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Designing Efficient MoS 2 /g‐C 3 N 4 Hybrid Photocatalysts by Regulating the Interlayer Spacing of MoS 2
Author(s) -
Ding Jinghan,
Wang Yijin,
Guo Shaohui,
Zhang Youzi,
Xin Xu,
Tang Songwei,
Liu Sibi,
Li Xuanhua
Publication year - 2021
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202100522
Subject(s) - photocatalysis , calcination , chemistry , photoelectric effect , hydrothermal circulation , band gap , absorbance , nanotechnology , absorption (acoustics) , optoelectronics , chemical engineering , catalysis , materials science , optics , physics , organic chemistry , chromatography , engineering
g‐C 3 N 4 as an appealing photocatalyst has received much attention due to its abundance, nontoxicity, and unique photoelectric properties. However, bare g‐C 3 N 4 usually suffers from restricted light absorbance and serious carriers recombination. The key issue of boosting the photocatalytic performance of the g‐C 3 N 4 lies in constructing hybrids for better optical and electrical effects. Here, the MoS 2 with different interlayer spacing is integrated with g‐C 3 N 4 via calcination and hydrothermal methods to form the high‐performance MoS 2 /g‐C 3 N 4 hybrid photocatalyst. Optimized energy‐band alignment with g‐C 3 N 4 is realized through regulating the interlayer spacing of MoS 2 , achieving improved carriers separation efficiency. In addition, the broadband absorption and rich active sites are also achieved here. As a result, the rationally designed MoS 2 /g‐C 3 N 4 composite (the MoS 2 interlayer spacing: 1.02 nm) exhibits the dominant photocatalytic performance (hydrogen production rate: 1281 μmol/h/g). This work opens a new road to realize a proper energy‐band alignment with g‐C 3 N 4 for high performance photocatalytic activity.