Novel FeVO <inf>4</inf> /Bi <inf>7</inf> O <inf>9</inf> I <inf>3</inf> nanocomposite with enhanced photocatalytic dye degradation and photoelectrochemical properties

© 2018 Elsevier B.V. Novel FeVO 4 /Bi 7 O 9 I 3 nanocomposites with different weight percentages (3, 6.25, 12.5, and 25%wt) of FeVO 4 were successfully synthesized by cyclic microwave irradiation, followed by wet impregnation. The applications for photocatalytic dye degradation and photoelectrochem...

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Main Authors: Auttaphon Chachvalvutikul, Jaroon Jakmunee, Somchai Thongtem, Sila Kittiwachana, Sulawan Kaowphong
Format: Journal
Published: 2019
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/63673
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spelling th-cmuir.6653943832-636732020-04-02T15:19:04Z Novel FeVO <inf>4</inf> /Bi <inf>7</inf> O <inf>9</inf> I <inf>3</inf> nanocomposite with enhanced photocatalytic dye degradation and photoelectrochemical properties Auttaphon Chachvalvutikul Jaroon Jakmunee Somchai Thongtem Sila Kittiwachana Sulawan Kaowphong Materials Science Chemistry Physics and Astronomy © 2018 Elsevier B.V. Novel FeVO 4 /Bi 7 O 9 I 3 nanocomposites with different weight percentages (3, 6.25, 12.5, and 25%wt) of FeVO 4 were successfully synthesized by cyclic microwave irradiation, followed by wet impregnation. The applications for photocatalytic dye degradation and photoelectrochemical (PEC) were investigated. The 6.25%wt-FeVO 4 /Bi 7 O 9 I 3 nanocomposite exhibited excellent photocatalytic degradation of methylene blue, rhodamine B, and methyl orange with decolorization efficiencies of 81.3%, 98.9%, and 94.9% within 360 min, respectively. Moreover, this nanocomposite possessed excellent reusability and stability during the photocatalytic degradation process. PEC performance in water oxidation of the 6.25%wt-FeVO 4 /Bi 7 O 9 I 3 photoanode was evaluated by linear sweep voltammetry (LSV) measurement. Enhanced PEC performance with photocurrent density of 0.029 mA cm −2 at 1.23 V (vs. RHE) was observed under visible-light irradiation, which was ca. 3.7 times higher than that of the pure Bi 7 O 9 I 3 . Based on the optical characterization, energy band positions, and active species trapping experiments, a possible photocatalytic mechanism of the FeVO 4 /Bi 7 O 9 I 3 heterojunction was discussed. The enhancement in the photocatalytic and the PEC performance ascribed to synergistic effects of visible-light absorption and a favorable “type II heterojunction” structure of the FeVO 4 /Bi 7 O 9 I 3 nanocomposite. These were the main effects that promoted the photogenerated electrons and holes transfer across the contact interface between FeVO 4 and Bi 7 O 9 I 3 , as well as suppressed the recombination of photogenerated electron-hole pairs and facilitated charge separation and transportation. 2019-03-18T02:23:36Z 2019-03-18T02:23:36Z 2019-05-01 Journal 01694332 2-s2.0-85059241166 10.1016/j.apsusc.2018.12.214 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85059241166&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/63673
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Materials Science
Chemistry
Physics and Astronomy
spellingShingle Materials Science
Chemistry
Physics and Astronomy
Auttaphon Chachvalvutikul
Jaroon Jakmunee
Somchai Thongtem
Sila Kittiwachana
Sulawan Kaowphong
Novel FeVO <inf>4</inf> /Bi <inf>7</inf> O <inf>9</inf> I <inf>3</inf> nanocomposite with enhanced photocatalytic dye degradation and photoelectrochemical properties
description © 2018 Elsevier B.V. Novel FeVO 4 /Bi 7 O 9 I 3 nanocomposites with different weight percentages (3, 6.25, 12.5, and 25%wt) of FeVO 4 were successfully synthesized by cyclic microwave irradiation, followed by wet impregnation. The applications for photocatalytic dye degradation and photoelectrochemical (PEC) were investigated. The 6.25%wt-FeVO 4 /Bi 7 O 9 I 3 nanocomposite exhibited excellent photocatalytic degradation of methylene blue, rhodamine B, and methyl orange with decolorization efficiencies of 81.3%, 98.9%, and 94.9% within 360 min, respectively. Moreover, this nanocomposite possessed excellent reusability and stability during the photocatalytic degradation process. PEC performance in water oxidation of the 6.25%wt-FeVO 4 /Bi 7 O 9 I 3 photoanode was evaluated by linear sweep voltammetry (LSV) measurement. Enhanced PEC performance with photocurrent density of 0.029 mA cm −2 at 1.23 V (vs. RHE) was observed under visible-light irradiation, which was ca. 3.7 times higher than that of the pure Bi 7 O 9 I 3 . Based on the optical characterization, energy band positions, and active species trapping experiments, a possible photocatalytic mechanism of the FeVO 4 /Bi 7 O 9 I 3 heterojunction was discussed. The enhancement in the photocatalytic and the PEC performance ascribed to synergistic effects of visible-light absorption and a favorable “type II heterojunction” structure of the FeVO 4 /Bi 7 O 9 I 3 nanocomposite. These were the main effects that promoted the photogenerated electrons and holes transfer across the contact interface between FeVO 4 and Bi 7 O 9 I 3 , as well as suppressed the recombination of photogenerated electron-hole pairs and facilitated charge separation and transportation.
format Journal
author Auttaphon Chachvalvutikul
Jaroon Jakmunee
Somchai Thongtem
Sila Kittiwachana
Sulawan Kaowphong
author_facet Auttaphon Chachvalvutikul
Jaroon Jakmunee
Somchai Thongtem
Sila Kittiwachana
Sulawan Kaowphong
author_sort Auttaphon Chachvalvutikul
title Novel FeVO <inf>4</inf> /Bi <inf>7</inf> O <inf>9</inf> I <inf>3</inf> nanocomposite with enhanced photocatalytic dye degradation and photoelectrochemical properties
title_short Novel FeVO <inf>4</inf> /Bi <inf>7</inf> O <inf>9</inf> I <inf>3</inf> nanocomposite with enhanced photocatalytic dye degradation and photoelectrochemical properties
title_full Novel FeVO <inf>4</inf> /Bi <inf>7</inf> O <inf>9</inf> I <inf>3</inf> nanocomposite with enhanced photocatalytic dye degradation and photoelectrochemical properties
title_fullStr Novel FeVO <inf>4</inf> /Bi <inf>7</inf> O <inf>9</inf> I <inf>3</inf> nanocomposite with enhanced photocatalytic dye degradation and photoelectrochemical properties
title_full_unstemmed Novel FeVO <inf>4</inf> /Bi <inf>7</inf> O <inf>9</inf> I <inf>3</inf> nanocomposite with enhanced photocatalytic dye degradation and photoelectrochemical properties
title_sort novel fevo <inf>4</inf> /bi <inf>7</inf> o <inf>9</inf> i <inf>3</inf> nanocomposite with enhanced photocatalytic dye degradation and photoelectrochemical properties
publishDate 2019
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85059241166&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/63673
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