Enhanced photocatalytic performance of WO3-x with oxygen vacancies via heterostructuring

Kunming Pan; Kangning Shan; Shizhong Wei; Kaikai Li; Jiaming Zhu; Sajid Hussain Siyal; Hong Hui Wu

doi:10.1016/j.coco.2019.09.003

Enhanced photocatalytic performance of WO_3-x with oxygen vacancies via heterostructuring

Kunming Pan
, Kangning Shan
, Shizhong Wei
, Kaikai Li
, Jiaming Zhu
, Sajid Hussain Siyal
, Hong Hui Wu^*

^*Corresponding author for this work

Henan University of Science and Technology
Hong Kong Polytechnic University
Dawood University of Engineering & Technology
University of Science and Technology Beijing

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

Oxygen vacancies were introduced into WO_3-x under H₂/Ar reduction atmosphere at high temperatures, accompanied by the change in morphology. The enhanced photocatalytic performance of WO_3-x powders was systematically investigated. With the reduction temperature increasing, WO₃ gradually transformed to the mixture of WO_2.9, WO_2.72 or WO₂, while the corresponding morphologies changed from irregular particles to homogeneous nano-sheets and then to larger nano-rods. The nano-sheet sample containing WO₂ and WO_2.9 exhibits the optimum catalytic activity due to the special heterostructure. In this heterostructure, the conduction band electrons of WO_2.9 can occupy the nearest valence band and subsequently combine with the adjacent internal holes in WO₂, inhibiting the self-recombination of excited electron-hole pairs in WO_2.9 to improve the photocatalytic properties.

Original language	English
Pages (from-to)	106-110
Number of pages	5
Journal	Composites Communications
Volume	16
DOIs	https://doi.org/10.1016/j.coco.2019.09.003
State	Published - Dec 2019
Externally published	Yes

Keywords

Heterostructure
Oxygen vacancies
Photocatalytic properties
WO

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10.1016/j.coco.2019.09.003

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title = "Enhanced photocatalytic performance of WO3-x with oxygen vacancies via heterostructuring",

abstract = "Oxygen vacancies were introduced into WO3-x under H2/Ar reduction atmosphere at high temperatures, accompanied by the change in morphology. The enhanced photocatalytic performance of WO3-x powders was systematically investigated. With the reduction temperature increasing, WO3 gradually transformed to the mixture of WO2.9, WO2.72 or WO2, while the corresponding morphologies changed from irregular particles to homogeneous nano-sheets and then to larger nano-rods. The nano-sheet sample containing WO2 and WO2.9 exhibits the optimum catalytic activity due to the special heterostructure. In this heterostructure, the conduction band electrons of WO2.9 can occupy the nearest valence band and subsequently combine with the adjacent internal holes in WO2, inhibiting the self-recombination of excited electron-hole pairs in WO2.9 to improve the photocatalytic properties.",

keywords = "Heterostructure, Oxygen vacancies, Photocatalytic properties, WO",

author = "Kunming Pan and Kangning Shan and Shizhong Wei and Kaikai Li and Jiaming Zhu and Siyal, \{Sajid Hussain\} and Wu, \{Hong Hui\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = dec,

doi = "10.1016/j.coco.2019.09.003",

language = "英语",

volume = "16",

pages = "106--110",

journal = "Composites Communications",

issn = "2452-2139",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Enhanced photocatalytic performance of WO3-x with oxygen vacancies via heterostructuring

AU - Pan, Kunming

AU - Shan, Kangning

AU - Wei, Shizhong

AU - Li, Kaikai

AU - Zhu, Jiaming

AU - Siyal, Sajid Hussain

AU - Wu, Hong Hui

PY - 2019/12

Y1 - 2019/12

N2 - Oxygen vacancies were introduced into WO3-x under H2/Ar reduction atmosphere at high temperatures, accompanied by the change in morphology. The enhanced photocatalytic performance of WO3-x powders was systematically investigated. With the reduction temperature increasing, WO3 gradually transformed to the mixture of WO2.9, WO2.72 or WO2, while the corresponding morphologies changed from irregular particles to homogeneous nano-sheets and then to larger nano-rods. The nano-sheet sample containing WO2 and WO2.9 exhibits the optimum catalytic activity due to the special heterostructure. In this heterostructure, the conduction band electrons of WO2.9 can occupy the nearest valence band and subsequently combine with the adjacent internal holes in WO2, inhibiting the self-recombination of excited electron-hole pairs in WO2.9 to improve the photocatalytic properties.

AB - Oxygen vacancies were introduced into WO3-x under H2/Ar reduction atmosphere at high temperatures, accompanied by the change in morphology. The enhanced photocatalytic performance of WO3-x powders was systematically investigated. With the reduction temperature increasing, WO3 gradually transformed to the mixture of WO2.9, WO2.72 or WO2, while the corresponding morphologies changed from irregular particles to homogeneous nano-sheets and then to larger nano-rods. The nano-sheet sample containing WO2 and WO2.9 exhibits the optimum catalytic activity due to the special heterostructure. In this heterostructure, the conduction band electrons of WO2.9 can occupy the nearest valence band and subsequently combine with the adjacent internal holes in WO2, inhibiting the self-recombination of excited electron-hole pairs in WO2.9 to improve the photocatalytic properties.

KW - Heterostructure

KW - Oxygen vacancies

KW - Photocatalytic properties

KW - WO

UR - https://www.scopus.com/pages/publications/85072173161

U2 - 10.1016/j.coco.2019.09.003

DO - 10.1016/j.coco.2019.09.003

M3 - 文章

AN - SCOPUS:85072173161

SN - 2452-2139

VL - 16

SP - 106

EP - 110

JO - Composites Communications

JF - Composites Communications

ER -

Enhanced photocatalytic performance of WO_3-x with oxygen vacancies via heterostructuring

Abstract

Keywords

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