Hexagonal Zn1-xCdxS (0.2 ≤ x ≤ 1) solid solution photocatalysts for H2 generation from water

Zongwei Mei; Mingjian Zhang; Julian Schneider; Wei Wang; Ning Zhang; Yantao Su; Bingkun Chen; Shufeng Wang; Andrey L. Rogach; Feng Pan

doi:10.1039/c6cy02572b

Hexagonal Zn_1-xCd_xS (0.2 ≤ x ≤ 1) solid solution photocatalysts for H₂ generation from water

Zongwei Mei, Mingjian Zhang, Julian Schneider, Wei Wang, Ning Zhang, Yantao Su, Bingkun Chen, Shufeng Wang, Andrey L. Rogach, Feng Pan^*

^*Corresponding author for this work

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

55 Citations (Scopus)

Abstract

A series of hexagonal Zn_1-xCd_xS photocatalysts with variable composition (0.2 ≤ x ≤ 1) is synthesized by a solvothermal method. XPS spectra of Zn 2p and Cd 3d regularly shift upon changing the composition of Zn_1-xCd_xS samples, due to the difference in the Mulliken atomic charges of Zn, Cd, and S. The photocatalytic activity of the samples for H₂ evolution from water was tested under visible-light irradiation (λ ≥ 420 nm) without a cocatalyst; the Zn_0.4Cd_0.6S sample exhibited the highest photocatalytic H₂ evolution rate, which was about 81 mL h^-1 g^-1. Under irradiation with a 368 nm LED, the H₂ evolution rate decreased with increasing Cd fraction in the Zn_1-xCd_xS solid solution. By comparing the crystallinity, surface area, valence/conduction band positions, absorption spectra and fluorescence lifetimes, we conclude that the photocatalytic activity is related to the balance between the absolute positions of the valence/conduction bands and light absorption ability of the Zn_1-xCd_xS photocatalysts.

Original language	English
Pages (from-to)	982-987
Number of pages	6
Journal	Catalysis Science and Technology
Volume	7
Issue number	4
DOIs	https://doi.org/10.1039/c6cy02572b
Publication status	Published - 2017
Externally published	Yes

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title = "Hexagonal Zn1-xCdxS (0.2 ≤ x ≤ 1) solid solution photocatalysts for H2 generation from water",

abstract = "A series of hexagonal Zn1-xCdxS photocatalysts with variable composition (0.2 ≤ x ≤ 1) is synthesized by a solvothermal method. XPS spectra of Zn 2p and Cd 3d regularly shift upon changing the composition of Zn1-xCdxS samples, due to the difference in the Mulliken atomic charges of Zn, Cd, and S. The photocatalytic activity of the samples for H2 evolution from water was tested under visible-light irradiation (λ ≥ 420 nm) without a cocatalyst; the Zn0.4Cd0.6S sample exhibited the highest photocatalytic H2 evolution rate, which was about 81 mL h-1 g-1. Under irradiation with a 368 nm LED, the H2 evolution rate decreased with increasing Cd fraction in the Zn1-xCdxS solid solution. By comparing the crystallinity, surface area, valence/conduction band positions, absorption spectra and fluorescence lifetimes, we conclude that the photocatalytic activity is related to the balance between the absolute positions of the valence/conduction bands and light absorption ability of the Zn1-xCdxS photocatalysts.",

author = "Zongwei Mei and Mingjian Zhang and Julian Schneider and Wei Wang and Ning Zhang and Yantao Su and Bingkun Chen and Shufeng Wang and Rogach, {Andrey L.} and Feng Pan",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2017.",

year = "2017",

doi = "10.1039/c6cy02572b",

language = "English",

volume = "7",

pages = "982--987",

journal = "Catalysis Science and Technology",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Hexagonal Zn1-xCdxS (0.2 ≤ x ≤ 1) solid solution photocatalysts for H2 generation from water

AU - Mei, Zongwei

AU - Zhang, Mingjian

AU - Schneider, Julian

AU - Wang, Wei

AU - Zhang, Ning

AU - Su, Yantao

AU - Chen, Bingkun

AU - Wang, Shufeng

AU - Rogach, Andrey L.

AU - Pan, Feng

PY - 2017

Y1 - 2017

N2 - A series of hexagonal Zn1-xCdxS photocatalysts with variable composition (0.2 ≤ x ≤ 1) is synthesized by a solvothermal method. XPS spectra of Zn 2p and Cd 3d regularly shift upon changing the composition of Zn1-xCdxS samples, due to the difference in the Mulliken atomic charges of Zn, Cd, and S. The photocatalytic activity of the samples for H2 evolution from water was tested under visible-light irradiation (λ ≥ 420 nm) without a cocatalyst; the Zn0.4Cd0.6S sample exhibited the highest photocatalytic H2 evolution rate, which was about 81 mL h-1 g-1. Under irradiation with a 368 nm LED, the H2 evolution rate decreased with increasing Cd fraction in the Zn1-xCdxS solid solution. By comparing the crystallinity, surface area, valence/conduction band positions, absorption spectra and fluorescence lifetimes, we conclude that the photocatalytic activity is related to the balance between the absolute positions of the valence/conduction bands and light absorption ability of the Zn1-xCdxS photocatalysts.

AB - A series of hexagonal Zn1-xCdxS photocatalysts with variable composition (0.2 ≤ x ≤ 1) is synthesized by a solvothermal method. XPS spectra of Zn 2p and Cd 3d regularly shift upon changing the composition of Zn1-xCdxS samples, due to the difference in the Mulliken atomic charges of Zn, Cd, and S. The photocatalytic activity of the samples for H2 evolution from water was tested under visible-light irradiation (λ ≥ 420 nm) without a cocatalyst; the Zn0.4Cd0.6S sample exhibited the highest photocatalytic H2 evolution rate, which was about 81 mL h-1 g-1. Under irradiation with a 368 nm LED, the H2 evolution rate decreased with increasing Cd fraction in the Zn1-xCdxS solid solution. By comparing the crystallinity, surface area, valence/conduction band positions, absorption spectra and fluorescence lifetimes, we conclude that the photocatalytic activity is related to the balance between the absolute positions of the valence/conduction bands and light absorption ability of the Zn1-xCdxS photocatalysts.

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U2 - 10.1039/c6cy02572b

DO - 10.1039/c6cy02572b

M3 - Article

AN - SCOPUS:85014710286

SN - 2044-4753

VL - 7

SP - 982

EP - 987

JO - Catalysis Science and Technology

JF - Catalysis Science and Technology

IS - 4

ER -

Hexagonal Zn_1-xCd_xS (0.2 ≤ x ≤ 1) solid solution photocatalysts for H₂ generation from water

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