C-doped ZnS-ZnO/Rh nanosheets as multijunctioned photocatalysts for effective H2 generation from pure water under solar simulating light

Sovann Khan; Minyeong Je; Nhan Nu Thanh Ton; Wenwei Lei; Toshiaki Taniike; Sayaka Yanagida; Daisuke Ogawa; Norihiro Suzuki; Chiaki Terashima; Akira Fujishima; Heechae Choi; Ken ichi Katsumata

doi:10.1016/j.apcatb.2021.120473

C-doped ZnS-ZnO/Rh nanosheets as multijunctioned photocatalysts for effective H₂ generation from pure water under solar simulating light

Sovann Khan^*, Minyeong Je, Nhan Nu Thanh Ton, Wenwei Lei, Toshiaki Taniike, Sayaka Yanagida, Daisuke Ogawa, Norihiro Suzuki, Chiaki Terashima, Akira Fujishima, Heechae Choi^*, Ken ichi Katsumata

^*Corresponding author for this work

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

51 Citations (Scopus)

Abstract

A combined solvothermal method and post-annealing to synthesize highly active ZnS-ZnO nanosheets is presented. ZnO was produced on ZnS nanosheets by thermal annealing ZnS/ethylenediamine in air. From combined studies of experimental and computational works, we revealed that during annealing, carbon (C) element was a major dopant from the decomposition of ethylenediamine, which was unintentionally doped into the ZnS-ZnO, and gave major impacts on enhanced visible-light photocatalysis. Rhodium (Rh) was deposited by in situ photoreduction to form a ZnS-ZnO/Rh catalyst composite. This multijunctioned photocatalyst was outstanding for H₂ generation from pure water under solar simulating light due to effective charge separation by Z-scheme heterojunction of ZnS and ZnO and Schottky junction of Rh-cocatalysts/semiconductors. This facile method realizes multijunctioned ZnS-ZnO/Rh photocatalysts with substantial defects that are very promising for solar-energy harvesting applications.

Original language	English
Article number	120473
Journal	Applied Catalysis B: Environmental
Volume	297
DOIs	https://doi.org/10.1016/j.apcatb.2021.120473
Publication status	Published - 15 Nov 2021
Externally published	Yes

Keywords

DFT
H generation
Nanosheet
Photocatalytic water-splitting
ZnS-ZnO

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.apcatb.2021.120473

Cite this

Khan, S., Je, M., Ton, N. N. T., Lei, W., Taniike, T., Yanagida, S., Ogawa, D., Suzuki, N., Terashima, C., Fujishima, A., Choi, H., & Katsumata, K. I. (2021). C-doped ZnS-ZnO/Rh nanosheets as multijunctioned photocatalysts for effective H₂ generation from pure water under solar simulating light. Applied Catalysis B: Environmental, 297, Article 120473. https://doi.org/10.1016/j.apcatb.2021.120473

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title = "C-doped ZnS-ZnO/Rh nanosheets as multijunctioned photocatalysts for effective H2 generation from pure water under solar simulating light",

abstract = "A combined solvothermal method and post-annealing to synthesize highly active ZnS-ZnO nanosheets is presented. ZnO was produced on ZnS nanosheets by thermal annealing ZnS/ethylenediamine in air. From combined studies of experimental and computational works, we revealed that during annealing, carbon (C) element was a major dopant from the decomposition of ethylenediamine, which was unintentionally doped into the ZnS-ZnO, and gave major impacts on enhanced visible-light photocatalysis. Rhodium (Rh) was deposited by in situ photoreduction to form a ZnS-ZnO/Rh catalyst composite. This multijunctioned photocatalyst was outstanding for H2 generation from pure water under solar simulating light due to effective charge separation by Z-scheme heterojunction of ZnS and ZnO and Schottky junction of Rh-cocatalysts/semiconductors. This facile method realizes multijunctioned ZnS-ZnO/Rh photocatalysts with substantial defects that are very promising for solar-energy harvesting applications.",

keywords = "DFT, H generation, Nanosheet, Photocatalytic water-splitting, ZnS-ZnO",

author = "Sovann Khan and Minyeong Je and Ton, {Nhan Nu Thanh} and Wenwei Lei and Toshiaki Taniike and Sayaka Yanagida and Daisuke Ogawa and Norihiro Suzuki and Chiaki Terashima and Akira Fujishima and Heechae Choi and Katsumata, {Ken ichi}",

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Khan, S, Je, M, Ton, NNT, Lei, W, Taniike, T, Yanagida, S, Ogawa, D, Suzuki, N, Terashima, C, Fujishima, A, Choi, H & Katsumata, KI 2021, 'C-doped ZnS-ZnO/Rh nanosheets as multijunctioned photocatalysts for effective H₂ generation from pure water under solar simulating light', Applied Catalysis B: Environmental, vol. 297, 120473. https://doi.org/10.1016/j.apcatb.2021.120473

TY - JOUR

T1 - C-doped ZnS-ZnO/Rh nanosheets as multijunctioned photocatalysts for effective H2 generation from pure water under solar simulating light

AU - Khan, Sovann

AU - Je, Minyeong

AU - Ton, Nhan Nu Thanh

AU - Lei, Wenwei

AU - Taniike, Toshiaki

AU - Yanagida, Sayaka

AU - Ogawa, Daisuke

AU - Suzuki, Norihiro

AU - Terashima, Chiaki

AU - Fujishima, Akira

AU - Choi, Heechae

AU - Katsumata, Ken ichi

PY - 2021/11/15

Y1 - 2021/11/15

N2 - A combined solvothermal method and post-annealing to synthesize highly active ZnS-ZnO nanosheets is presented. ZnO was produced on ZnS nanosheets by thermal annealing ZnS/ethylenediamine in air. From combined studies of experimental and computational works, we revealed that during annealing, carbon (C) element was a major dopant from the decomposition of ethylenediamine, which was unintentionally doped into the ZnS-ZnO, and gave major impacts on enhanced visible-light photocatalysis. Rhodium (Rh) was deposited by in situ photoreduction to form a ZnS-ZnO/Rh catalyst composite. This multijunctioned photocatalyst was outstanding for H2 generation from pure water under solar simulating light due to effective charge separation by Z-scheme heterojunction of ZnS and ZnO and Schottky junction of Rh-cocatalysts/semiconductors. This facile method realizes multijunctioned ZnS-ZnO/Rh photocatalysts with substantial defects that are very promising for solar-energy harvesting applications.

AB - A combined solvothermal method and post-annealing to synthesize highly active ZnS-ZnO nanosheets is presented. ZnO was produced on ZnS nanosheets by thermal annealing ZnS/ethylenediamine in air. From combined studies of experimental and computational works, we revealed that during annealing, carbon (C) element was a major dopant from the decomposition of ethylenediamine, which was unintentionally doped into the ZnS-ZnO, and gave major impacts on enhanced visible-light photocatalysis. Rhodium (Rh) was deposited by in situ photoreduction to form a ZnS-ZnO/Rh catalyst composite. This multijunctioned photocatalyst was outstanding for H2 generation from pure water under solar simulating light due to effective charge separation by Z-scheme heterojunction of ZnS and ZnO and Schottky junction of Rh-cocatalysts/semiconductors. This facile method realizes multijunctioned ZnS-ZnO/Rh photocatalysts with substantial defects that are very promising for solar-energy harvesting applications.

KW - DFT

KW - H generation

KW - Nanosheet

KW - Photocatalytic water-splitting

KW - ZnS-ZnO

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