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Integrated Z‐Scheme Nanosystem Based on Metal Sulfide Nanorods for Efficient Photocatalytic Pure Water Splitting
Author(s) -
Qin Zhixiao,
Guan Xiangjiu,
Guo Xu,
Guo Penghui,
Wang Menglong,
Huang Zhenxiong,
Chen Yubin
Publication year - 2020
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.202002171
Subject(s) - nanorod , photocatalysis , water splitting , materials science , electron transfer , sulfide , catalysis , metal , photocatalytic water splitting , nanotechnology , chemical engineering , chemistry , photochemistry , biochemistry , engineering , metallurgy
Developing efficient metal sulfides for pure water splitting is a challenging topic in the field of photocatalysis. Herein, inspired by natural photosynthesis, an all‐solid‐state Z‐scheme photocatalyst was constructed with Cd 0.9 Zn 0.1 S (CZS) for water reduction, red phosphorus (RP) for water oxidation, and metallic CoP as the electron mediator. RP@CoP core‐shell nanostructures were uniformly attached on the CZS nanorods, which gave rise to multiple monodispersed nanojunctions. The integrated Z‐scheme nanosystem exhibited an apparent quantum efficiency of 6.4 % at 420 nm for pure water splitting. Theoretical analysis and femtosecond transient absorption results revealed that the impressive performance was mainly due to efficient hole transfer of CZS, resulting from the intimate atomic contacts between CoP mediator and photocatalysts, together with favorable band alignment. Meanwhile, the multiple monodispersed Z‐scheme nanojunctions could provide abundant reaction sites, which was also important for the boosted activity.