1. Designed Construction of SrTiO 3 /SrSO 4 /Pt Heterojunctions with Boosted Photocatalytic H 2 Evolution Activity
- Author
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Rui Cai, Ting Xie, Jiaqin Liu, Jingyi Cai, Haoshan Wei, Yan Wang, Yucheng Wu, Hark Hoe Tan, Xueru Zhang, and Yong Zhang
- Subjects
Chemistry ,Annealing (metallurgy) ,Organic Chemistry ,Heterojunction ,General Chemistry ,Catalysis ,Crystallinity ,chemistry.chemical_compound ,Chemical engineering ,Photocatalysis ,Strontium sulfate ,Porosity ,Sol-gel ,Strontium titanium oxide - 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. more...
- Published
- 2021
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