Transformation of Cuprous Oxide into Hollow Copper Sulfide Cubes for Photocatalytic Hydrogen Generation

Cui Ying Toe; Zhaoke Zheng; Hao Wu; Jason Scott; Rose Amal; Yun Hau Ng

doi:10.1021/acs.jpcc.8b01169

Transformation of Cuprous Oxide into Hollow Copper Sulfide Cubes for Photocatalytic Hydrogen Generation

Cui Ying Toe, Zhaoke Zheng, Hao Wu, Jason Scott, Rose Amal, Yun Hau Ng^*

^*Corresponding author for this work

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

45 Scopus citations

Abstract

Copper sulfide (Cu_xS) with a hollow structure derived from the controlled transformation of cuprous oxide (Cu₂O) demonstrated high activity for photocatalytic hydrogen generation with good reproducibility. While the high photocatalytic activity was facilitated by the better crystallinity and lower copper defect density (thus suppressed charge recombination) yielded through the controlled and equilibrated transformation reaction, the stability of the hollow Cu_xS photocatalyst was attributed to its resistance to sintering induced by the chemical dissolution-redeposition of copper (physicochemical stability). Without the controlled synthesis environment, irregularly shaped Cu_xS accompanied by a higher level of copper defects was obtained. During photocatalytic reaction, the irregularly shaped Cu_xS was more susceptible to deactivation through an agglomeration process.

Original language	English (US)
Pages (from-to)	14072-14081
Number of pages	10
Journal	JOURNAL OF PHYSICAL CHEMISTRY C
Volume	122
Issue number	25
DOIs	https://doi.org/10.1021/acs.jpcc.8b01169
State	Published - Jun 28 2018

Bibliographical note

Publisher Copyright:
© 2018 American Chemical Society.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Transformation of Cuprous Oxide into Hollow Copper Sulfide Cubes for Photocatalytic Hydrogen Generation",

abstract = "Copper sulfide (CuxS) with a hollow structure derived from the controlled transformation of cuprous oxide (Cu2O) demonstrated high activity for photocatalytic hydrogen generation with good reproducibility. While the high photocatalytic activity was facilitated by the better crystallinity and lower copper defect density (thus suppressed charge recombination) yielded through the controlled and equilibrated transformation reaction, the stability of the hollow CuxS photocatalyst was attributed to its resistance to sintering induced by the chemical dissolution-redeposition of copper (physicochemical stability). Without the controlled synthesis environment, irregularly shaped CuxS accompanied by a higher level of copper defects was obtained. During photocatalytic reaction, the irregularly shaped CuxS was more susceptible to deactivation through an agglomeration process.",

author = "Toe, {Cui Ying} and Zhaoke Zheng and Hao Wu and Jason Scott and Rose Amal and Ng, {Yun Hau}",

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AU - Toe, Cui Ying

AU - Zheng, Zhaoke

AU - Wu, Hao

AU - Scott, Jason

AU - Amal, Rose

AU - Ng, Yun Hau

PY - 2018/6/28

Y1 - 2018/6/28

N2 - Copper sulfide (CuxS) with a hollow structure derived from the controlled transformation of cuprous oxide (Cu2O) demonstrated high activity for photocatalytic hydrogen generation with good reproducibility. While the high photocatalytic activity was facilitated by the better crystallinity and lower copper defect density (thus suppressed charge recombination) yielded through the controlled and equilibrated transformation reaction, the stability of the hollow CuxS photocatalyst was attributed to its resistance to sintering induced by the chemical dissolution-redeposition of copper (physicochemical stability). Without the controlled synthesis environment, irregularly shaped CuxS accompanied by a higher level of copper defects was obtained. During photocatalytic reaction, the irregularly shaped CuxS was more susceptible to deactivation through an agglomeration process.

AB - Copper sulfide (CuxS) with a hollow structure derived from the controlled transformation of cuprous oxide (Cu2O) demonstrated high activity for photocatalytic hydrogen generation with good reproducibility. While the high photocatalytic activity was facilitated by the better crystallinity and lower copper defect density (thus suppressed charge recombination) yielded through the controlled and equilibrated transformation reaction, the stability of the hollow CuxS photocatalyst was attributed to its resistance to sintering induced by the chemical dissolution-redeposition of copper (physicochemical stability). Without the controlled synthesis environment, irregularly shaped CuxS accompanied by a higher level of copper defects was obtained. During photocatalytic reaction, the irregularly shaped CuxS was more susceptible to deactivation through an agglomeration process.

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Transformation of Cuprous Oxide into Hollow Copper Sulfide Cubes for Photocatalytic Hydrogen Generation

Abstract

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