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WO 3 nanofibrous backbone scaffolds for enhanced optical absorbance and charge transport in metal oxide (Fe 2 O 3 , BiVO 4 ) semiconductor photoanodes towards solar fuel generation

Junghyun Choi, Taeseup Song, Jiseok Kwon, Sangkyu Lee, Hyungkyu Han, Nitish Roy, Chiaki Terashima, Akira Fujishima, Ungyu Paik, Sudhagar Pitchaimuthu Orcid Logo

Applied Surface Science, Volume: 447, Pages: 331 - 337

Swansea University Author: Sudhagar Pitchaimuthu Orcid Logo

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DOI (Published version): 10.1016/j.apsusc.2018.03.167

Abstract

Producing clean fuel (O2 and H2) using semiconductors through solar driven water splitting process has been considered as a promising technology to mitigate the existing environmental issues. Unlike the conventional single photoabsorbers, heterostructured semiconductors exhibit the merits of improve...

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Published in: Applied Surface Science
ISSN: 01694332
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa39190
first_indexed 2018-03-23T20:10:53Z
last_indexed 2018-05-14T19:26:31Z
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spelling 2018-05-14T14:43:03.6297977 v2 39190 2018-03-23 WO 3 nanofibrous backbone scaffolds for enhanced optical absorbance and charge transport in metal oxide (Fe 2 O 3 , BiVO 4 ) semiconductor photoanodes towards solar fuel generation 2fdbee02f4bfc5a1b174c8bd04afbd2b 0000-0001-9098-8806 Sudhagar Pitchaimuthu Sudhagar Pitchaimuthu true false 2018-03-23 Producing clean fuel (O2 and H2) using semiconductors through solar driven water splitting process has been considered as a promising technology to mitigate the existing environmental issues. Unlike the conventional single photoabsorbers, heterostructured semiconductors exhibit the merits of improved solar light photon harvesting and rapid charge separation, which are anticipated to result in high quantum yield of solar fuel generation in photoelectrochemical (PEC) cells. In this report, we demonstrate the electrospun derived WO3 backbone fibrous channel as heteropartner to the primary photoabsorber (Fe2O3 and BiVO4) for promoting the electron transport from charge injection point to charge collector as well as photoholes to the electrolyte. We examine structure, optical, photoelectrochemical and charge transfer property of Fe2O3/WO3 and BiVO4/WO3 electrodes. These results were compared with directly coated Fe2O3 and BiVO4 photoabsorber onto conducting substrate without WO3 backbone. The optical results showed that the absorbance and visible light activity of Fe2O3 and BiVO4 is significantly improved by WO3 backbone fibers due to high amount of photo absorber loading. In addition, one dimensional (1-D) WO3 fibers beneficially enhance the optical path length to the photoanode through light scattering mechanism. The electrochemical impedance analysis exhibits WO3 nanofiber backbone reduces charge transfer resistance at Fe2O3 and BiVO4 by rapid charge collection and charge separation compare to backbone-free Fe2O3 and BiVO4. As a result, Fe2O3/WO3 and BiVO4/WO3 fibrous hetero interface structures showed fourfold higher photocurrent generation from PEC cell. Journal Article Applied Surface Science 447 331 337 01694332 Photoelectrocatalyst; WO3 fiber; Fe2O3; BiVO4; Electrochemical impedance; Solar fuel 31 12 2018 2018-12-31 10.1016/j.apsusc.2018.03.167 COLLEGE NANME COLLEGE CODE Swansea University 2018-05-14T14:43:03.6297977 2018-03-23T14:15:39.9761779 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Junghyun Choi 1 Taeseup Song 2 Jiseok Kwon 3 Sangkyu Lee 4 Hyungkyu Han 5 Nitish Roy 6 Chiaki Terashima 7 Akira Fujishima 8 Ungyu Paik 9 Sudhagar Pitchaimuthu 0000-0001-9098-8806 10 0039190-23032018141807.pdf choi2018(2).pdf 2018-03-23T14:18:07.7100000 Output 1451649 application/pdf Accepted Manuscript true 2019-03-22T00:00:00.0000000 true eng
title WO 3 nanofibrous backbone scaffolds for enhanced optical absorbance and charge transport in metal oxide (Fe 2 O 3 , BiVO 4 ) semiconductor photoanodes towards solar fuel generation
spellingShingle WO 3 nanofibrous backbone scaffolds for enhanced optical absorbance and charge transport in metal oxide (Fe 2 O 3 , BiVO 4 ) semiconductor photoanodes towards solar fuel generation
Sudhagar Pitchaimuthu
title_short WO 3 nanofibrous backbone scaffolds for enhanced optical absorbance and charge transport in metal oxide (Fe 2 O 3 , BiVO 4 ) semiconductor photoanodes towards solar fuel generation
title_full WO 3 nanofibrous backbone scaffolds for enhanced optical absorbance and charge transport in metal oxide (Fe 2 O 3 , BiVO 4 ) semiconductor photoanodes towards solar fuel generation
title_fullStr WO 3 nanofibrous backbone scaffolds for enhanced optical absorbance and charge transport in metal oxide (Fe 2 O 3 , BiVO 4 ) semiconductor photoanodes towards solar fuel generation
title_full_unstemmed WO 3 nanofibrous backbone scaffolds for enhanced optical absorbance and charge transport in metal oxide (Fe 2 O 3 , BiVO 4 ) semiconductor photoanodes towards solar fuel generation
title_sort WO 3 nanofibrous backbone scaffolds for enhanced optical absorbance and charge transport in metal oxide (Fe 2 O 3 , BiVO 4 ) semiconductor photoanodes towards solar fuel generation
author_id_str_mv 2fdbee02f4bfc5a1b174c8bd04afbd2b
author_id_fullname_str_mv 2fdbee02f4bfc5a1b174c8bd04afbd2b_***_Sudhagar Pitchaimuthu
author Sudhagar Pitchaimuthu
author2 Junghyun Choi
Taeseup Song
Jiseok Kwon
Sangkyu Lee
Hyungkyu Han
Nitish Roy
Chiaki Terashima
Akira Fujishima
Ungyu Paik
Sudhagar Pitchaimuthu
format Journal article
container_title Applied Surface Science
container_volume 447
container_start_page 331
publishDate 2018
institution Swansea University
issn 01694332
doi_str_mv 10.1016/j.apsusc.2018.03.167
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description Producing clean fuel (O2 and H2) using semiconductors through solar driven water splitting process has been considered as a promising technology to mitigate the existing environmental issues. Unlike the conventional single photoabsorbers, heterostructured semiconductors exhibit the merits of improved solar light photon harvesting and rapid charge separation, which are anticipated to result in high quantum yield of solar fuel generation in photoelectrochemical (PEC) cells. In this report, we demonstrate the electrospun derived WO3 backbone fibrous channel as heteropartner to the primary photoabsorber (Fe2O3 and BiVO4) for promoting the electron transport from charge injection point to charge collector as well as photoholes to the electrolyte. We examine structure, optical, photoelectrochemical and charge transfer property of Fe2O3/WO3 and BiVO4/WO3 electrodes. These results were compared with directly coated Fe2O3 and BiVO4 photoabsorber onto conducting substrate without WO3 backbone. The optical results showed that the absorbance and visible light activity of Fe2O3 and BiVO4 is significantly improved by WO3 backbone fibers due to high amount of photo absorber loading. In addition, one dimensional (1-D) WO3 fibers beneficially enhance the optical path length to the photoanode through light scattering mechanism. The electrochemical impedance analysis exhibits WO3 nanofiber backbone reduces charge transfer resistance at Fe2O3 and BiVO4 by rapid charge collection and charge separation compare to backbone-free Fe2O3 and BiVO4. As a result, Fe2O3/WO3 and BiVO4/WO3 fibrous hetero interface structures showed fourfold higher photocurrent generation from PEC cell.
published_date 2018-12-31T19:22:30Z
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