Nanostructured iron vanadate photoanodes with enhanced visible absorption and charge separation

Nanostructuring has been an effective method to improve the charge separation of semiconductors with poor charge transport properties. FeVO4is a promising photoanode with a band gap of ∼2.1 eV, theoretical photocurrent of 13 mA cm-1, and solar-to-hydrogen efficiency of up to 16%. However, its photoe...

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Main Authors: Zhang, Mengyuan, Fang, Yanan, Tay, Ying Fan, Liu, Yuan, Wang, Liying, Jani, Hariom, Abdi, Fatwa F., Wong, Lydia Helena
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/162424
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1624242022-10-18T08:01:53Z Nanostructured iron vanadate photoanodes with enhanced visible absorption and charge separation Zhang, Mengyuan Fang, Yanan Tay, Ying Fan Liu, Yuan Wang, Liying Jani, Hariom Abdi, Fatwa F. Wong, Lydia Helena School of Materials Science and Engineering Engineering::Materials Iron Vanadate Nanostructure Nanostructuring has been an effective method to improve the charge separation of semiconductors with poor charge transport properties. FeVO4is a promising photoanode with a band gap of ∼2.1 eV, theoretical photocurrent of 13 mA cm-1, and solar-to-hydrogen efficiency of up to 16%. However, its photoelectrochemical (PEC) activity is limited by the low charge transport properties. In this report, a two-step synthesis method is found to control the growth of FeVO4photoanodes to become a nanorod or film. Nanostructured FeVO4is demonstrated to achieve higher photocurrent density due to the higher charge separation efficiency and enlarged absorption range. In addition, the band gap of FeVO4nanorods has decreased by 0.16 eV, which is attributed to the formation of vanadium vacancy, as supported by calculation results. This work demonstrates that nanostructuring and vacancy incorporation synergistically improve the PEC performance of FeVO4-based photoanodes. Ministry of Education (MOE) This work was supported by the Singapore Ministry of Education (MOE) Tier 2 grant (MOE2016T21030) and Tier 1 grant [2020-T1-001-147 (RG64/20)]. 2022-10-18T08:01:39Z 2022-10-18T08:01:39Z 2022 Journal Article Zhang, M., Fang, Y., Tay, Y. F., Liu, Y., Wang, L., Jani, H., Abdi, F. F. & Wong, L. H. (2022). Nanostructured iron vanadate photoanodes with enhanced visible absorption and charge separation. ACS Applied Energy Materials, 5(3), 3409-3416. https://dx.doi.org/10.1021/acsaem.1c04004 2574-0962 https://hdl.handle.net/10356/162424 10.1021/acsaem.1c04004 2-s2.0-85126732914 3 5 3409 3416 en MOE2016T21030 2020-T1-001-147 (RG64/20) ACS Applied Energy Materials © 2022 American Chemical Society. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
Iron Vanadate
Nanostructure
spellingShingle Engineering::Materials
Iron Vanadate
Nanostructure
Zhang, Mengyuan
Fang, Yanan
Tay, Ying Fan
Liu, Yuan
Wang, Liying
Jani, Hariom
Abdi, Fatwa F.
Wong, Lydia Helena
Nanostructured iron vanadate photoanodes with enhanced visible absorption and charge separation
description Nanostructuring has been an effective method to improve the charge separation of semiconductors with poor charge transport properties. FeVO4is a promising photoanode with a band gap of ∼2.1 eV, theoretical photocurrent of 13 mA cm-1, and solar-to-hydrogen efficiency of up to 16%. However, its photoelectrochemical (PEC) activity is limited by the low charge transport properties. In this report, a two-step synthesis method is found to control the growth of FeVO4photoanodes to become a nanorod or film. Nanostructured FeVO4is demonstrated to achieve higher photocurrent density due to the higher charge separation efficiency and enlarged absorption range. In addition, the band gap of FeVO4nanorods has decreased by 0.16 eV, which is attributed to the formation of vanadium vacancy, as supported by calculation results. This work demonstrates that nanostructuring and vacancy incorporation synergistically improve the PEC performance of FeVO4-based photoanodes.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Zhang, Mengyuan
Fang, Yanan
Tay, Ying Fan
Liu, Yuan
Wang, Liying
Jani, Hariom
Abdi, Fatwa F.
Wong, Lydia Helena
format Article
author Zhang, Mengyuan
Fang, Yanan
Tay, Ying Fan
Liu, Yuan
Wang, Liying
Jani, Hariom
Abdi, Fatwa F.
Wong, Lydia Helena
author_sort Zhang, Mengyuan
title Nanostructured iron vanadate photoanodes with enhanced visible absorption and charge separation
title_short Nanostructured iron vanadate photoanodes with enhanced visible absorption and charge separation
title_full Nanostructured iron vanadate photoanodes with enhanced visible absorption and charge separation
title_fullStr Nanostructured iron vanadate photoanodes with enhanced visible absorption and charge separation
title_full_unstemmed Nanostructured iron vanadate photoanodes with enhanced visible absorption and charge separation
title_sort nanostructured iron vanadate photoanodes with enhanced visible absorption and charge separation
publishDate 2022
url https://hdl.handle.net/10356/162424
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