Hierarchical TiO2-CuInS2 core-shell nanoarrays for photoelectrochemical water splitting

Keying Guo; Zhifeng Liu; Jianhua Han; Zhichao Liu; Yajun Li; Bo Wang; Ting Cui; Cailou Zhou

doi:10.1039/c4cp01971g

Hierarchical TiO₂-CuInS₂ core-shell nanoarrays for photoelectrochemical water splitting

Keying Guo, Zhifeng Liu^*, Jianhua Han, Zhichao Liu, Yajun Li, Bo Wang, Ting Cui, Cailou Zhou

^*Corresponding author for this work

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

37 Scopus citations

Abstract

Hierarchical TiO₂-CuInS₂ core-shell nanoarrays were fabricated directly on conducting glass substrates (FTO) via facile and low-cost hydrothermal and polyol reduction methods for photoelectrochemical (PEC) water splitting using TiO₂ branched nanorod arrays (BNRs) as the reactive framework. An enhanced optical property of the core-shell structure was discovered. Firstly, TiO₂ BNRs-CuS core-shell structure was synthesized through successive ionic layer adsorption and reaction (SILAR). Subsequently, TiO₂ BNRs-CuInS₂ core-shell structure was derived from TiO₂ BNRs-CuS core-shell structure. On the basis of optimal thickness of the CuInS₂ shell, such a TiO₂ BNRs-CuInS₂ core-shell structure exhibits higher photocatalytic activity, the photocurrent density and efficiency for hydrogen generation are up to 19.07 mA cm^-2 and 11.48%, respectively, which are probably because of the improved absorption efficiency and the appropriate gradient energy gap structure. The TiO₂ BNRs-CuInS₂ core-shell structure can be promising building blocks in photoelectrochemical water splitting systems.

Original language	English
Pages (from-to)	16204-16213
Number of pages	10
Journal	Physical Chemistry Chemical Physics
Volume	16
Issue number	30
DOIs	https://doi.org/10.1039/c4cp01971g
State	Published - 9 Jul 2014
Externally published	Yes

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title = "Hierarchical TiO2-CuInS2 core-shell nanoarrays for photoelectrochemical water splitting",

abstract = "Hierarchical TiO2-CuInS2 core-shell nanoarrays were fabricated directly on conducting glass substrates (FTO) via facile and low-cost hydrothermal and polyol reduction methods for photoelectrochemical (PEC) water splitting using TiO2 branched nanorod arrays (BNRs) as the reactive framework. An enhanced optical property of the core-shell structure was discovered. Firstly, TiO2 BNRs-CuS core-shell structure was synthesized through successive ionic layer adsorption and reaction (SILAR). Subsequently, TiO2 BNRs-CuInS2 core-shell structure was derived from TiO2 BNRs-CuS core-shell structure. On the basis of optimal thickness of the CuInS2 shell, such a TiO2 BNRs-CuInS2 core-shell structure exhibits higher photocatalytic activity, the photocurrent density and efficiency for hydrogen generation are up to 19.07 mA cm-2 and 11.48%, respectively, which are probably because of the improved absorption efficiency and the appropriate gradient energy gap structure. The TiO2 BNRs-CuInS2 core-shell structure can be promising building blocks in photoelectrochemical water splitting systems.",

author = "Keying Guo and Zhifeng Liu and Jianhua Han and Zhichao Liu and Yajun Li and Bo Wang and Ting Cui and Cailou Zhou",

year = "2014",

month = jul,

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doi = "10.1039/c4cp01971g",

language = "英语",

volume = "16",

pages = "16204--16213",

journal = "Physical Chemistry Chemical Physics",

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TY - JOUR

T1 - Hierarchical TiO2-CuInS2 core-shell nanoarrays for photoelectrochemical water splitting

AU - Guo, Keying

AU - Liu, Zhifeng

AU - Han, Jianhua

AU - Liu, Zhichao

AU - Li, Yajun

AU - Wang, Bo

AU - Cui, Ting

AU - Zhou, Cailou

PY - 2014/7/9

Y1 - 2014/7/9

N2 - Hierarchical TiO2-CuInS2 core-shell nanoarrays were fabricated directly on conducting glass substrates (FTO) via facile and low-cost hydrothermal and polyol reduction methods for photoelectrochemical (PEC) water splitting using TiO2 branched nanorod arrays (BNRs) as the reactive framework. An enhanced optical property of the core-shell structure was discovered. Firstly, TiO2 BNRs-CuS core-shell structure was synthesized through successive ionic layer adsorption and reaction (SILAR). Subsequently, TiO2 BNRs-CuInS2 core-shell structure was derived from TiO2 BNRs-CuS core-shell structure. On the basis of optimal thickness of the CuInS2 shell, such a TiO2 BNRs-CuInS2 core-shell structure exhibits higher photocatalytic activity, the photocurrent density and efficiency for hydrogen generation are up to 19.07 mA cm-2 and 11.48%, respectively, which are probably because of the improved absorption efficiency and the appropriate gradient energy gap structure. The TiO2 BNRs-CuInS2 core-shell structure can be promising building blocks in photoelectrochemical water splitting systems.

AB - Hierarchical TiO2-CuInS2 core-shell nanoarrays were fabricated directly on conducting glass substrates (FTO) via facile and low-cost hydrothermal and polyol reduction methods for photoelectrochemical (PEC) water splitting using TiO2 branched nanorod arrays (BNRs) as the reactive framework. An enhanced optical property of the core-shell structure was discovered. Firstly, TiO2 BNRs-CuS core-shell structure was synthesized through successive ionic layer adsorption and reaction (SILAR). Subsequently, TiO2 BNRs-CuInS2 core-shell structure was derived from TiO2 BNRs-CuS core-shell structure. On the basis of optimal thickness of the CuInS2 shell, such a TiO2 BNRs-CuInS2 core-shell structure exhibits higher photocatalytic activity, the photocurrent density and efficiency for hydrogen generation are up to 19.07 mA cm-2 and 11.48%, respectively, which are probably because of the improved absorption efficiency and the appropriate gradient energy gap structure. The TiO2 BNRs-CuInS2 core-shell structure can be promising building blocks in photoelectrochemical water splitting systems.

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SN - 1463-9076

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EP - 16213

JO - Physical Chemistry Chemical Physics

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IS - 30

ER -

Hierarchical TiO₂-CuInS₂ core-shell nanoarrays for photoelectrochemical water splitting

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