Dendritic TiO2/ln2S3/AgInS2 trilaminar core-shell branched nanoarrays and the enhanced activity for photoelectrochemical water splitting

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

doi:10.1002/smll.201400622

Dendritic TiO₂/ln₂S₃/AgInS₂ trilaminar core-shell branched nanoarrays and the enhanced activity for photoelectrochemical water splitting

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

^*Corresponding author for this work

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

81 Scopus citations

Abstract

Hierarchical TiO₂/ln₂S₃/AgInS₂ trilaminar core-shell branched nanorod arrays (T-CS BNRs) have been fabricated directly on conducting glass substrates (FTO) via a facile, versatile and low-cost hydrothermal and successive ionic layer adsorption and reaction (SILAR) for photoelectrochemical (PEC) water splitting. On the basis of optimal thickness of AgInS₂ shell, such TiO₂/ln₂S ₃/AgInS₂ T-CS BNRs exhibit a higher photocatalytic activity, the photocurrent density and efficiency for hydrogen generation are up to 22.13 mA·cm^-2 and 14.83%, which is, to the best of our knowledge, the highest value ever reported for similar nanostructures. The trilaminar architecture is able to suppress carrier recombination and increase electron collection efficiency via (i) increasing the photon absorption through the lager specific surface area of TiO₂ BNRs and a sensitizer layer (AgInS₂), (ii) a buffer layer (ln₂S₃), (iii) a better energy level alignment. TiO₂/ln₂S ₃/AgInS₂ trilaminar core-shell branched nanorod arrays are prepared via SILAR and a hydrothermal method for efficient photoelectrochemical water splitting. The trilaminar architecture is able to suppress carrier recombination and increase electron collection efficiency via increasing the photon absorption through the larger specific surface area and a sensitizer layer (AgInS₂), a buffer layer (ln₂S₃), and better energy level alignment.

Original language	English
Pages (from-to)	3153-3161
Number of pages	9
Journal	Small
Volume	10
Issue number	15
DOIs	https://doi.org/10.1002/smll.201400622
State	Published - 13 Aug 2014
Externally published	Yes

Keywords

branched nanoarrays
buffer layer
water splitting

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Access to Document

10.1002/smll.201400622

Cite this

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title = "Dendritic TiO2/ln2S3/AgInS2 trilaminar core-shell branched nanoarrays and the enhanced activity for photoelectrochemical water splitting",

abstract = "Hierarchical TiO2/ln2S3/AgInS2 trilaminar core-shell branched nanorod arrays (T-CS BNRs) have been fabricated directly on conducting glass substrates (FTO) via a facile, versatile and low-cost hydrothermal and successive ionic layer adsorption and reaction (SILAR) for photoelectrochemical (PEC) water splitting. On the basis of optimal thickness of AgInS2 shell, such TiO2/ln2S 3/AgInS2 T-CS BNRs exhibit a higher photocatalytic activity, the photocurrent density and efficiency for hydrogen generation are up to 22.13 mA·cm-2 and 14.83%, which is, to the best of our knowledge, the highest value ever reported for similar nanostructures. The trilaminar architecture is able to suppress carrier recombination and increase electron collection efficiency via (i) increasing the photon absorption through the lager specific surface area of TiO2 BNRs and a sensitizer layer (AgInS2), (ii) a buffer layer (ln2S3), (iii) a better energy level alignment. TiO2/ln2S 3/AgInS2 trilaminar core-shell branched nanorod arrays are prepared via SILAR and a hydrothermal method for efficient photoelectrochemical water splitting. The trilaminar architecture is able to suppress carrier recombination and increase electron collection efficiency via increasing the photon absorption through the larger specific surface area and a sensitizer layer (AgInS2), a buffer layer (ln2S3), and better energy level alignment.",

keywords = "branched nanoarrays, buffer layer, water splitting",

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

year = "2014",

month = aug,

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doi = "10.1002/smll.201400622",

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AU - Liu, Zhifeng

AU - Guo, Keying

AU - Han, Jianhua

AU - Li, Yajun

AU - Cui, Ting

AU - Wang, Bo

AU - Ya, Jing

AU - Zhou, Cailou

PY - 2014/8/13

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N2 - Hierarchical TiO2/ln2S3/AgInS2 trilaminar core-shell branched nanorod arrays (T-CS BNRs) have been fabricated directly on conducting glass substrates (FTO) via a facile, versatile and low-cost hydrothermal and successive ionic layer adsorption and reaction (SILAR) for photoelectrochemical (PEC) water splitting. On the basis of optimal thickness of AgInS2 shell, such TiO2/ln2S 3/AgInS2 T-CS BNRs exhibit a higher photocatalytic activity, the photocurrent density and efficiency for hydrogen generation are up to 22.13 mA·cm-2 and 14.83%, which is, to the best of our knowledge, the highest value ever reported for similar nanostructures. The trilaminar architecture is able to suppress carrier recombination and increase electron collection efficiency via (i) increasing the photon absorption through the lager specific surface area of TiO2 BNRs and a sensitizer layer (AgInS2), (ii) a buffer layer (ln2S3), (iii) a better energy level alignment. TiO2/ln2S 3/AgInS2 trilaminar core-shell branched nanorod arrays are prepared via SILAR and a hydrothermal method for efficient photoelectrochemical water splitting. The trilaminar architecture is able to suppress carrier recombination and increase electron collection efficiency via increasing the photon absorption through the larger specific surface area and a sensitizer layer (AgInS2), a buffer layer (ln2S3), and better energy level alignment.

AB - Hierarchical TiO2/ln2S3/AgInS2 trilaminar core-shell branched nanorod arrays (T-CS BNRs) have been fabricated directly on conducting glass substrates (FTO) via a facile, versatile and low-cost hydrothermal and successive ionic layer adsorption and reaction (SILAR) for photoelectrochemical (PEC) water splitting. On the basis of optimal thickness of AgInS2 shell, such TiO2/ln2S 3/AgInS2 T-CS BNRs exhibit a higher photocatalytic activity, the photocurrent density and efficiency for hydrogen generation are up to 22.13 mA·cm-2 and 14.83%, which is, to the best of our knowledge, the highest value ever reported for similar nanostructures. The trilaminar architecture is able to suppress carrier recombination and increase electron collection efficiency via (i) increasing the photon absorption through the lager specific surface area of TiO2 BNRs and a sensitizer layer (AgInS2), (ii) a buffer layer (ln2S3), (iii) a better energy level alignment. TiO2/ln2S 3/AgInS2 trilaminar core-shell branched nanorod arrays are prepared via SILAR and a hydrothermal method for efficient photoelectrochemical water splitting. The trilaminar architecture is able to suppress carrier recombination and increase electron collection efficiency via increasing the photon absorption through the larger specific surface area and a sensitizer layer (AgInS2), a buffer layer (ln2S3), and better energy level alignment.

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