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

被引：17

作者：

Cai, Jingyi ^{[1
,2
]}

Wei, Haoshan ^{[1
,2
]}

Zhang, Yong ^{[1
,2
]}

Cai, Rui ^{[1
,2
]}

Zhang, Xueru ^{[3
]}

Wang, Yan ^{[1
,2
]}

Liu, Jiaqin ^{[4
]}

Tan, Hark Hoe ^{[5
,6
]}

Xie, Ting ^{[2
]}

Wu, Yucheng ^{[1
,2
]}

机构：

[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Anhui, Peoples R China

[2] Key Lab Adv Funct Mat & Devices Anhui Prov, Hefei 230009, Peoples R China

[3] Hefei Univ Technol, Instrumental Anal Ctr, Hefei 230009, Peoples R China

[4] Hefei Univ Technol, Inst Ind & Equipment Technol, Hefei 230009, Anhui, Peoples R China

[5] China Int S&T Cooperat Base Adv Energy & Environm, Hefei 230009, Anhui, Peoples R China

[6] Australian Natl Univ, Res Sch Phys & Engn, Dept Elect Mat Engn, Canberra, ACT 2601, Australia

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2021年 / 27卷 / 25期

基金：

中国国家自然科学基金;

关键词：

heterojunctions; photocatalysts; sol– gel method; strontium sulfate; strontium titanium oxide;

D O I：

10.1002/chem.202100101

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 H-2 evolution productivity of the SrTiO3/SrSO4 heterojunction with Pt as co-catalyst reaches 396.82 mu mol 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 H-2 release.

引用

页码：7300 / 7306

页数：7

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