A novel CuInS<inf>2</inf>/m-BiVO<inf>4</inf> p-n heterojunction photocatalyst with enhanced visible-light photocatalytic activity

© 2019 Elsevier B.V. Novel CuInS2/m-BiVO4 composites with different mass ratios (CuInS2 to m-BiVO4 = 1:3, 1:1, and 3:1) were synthesized and their potential visible-light photocatalytic applications for photodegradation of some organic dyes (methylene blue, rhodamine B, and methyl orange) and inacti...

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Main Authors: Sulawan Kaowphong, Wimonnat Choklap, Auttaphon Chachvalvutikul, Nopakarn Chandet
Format: Journal
Published: 2019
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/65449
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spelling th-cmuir.6653943832-654492019-08-05T04:43:05Z A novel CuInS<inf>2</inf>/m-BiVO<inf>4</inf> p-n heterojunction photocatalyst with enhanced visible-light photocatalytic activity Sulawan Kaowphong Wimonnat Choklap Auttaphon Chachvalvutikul Nopakarn Chandet Chemical Engineering Chemistry Physics and Astronomy © 2019 Elsevier B.V. Novel CuInS2/m-BiVO4 composites with different mass ratios (CuInS2 to m-BiVO4 = 1:3, 1:1, and 3:1) were synthesized and their potential visible-light photocatalytic applications for photodegradation of some organic dyes (methylene blue, rhodamine B, and methyl orange) and inactivation of bacteria (Pseudomonas aeruginosa) were investigated. CuInS2/m-BiVO4 with a mass ratio of 1:3 exhibited better photocatalytic degradation of methylene blue and antibacterial activity than those of either pure CuInS2 or m-BiVO4. Moreover, this composite photocatalyst showed different photocatalytic selectivity in terms of the organic dye degradation. Salicylic acid was also used to test the photocatalytic activity of this composite to clarify the dye sensitization effect. The photoelectrochemical (PEC) properties of the CuInS2/m-BiVO4 photoelectrode, evaluated by linear sweep voltammetry (LSV) measurement, revealed that the composite photoelectrode exhibited higher current density and onset potential in comparison with the m-BiVO4 photoelectrode. In addition, the electrochemical impedance spectroscopy (EIS) measurement also proved a faster rate of charge transfer at the electrode/electrolyte interface. The enhancement of photocatalytic and PEC activities of the CuInS2/m-BiVO4 composite was revealed not only that the CuInS2/m-BiVO4 composite extended light absorption in the visible light region, but also that the formation of a p-n heterojunction could promote photogenerated charges as well as facilitate effective charge separation and transportation between the CuInS2 and m-BiVO4 contact interface. 2019-08-05T04:33:33Z 2019-08-05T04:33:33Z 2019-10-20 Journal 18734359 09277757 2-s2.0-85068938779 10.1016/j.colsurfa.2019.123639 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85068938779&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/65449
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Chemical Engineering
Chemistry
Physics and Astronomy
spellingShingle Chemical Engineering
Chemistry
Physics and Astronomy
Sulawan Kaowphong
Wimonnat Choklap
Auttaphon Chachvalvutikul
Nopakarn Chandet
A novel CuInS<inf>2</inf>/m-BiVO<inf>4</inf> p-n heterojunction photocatalyst with enhanced visible-light photocatalytic activity
description © 2019 Elsevier B.V. Novel CuInS2/m-BiVO4 composites with different mass ratios (CuInS2 to m-BiVO4 = 1:3, 1:1, and 3:1) were synthesized and their potential visible-light photocatalytic applications for photodegradation of some organic dyes (methylene blue, rhodamine B, and methyl orange) and inactivation of bacteria (Pseudomonas aeruginosa) were investigated. CuInS2/m-BiVO4 with a mass ratio of 1:3 exhibited better photocatalytic degradation of methylene blue and antibacterial activity than those of either pure CuInS2 or m-BiVO4. Moreover, this composite photocatalyst showed different photocatalytic selectivity in terms of the organic dye degradation. Salicylic acid was also used to test the photocatalytic activity of this composite to clarify the dye sensitization effect. The photoelectrochemical (PEC) properties of the CuInS2/m-BiVO4 photoelectrode, evaluated by linear sweep voltammetry (LSV) measurement, revealed that the composite photoelectrode exhibited higher current density and onset potential in comparison with the m-BiVO4 photoelectrode. In addition, the electrochemical impedance spectroscopy (EIS) measurement also proved a faster rate of charge transfer at the electrode/electrolyte interface. The enhancement of photocatalytic and PEC activities of the CuInS2/m-BiVO4 composite was revealed not only that the CuInS2/m-BiVO4 composite extended light absorption in the visible light region, but also that the formation of a p-n heterojunction could promote photogenerated charges as well as facilitate effective charge separation and transportation between the CuInS2 and m-BiVO4 contact interface.
format Journal
author Sulawan Kaowphong
Wimonnat Choklap
Auttaphon Chachvalvutikul
Nopakarn Chandet
author_facet Sulawan Kaowphong
Wimonnat Choklap
Auttaphon Chachvalvutikul
Nopakarn Chandet
author_sort Sulawan Kaowphong
title A novel CuInS<inf>2</inf>/m-BiVO<inf>4</inf> p-n heterojunction photocatalyst with enhanced visible-light photocatalytic activity
title_short A novel CuInS<inf>2</inf>/m-BiVO<inf>4</inf> p-n heterojunction photocatalyst with enhanced visible-light photocatalytic activity
title_full A novel CuInS<inf>2</inf>/m-BiVO<inf>4</inf> p-n heterojunction photocatalyst with enhanced visible-light photocatalytic activity
title_fullStr A novel CuInS<inf>2</inf>/m-BiVO<inf>4</inf> p-n heterojunction photocatalyst with enhanced visible-light photocatalytic activity
title_full_unstemmed A novel CuInS<inf>2</inf>/m-BiVO<inf>4</inf> p-n heterojunction photocatalyst with enhanced visible-light photocatalytic activity
title_sort novel cuins<inf>2</inf>/m-bivo<inf>4</inf> p-n heterojunction photocatalyst with enhanced visible-light photocatalytic activity
publishDate 2019
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85068938779&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/65449
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