Designed Construction of SrTiO3/SrSO4/Pt Heterojunctions with Boosted Photocatalytic H2 Evolution Activity

Jingyi Cai; Haoshan Wei; Yong Zhang; Rui Cai; Xueru Zhang; Yan Wang; Jiaqin Liu; Hark Hoe Tan; Ting Xie; Yucheng Wu

doi:10.1002/chem.202100101

Designed Construction of SrTiO₃/SrSO₄/Pt Heterojunctions with Boosted Photocatalytic H₂ Evolution Activity

Jingyi Cai, Haoshan Wei, Yong Zhang^*, Rui Cai, Xueru Zhang, Yan Wang, Jiaqin Liu, Hark Hoe Tan, Ting Xie, Yucheng Wu^*

^*Corresponding author for this work

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

11 Citations (Scopus)

Abstract

Efficient separation of photogenerated electron–hole pairs is a crucial factor for high-performance photocatalysts. Effective electron–hole separation and migration could be achieved by heterojunctions with suitable band structures. Herein, a porous SrTiO₃/SrSO₄ heterojunction is prepared by a sol-gel method at room temperature followed by an annealing process. XRD characterization suggests high crystallinity of the heterostructure. A well-defined interface between the two phases is confirmed by high-resolution (HR)TEM. The photocatalytic H₂ evolution productivity of the SrTiO₃/SrSO₄ heterojunction with Pt as co-catalyst reaches 396.82 μmol g⁻¹ h⁻¹, which is 16 times higher than that of SrTiO₃/Pt. The boosted photocatalytic activity of SrTiO₃/SrSO₄/Pt can be ascribed to the presence of SrSO₄, which promotes the transfer and migration of photogenerated carriers by forming the heterojunction and porous structure, which provides a large amount of active sites. This novel porous heterostructure brings new ideas for the development of high-efficiency photocatalysts for H₂ release.

Original language	English
Pages (from-to)	7300-7306
Number of pages	7
Journal	Chemistry - A European Journal
Volume	27
Issue number	25
DOIs	https://doi.org/10.1002/chem.202100101
Publication status	Published - 3 May 2021

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@article{7073b9ae37344f35842ae607f04c5236,

title = "Designed Construction of SrTiO3/SrSO4/Pt Heterojunctions with Boosted Photocatalytic H2 Evolution Activity",

abstract = "Efficient separation of photogenerated electron–hole pairs is a crucial factor for high-performance photocatalysts. Effective electron–hole separation and migration could be achieved by heterojunctions with suitable band structures. Herein, a porous SrTiO3/SrSO4 heterojunction is prepared by a sol-gel method at room temperature followed by an annealing process. XRD characterization suggests high crystallinity of the heterostructure. A well-defined interface between the two phases is confirmed by high-resolution (HR)TEM. The photocatalytic H2 evolution productivity of the SrTiO3/SrSO4 heterojunction with Pt as co-catalyst reaches 396.82 μmol g−1 h−1, which is 16 times higher than that of SrTiO3/Pt. The boosted photocatalytic activity of SrTiO3/SrSO4/Pt can be ascribed to the presence of SrSO4, which promotes the transfer and migration of photogenerated carriers by forming the heterojunction and porous structure, which provides a large amount of active sites. This novel porous heterostructure brings new ideas for the development of high-efficiency photocatalysts for H2 release.",

keywords = "heterojunctions, photocatalysts, sol–gel method, strontium sulfate, strontium titanium oxide",

author = "Jingyi Cai and Haoshan Wei and Yong Zhang and Rui Cai and Xueru Zhang and Yan Wang and Jiaqin Liu and Tan, {Hark Hoe} and Ting Xie and Yucheng Wu",

note = "Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

year = "2021",

month = may,

day = "3",

doi = "10.1002/chem.202100101",

language = "English",

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T1 - Designed Construction of SrTiO3/SrSO4/Pt Heterojunctions with Boosted Photocatalytic H2 Evolution Activity

AU - Cai, Jingyi

AU - Wei, Haoshan

AU - Zhang, Yong

AU - Cai, Rui

AU - Zhang, Xueru

AU - Wang, Yan

AU - Liu, Jiaqin

AU - Tan, Hark Hoe

AU - Xie, Ting

AU - Wu, Yucheng

PY - 2021/5/3

Y1 - 2021/5/3

N2 - Efficient separation of photogenerated electron–hole pairs is a crucial factor for high-performance photocatalysts. Effective electron–hole separation and migration could be achieved by heterojunctions with suitable band structures. Herein, a porous SrTiO3/SrSO4 heterojunction is prepared by a sol-gel method at room temperature followed by an annealing process. XRD characterization suggests high crystallinity of the heterostructure. A well-defined interface between the two phases is confirmed by high-resolution (HR)TEM. The photocatalytic H2 evolution productivity of the SrTiO3/SrSO4 heterojunction with Pt as co-catalyst reaches 396.82 μmol g−1 h−1, which is 16 times higher than that of SrTiO3/Pt. The boosted photocatalytic activity of SrTiO3/SrSO4/Pt can be ascribed to the presence of SrSO4, which promotes the transfer and migration of photogenerated carriers by forming the heterojunction and porous structure, which provides a large amount of active sites. This novel porous heterostructure brings new ideas for the development of high-efficiency photocatalysts for H2 release.

AB - Efficient separation of photogenerated electron–hole pairs is a crucial factor for high-performance photocatalysts. Effective electron–hole separation and migration could be achieved by heterojunctions with suitable band structures. Herein, a porous SrTiO3/SrSO4 heterojunction is prepared by a sol-gel method at room temperature followed by an annealing process. XRD characterization suggests high crystallinity of the heterostructure. A well-defined interface between the two phases is confirmed by high-resolution (HR)TEM. The photocatalytic H2 evolution productivity of the SrTiO3/SrSO4 heterojunction with Pt as co-catalyst reaches 396.82 μmol g−1 h−1, which is 16 times higher than that of SrTiO3/Pt. The boosted photocatalytic activity of SrTiO3/SrSO4/Pt can be ascribed to the presence of SrSO4, which promotes the transfer and migration of photogenerated carriers by forming the heterojunction and porous structure, which provides a large amount of active sites. This novel porous heterostructure brings new ideas for the development of high-efficiency photocatalysts for H2 release.

KW - heterojunctions

KW - photocatalysts

KW - sol–gel method

KW - strontium sulfate

KW - strontium titanium oxide

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U2 - 10.1002/chem.202100101

DO - 10.1002/chem.202100101

M3 - Article

SN - 0947-6539

VL - 27

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JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

IS - 25

ER -

Designed Construction of SrTiO₃/SrSO₄/Pt Heterojunctions with Boosted Photocatalytic H₂ Evolution Activity

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