Visible‐Light‐Driven Photocatalytic Z‐Scheme Overall Water Splitting in La 5 Ti 2 AgS 5 O 7 ‐based Powder‐Suspension System | Zendy

Song Zhimin | Zendy; Hisatomi Takashi | Zendy; Chen Shanshan | Zendy; Wang Qian | Zendy; Ma Guijun | Zendy; Li Shikuo | Zendy; Zhu Xiaodi | Zendy; Sun Song | Zendy; Domen Kazunari | Zendy

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Visible‐Light‐Driven Photocatalytic Z‐Scheme Overall Water Splitting in La 5 Ti 2 AgS 5 O 7 ‐based Powder‐Suspension System

Author(s) -

Song Zhimin,

Hisatomi Takashi,

Chen Shanshan,

Wang Qian,

Ma Guijun,

Li Shikuo,

Zhu Xiaodi,

Sun Song,

Domen Kazunari

Publication year - 2019

Publication title -

chemsuschem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.412

H-Index - 157

eISSN - 1864-564X

pISSN - 1864-5631

DOI - 10.1002/cssc.201802306

Subject(s) - water splitting , photocatalysis , suspension (topology) , materials science , visible spectrum , chemical engineering , chemistry , catalysis , optoelectronics , biochemistry , mathematics , homotopy , pure mathematics , engineering

La 5 Ti 2 Cu x Ag 1− x S 5 O 7 ( x =0–1) is a type of long‐wavelength‐responsive oxysulfide photocatalysts for hydrogen evolution and has been demonstrated to enable the Z‐scheme water‐splitting coupling with oxygen evolution photocatalysts (OEPs) in the particulate sheet. Among La 5 Ti 2 Cu x Ag 1− x S 5 O 7 materials, La 5 Ti 2 AgS 5 O 7 was found to have the highest performance on Z‐scheme overall water splitting in conjunction with PtO x ‐WO 3 as an OEP and a triiodide/iodide (I 3 − /I − ) redox couple as a shuttle electron mediator in a powder‐suspension system. Loading Pt/NiS on La 5 Ti 2 AgS 5 O 7 benefitted the Z‐scheme to achieve an apparent quantum yield of 0.12 % at 420 nm. The results for this powder‐suspension system differ from earlier studies on photocatalyst sheet configurations, in which p‐type doping and the formation of a solid solution could effectively enhance the water‐splitting activity. This work not only demonstrates a La 5 Ti 2 AgS 5 O 7 ‐based Z‐scheme water‐splitting photocatalyst but also improves the understanding of the difference between particulate sheets and a powder‐suspension system available in an optimal strategy for water splitting.

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