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Tungsten oxide quantum dots deposited onto ultrathin CdIn2S4 nanosheets for efficient S-scheme photocatalytic CO2 reduction via cascade charge transfer

Zhang, Zhenzong ; Cao, Yuxin ; Zhang, Fenghao ; Li, Wenjie ; Li, Yuanling ; Yu, Han LU ; Wang, Meiyang and Yu, Hongbing (2021) In Chemical Engineering Journal 428.
Abstract

A novel S-scheme photocatalytic heterojunction composite nanomaterial is developed by integrating zero-dimensional WO3 quantum dots (WQDs) on two-dimensional ultrathin CdIn2S4 (CIS) nanosheets with the aim of fostering carrier separation, enhancing the performance of carrier interface transport, minimizing carrier distance transport, and achieving effective photocatalytic CO2 reduction. The composite photocatalyst WQDs/CdIn2S4 (WCIS) allows for the efficient photocatalytic reduction of CO2 to CO and CH4, as shown by product analysis and isotopic measurement. The photogenerated electrons in WQDs recombine with the holes in CIS nanosheets, and the left... (More)

A novel S-scheme photocatalytic heterojunction composite nanomaterial is developed by integrating zero-dimensional WO3 quantum dots (WQDs) on two-dimensional ultrathin CdIn2S4 (CIS) nanosheets with the aim of fostering carrier separation, enhancing the performance of carrier interface transport, minimizing carrier distance transport, and achieving effective photocatalytic CO2 reduction. The composite photocatalyst WQDs/CdIn2S4 (WCIS) allows for the efficient photocatalytic reduction of CO2 to CO and CH4, as shown by product analysis and isotopic measurement. The photogenerated electrons in WQDs recombine with the holes in CIS nanosheets, and the left electrons in CIS have stronger CO2 reduction abilities. The highest yields of CO and CH4 achieved with the WCIS photocatalyst are 8.2 and 1.6 μmol g-1h−1 ––2.6 and 8 times higher than those for CIS, respectively. Moreover, the S-scheme WCIS possesses a stable crystal structure and recycling ability. Finally, the S-scheme charge transfer path on the WCIS composite is proposed according to theoretical calculation, in-situ irradiated X-ray photoelectron spectroscopy, and electron paramagnetic resonance (ESR) analyses.

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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
CdInS, CO reduction, Photocatalysis, S-scheme, WO QDs
in
Chemical Engineering Journal
volume
428
article number
131218
publisher
Elsevier
external identifiers
  • scopus:85111033237
ISSN
1385-8947
DOI
10.1016/j.cej.2021.131218
language
English
LU publication?
yes
id
97a7618c-5bb8-4aa3-a281-899cf68329e7
date added to LUP
2021-12-22 08:46:00
date last changed
2022-04-27 06:49:45
@article{97a7618c-5bb8-4aa3-a281-899cf68329e7,
  abstract     = {{<p>A novel S-scheme photocatalytic heterojunction composite nanomaterial is developed by integrating zero-dimensional WO<sub>3</sub> quantum dots (WQDs) on two-dimensional ultrathin CdIn<sub>2</sub>S<sub>4</sub> (CIS) nanosheets with the aim of fostering carrier separation, enhancing the performance of carrier interface transport, minimizing carrier distance transport, and achieving effective photocatalytic CO<sub>2</sub> reduction. The composite photocatalyst WQDs/CdIn<sub>2</sub>S<sub>4</sub> (WCIS) allows for the efficient photocatalytic reduction of CO<sub>2</sub> to CO and CH<sub>4</sub>, as shown by product analysis and isotopic measurement. The photogenerated electrons in WQDs recombine with the holes in CIS nanosheets, and the left electrons in CIS have stronger CO<sub>2</sub> reduction abilities. The highest yields of CO and CH<sub>4</sub> achieved with the WCIS photocatalyst are 8.2 and 1.6 μmol g<sup>-1</sup>h<sup>−1</sup> ––2.6 and 8 times higher than those for CIS, respectively. Moreover, the S-scheme WCIS possesses a stable crystal structure and recycling ability. Finally, the S-scheme charge transfer path on the WCIS composite is proposed according to theoretical calculation, in-situ irradiated X-ray photoelectron spectroscopy, and electron paramagnetic resonance (ESR) analyses.</p>}},
  author       = {{Zhang, Zhenzong and Cao, Yuxin and Zhang, Fenghao and Li, Wenjie and Li, Yuanling and Yu, Han and Wang, Meiyang and Yu, Hongbing}},
  issn         = {{1385-8947}},
  keywords     = {{CdInS; CO reduction; Photocatalysis; S-scheme; WO QDs}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Chemical Engineering Journal}},
  title        = {{Tungsten oxide quantum dots deposited onto ultrathin CdIn<sub>2</sub>S<sub>4</sub> nanosheets for efficient S-scheme photocatalytic CO<sub>2</sub> reduction via cascade charge transfer}},
  url          = {{http://dx.doi.org/10.1016/j.cej.2021.131218}},
  doi          = {{10.1016/j.cej.2021.131218}},
  volume       = {{428}},
  year         = {{2021}},
}