Science
Physics and Astronomy
spellingShingle Chemistry
Materials Science
Physics and Astronomy
Ketkaeo Bunpang
Anurat Wisitsoraat
Adisorn Tuantranont
Sukon Phanichphant
Chaikarn Liewhiran
Effects of reduced graphene oxide loading on gas-sensing characteristics of flame-made Bi<inf>2</inf>WO<inf>6</inf> nanoparticles
description © 2019 Elsevier B.V. In this study, the effects of reduced graphene oxide (rGO) loading on the gas-sensing characteristics of flame-made Bi2WO6 nanoparticles were systematically investigated. Bi2WO6 nanoparticles produced by flame spray pyrolysis (FSP) were loaded with rGO prepared based on Hummer's method with varying concentrations from 0 to 5 wt%. Characterized results by X-Ray diffraction, scanning and transmission electron microscopy, energy dispersive spectroscopy, Raman spectroscopy, X-ray photoemission spectroscopy and nitrogen adsorption confirmed the dispersion of rGO sheets within 5–15 nm FSP-made orthorhombic Bi2WO6 nanoparticles. The gas-sensing data measured in dry air demonstrated that the optimal rGO loading level of 2 wt% provided substantial enhancements of H2S response and selectivity. Specifically, the 2 wt% rGO-loaded Bi2WO6 sensor exhibited the highest response of ~29 towards 10 ppm H2S with high selectivity against H2, CH4, NO, NO2, C7H8, CH2O, C8H10, C6H6, C3H6O, CH3OH, C2H5OH, C3H6O2, C3H6O3, C4H8O2, CH3COOH, C4H9COOH and HCOOH at an optimal working temperature of 350 °C. The roles of rGO on gas-sensing behaviors were explained on the basis of p-n heterojunctions between rGO and Bi2WO6. Therefore, the rGO-loaded Bi2WO6 sensor is an attractive candidate for H2S detection.
format Journal
author Ketkaeo Bunpang
Anurat Wisitsoraat
Adisorn Tuantranont
Sukon Phanichphant
Chaikarn Liewhiran
author_facet Ketkaeo Bunpang
Anurat Wisitsoraat
Adisorn Tuantranont
Sukon Phanichphant
Chaikarn Liewhiran
author_sort Ketkaeo Bunpang
title Effects of reduced graphene oxide loading on gas-sensing characteristics of flame-made Bi<inf>2</inf>WO<inf>6</inf> nanoparticles
title_short Effects of reduced graphene oxide loading on gas-sensing characteristics of flame-made Bi<inf>2</inf>WO<inf>6</inf> nanoparticles
title_full Effects of reduced graphene oxide loading on gas-sensing characteristics of flame-made Bi<inf>2</inf>WO<inf>6</inf> nanoparticles
title_fullStr Effects of reduced graphene oxide loading on gas-sensing characteristics of flame-made Bi<inf>2</inf>WO<inf>6</inf> nanoparticles
title_full_unstemmed Effects of reduced graphene oxide loading on gas-sensing characteristics of flame-made Bi<inf>2</inf>WO<inf>6</inf> nanoparticles
title_sort effects of reduced graphene oxide loading on gas-sensing characteristics of flame-made bi<inf>2</inf>wo<inf>6</inf> nanoparticles
publishDate 2019
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85071044459&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/66620
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