Enhanced Photocatalytic Activity of WS2 Film by Laser Drilling to Produce Porous WS2/WO3 Heterostructure

Abstract Methods and mechanisms for improvement of photocatalytic activity, are important and popular research topics for renewable energy production and waste water treatment. Here, we demonstrate a facile laser drilling method for engineering well-aligned pore arrays on magnetron-sputtered WS2 nan...

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Autores principales:	Sainan Ma, Longlui Zeng, Lili Tao, Chun Yin Tang, Huiyu Yuan, Hui Long, Ping Kwong Cheng, Yang Chai, Chuansheng Chen, Kin Hung Fung, Xuming Zhang, Shu Ping Lau, Yuen Hong Tsang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b326c921cf3340c7a4843744d27b45a2
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spelling	oai:doaj.org-article:b326c921cf3340c7a4843744d27b45a22021-12-02T15:05:54ZEnhanced Photocatalytic Activity of WS2 Film by Laser Drilling to Produce Porous WS2/WO3 Heterostructure10.1038/s41598-017-03254-22045-2322https://doaj.org/article/b326c921cf3340c7a4843744d27b45a22017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03254-2https://doaj.org/toc/2045-2322Abstract Methods and mechanisms for improvement of photocatalytic activity, are important and popular research topics for renewable energy production and waste water treatment. Here, we demonstrate a facile laser drilling method for engineering well-aligned pore arrays on magnetron-sputtered WS2 nanofilms with increased active edge sites; the proposed method promotes partial oxidation to fabricate WS2/WO3 heterojunctions that enhance the separation of photogenerated electron-hole pairs. The WS2 film after one, two, and three treatments exhibited photocurrent density of 3.9, 6.2, and 8 μA/cm2, respectively, reaching up to 31 times larger than that of pristine WS2 film along with greatly improved charge recombination kinetics. The unprecedented combinational roles of laser drilling revealed in this study in regards to geometric tailoring, chemical transformation, and heterojunction positioning for WS2-based composite nanomaterials create a foundation for further enhancing the performance of other 2D transition metal dichalcogenides in photocatalysis via laser treatment.Sainan MaLonglui ZengLili TaoChun Yin TangHuiyu YuanHui LongPing Kwong ChengYang ChaiChuansheng ChenKin Hung FungXuming ZhangShu Ping LauYuen Hong TsangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sainan Ma Longlui Zeng Lili Tao Chun Yin Tang Huiyu Yuan Hui Long Ping Kwong Cheng Yang Chai Chuansheng Chen Kin Hung Fung Xuming Zhang Shu Ping Lau Yuen Hong Tsang Enhanced Photocatalytic Activity of WS2 Film by Laser Drilling to Produce Porous WS2/WO3 Heterostructure
description	Abstract Methods and mechanisms for improvement of photocatalytic activity, are important and popular research topics for renewable energy production and waste water treatment. Here, we demonstrate a facile laser drilling method for engineering well-aligned pore arrays on magnetron-sputtered WS2 nanofilms with increased active edge sites; the proposed method promotes partial oxidation to fabricate WS2/WO3 heterojunctions that enhance the separation of photogenerated electron-hole pairs. The WS2 film after one, two, and three treatments exhibited photocurrent density of 3.9, 6.2, and 8 μA/cm2, respectively, reaching up to 31 times larger than that of pristine WS2 film along with greatly improved charge recombination kinetics. The unprecedented combinational roles of laser drilling revealed in this study in regards to geometric tailoring, chemical transformation, and heterojunction positioning for WS2-based composite nanomaterials create a foundation for further enhancing the performance of other 2D transition metal dichalcogenides in photocatalysis via laser treatment.
format	article
author	Sainan Ma Longlui Zeng Lili Tao Chun Yin Tang Huiyu Yuan Hui Long Ping Kwong Cheng Yang Chai Chuansheng Chen Kin Hung Fung Xuming Zhang Shu Ping Lau Yuen Hong Tsang
author_facet	Sainan Ma Longlui Zeng Lili Tao Chun Yin Tang Huiyu Yuan Hui Long Ping Kwong Cheng Yang Chai Chuansheng Chen Kin Hung Fung Xuming Zhang Shu Ping Lau Yuen Hong Tsang
author_sort	Sainan Ma
title	Enhanced Photocatalytic Activity of WS2 Film by Laser Drilling to Produce Porous WS2/WO3 Heterostructure
title_short	Enhanced Photocatalytic Activity of WS2 Film by Laser Drilling to Produce Porous WS2/WO3 Heterostructure
title_full	Enhanced Photocatalytic Activity of WS2 Film by Laser Drilling to Produce Porous WS2/WO3 Heterostructure
title_fullStr	Enhanced Photocatalytic Activity of WS2 Film by Laser Drilling to Produce Porous WS2/WO3 Heterostructure
title_full_unstemmed	Enhanced Photocatalytic Activity of WS2 Film by Laser Drilling to Produce Porous WS2/WO3 Heterostructure
title_sort	enhanced photocatalytic activity of ws2 film by laser drilling to produce porous ws2/wo3 heterostructure
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b326c921cf3340c7a4843744d27b45a2
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Enhanced Photocatalytic Activity of WS2 Film by Laser Drilling to Produce Porous WS2/WO3 Heterostructure

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