Molybdenum disulfide quantum dots decorated bismuth sulfide as a superior noble-metal-free photocatalyst for hydrogen evolution through harnessing a broad solar spectrum

W. P.Cathie Lee; Xin Ying Kong; Lling Lling Tan; Meei Mei Gui; S. Sumathi; Siang Piao Chai

doi:10.1016/j.apcatb.2018.03.019

Molybdenum disulfide quantum dots decorated bismuth sulfide as a superior noble-metal-free photocatalyst for hydrogen evolution through harnessing a broad solar spectrum

W. P.Cathie Lee, Xin Ying Kong, Lling Lling Tan, Meei Mei Gui, S. Sumathi, Siang Piao Chai^*

^*Corresponding author for this work

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

16 Citations (Scopus)

Abstract

Molybdenum disulfide quantum dots (MoS ₂ QDs) decorated bismuth sulfide (Bi ₂ S ₃ ) photocatalyst was synthesized. Photoluminescence characterization showed that the as-developed MoS ₂ QDs possessed intriguing up-conversion and down-conversion properties, indicating their capability to harness energy from the light spectrum ranging from ultraviolet (UV) to near-infrared (NIR). In this study, the highest hydrogen yield of 17.7 mmol/g.h was achieved by 0.14MoS ₂ QD/Bi ₂ S ₃ , which was almost 4.5 folds higher than that of undoped Bi ₂ S ₃ under stimulated solar light irradiation. Furthermore, examination of the 0.14MoS ₂ QD/Bi ₂ S ₃ photocatalysts under NIR irradiation showed a significant photocurrent response and an accumulative H ₂ yield of 53.6 μmol/g after 6 h reaction. This is a major breakthrough as most photocatalysts can only be activated under UV and/or visible light irradiation. This work provides new insights into the design of MoS ₂ QD/Bi ₂ S ₃ for harnessing energy from a broad solar spectrum to photocatalytically split water to produce hydrogen.

Original language	English
Pages (from-to)	117-123
Journal	Applied Catalysis B: Environmental
Volume	232
DOIs	https://doi.org/10.1016/j.apcatb.2018.03.019
Publication status	Published - 15 Sep 2018
Externally published	Yes

Keywords

Broad solar spectrum
Hydrogen
Molybdenum disulfide
Photocatalyst
Quantum dots

ASJC Scopus subject areas

Catalysis
Environmental Science(all)
Process Chemistry and Technology

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@article{3eee2d69fab04130ac9323ee4d3bf746,

title = "Molybdenum disulfide quantum dots decorated bismuth sulfide as a superior noble-metal-free photocatalyst for hydrogen evolution through harnessing a broad solar spectrum",

abstract = " Molybdenum disulfide quantum dots (MoS 2 QDs) decorated bismuth sulfide (Bi 2 S 3 ) photocatalyst was synthesized. Photoluminescence characterization showed that the as-developed MoS 2 QDs possessed intriguing up-conversion and down-conversion properties, indicating their capability to harness energy from the light spectrum ranging from ultraviolet (UV) to near-infrared (NIR). In this study, the highest hydrogen yield of 17.7 mmol/g.h was achieved by 0.14MoS 2 QD/Bi 2 S 3 , which was almost 4.5 folds higher than that of undoped Bi 2 S 3 under stimulated solar light irradiation. Furthermore, examination of the 0.14MoS 2 QD/Bi 2 S 3 photocatalysts under NIR irradiation showed a significant photocurrent response and an accumulative H 2 yield of 53.6 μmol/g after 6 h reaction. This is a major breakthrough as most photocatalysts can only be activated under UV and/or visible light irradiation. This work provides new insights into the design of MoS 2 QD/Bi 2 S 3 for harnessing energy from a broad solar spectrum to photocatalytically split water to produce hydrogen. ",

keywords = "Broad solar spectrum, Hydrogen, Molybdenum disulfide, Photocatalyst, Quantum dots",

author = "Lee, {W. P.Cathie} and Kong, {Xin Ying} and Tan, {Lling Lling} and Gui, {Meei Mei} and S. Sumathi and Chai, {Siang Piao}",

year = "2018",

month = sep,

day = "15",

doi = "10.1016/j.apcatb.2018.03.019",

language = "English",

volume = "232",

pages = "117--123",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier",

}

Molybdenum disulfide quantum dots decorated bismuth sulfide as a superior noble-metal-free photocatalyst for hydrogen evolution through harnessing a broad solar spectrum. / Lee, W. P.Cathie; Kong, Xin Ying; Tan, Lling Lling; Gui, Meei Mei; Sumathi, S.; Chai, Siang Piao.

In: Applied Catalysis B: Environmental, Vol. 232, 15.09.2018, p. 117-123.

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

TY - JOUR

T1 - Molybdenum disulfide quantum dots decorated bismuth sulfide as a superior noble-metal-free photocatalyst for hydrogen evolution through harnessing a broad solar spectrum

AU - Lee, W. P.Cathie

AU - Kong, Xin Ying

AU - Tan, Lling Lling

AU - Gui, Meei Mei

AU - Sumathi, S.

AU - Chai, Siang Piao

PY - 2018/9/15

Y1 - 2018/9/15

N2 - Molybdenum disulfide quantum dots (MoS 2 QDs) decorated bismuth sulfide (Bi 2 S 3 ) photocatalyst was synthesized. Photoluminescence characterization showed that the as-developed MoS 2 QDs possessed intriguing up-conversion and down-conversion properties, indicating their capability to harness energy from the light spectrum ranging from ultraviolet (UV) to near-infrared (NIR). In this study, the highest hydrogen yield of 17.7 mmol/g.h was achieved by 0.14MoS 2 QD/Bi 2 S 3 , which was almost 4.5 folds higher than that of undoped Bi 2 S 3 under stimulated solar light irradiation. Furthermore, examination of the 0.14MoS 2 QD/Bi 2 S 3 photocatalysts under NIR irradiation showed a significant photocurrent response and an accumulative H 2 yield of 53.6 μmol/g after 6 h reaction. This is a major breakthrough as most photocatalysts can only be activated under UV and/or visible light irradiation. This work provides new insights into the design of MoS 2 QD/Bi 2 S 3 for harnessing energy from a broad solar spectrum to photocatalytically split water to produce hydrogen.

AB - Molybdenum disulfide quantum dots (MoS 2 QDs) decorated bismuth sulfide (Bi 2 S 3 ) photocatalyst was synthesized. Photoluminescence characterization showed that the as-developed MoS 2 QDs possessed intriguing up-conversion and down-conversion properties, indicating their capability to harness energy from the light spectrum ranging from ultraviolet (UV) to near-infrared (NIR). In this study, the highest hydrogen yield of 17.7 mmol/g.h was achieved by 0.14MoS 2 QD/Bi 2 S 3 , which was almost 4.5 folds higher than that of undoped Bi 2 S 3 under stimulated solar light irradiation. Furthermore, examination of the 0.14MoS 2 QD/Bi 2 S 3 photocatalysts under NIR irradiation showed a significant photocurrent response and an accumulative H 2 yield of 53.6 μmol/g after 6 h reaction. This is a major breakthrough as most photocatalysts can only be activated under UV and/or visible light irradiation. This work provides new insights into the design of MoS 2 QD/Bi 2 S 3 for harnessing energy from a broad solar spectrum to photocatalytically split water to produce hydrogen.

KW - Broad solar spectrum

KW - Hydrogen

KW - Molybdenum disulfide

KW - Photocatalyst

KW - Quantum dots

U2 - 10.1016/j.apcatb.2018.03.019

DO - 10.1016/j.apcatb.2018.03.019

M3 - Article

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SN - 0926-3373

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