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Synthesis of Ni−MoS x /g‐C 3 N 4 for Photocatalytic Hydrogen Evolution under Visible Light
Author(s) -
Wang Bo,
Li Xia,
Wu Haining,
Xu Guangqing,
Zhang Xinyi,
Shu Xia,
Lv Jun,
Wu Yucheng
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201901654
Subject(s) - photocatalysis , graphitic carbon nitride , nanodot , materials science , catalysis , visible spectrum , absorption (acoustics) , water splitting , hydrogen production , hydrogen , analytical chemistry (journal) , nanotechnology , optoelectronics , chemistry , biochemistry , organic chemistry , chromatography , composite material
Graphitic carbon nitride loaded with MoS x nanodots (MoS x /g‐C 3 N 4 ) was synthesized through a sonochemical method. MoS x nanodots (3∼20 nm) are shown to have the same excellent co‐catalytic H 2 evolution performance as that of Pt. Nevertheless, the photocatalytic activity of MoS x /g‐C 3 N 4 decreased with time. To overcome this instability, we show that co‐incorporation of Ni can significantly reduce the photo‐corrosion. The rate of H 2 evolution of Ni−MoS x /g‐C 3 N 4 photocatalyst reaches a maximum of 5968 μmol h −1 g −1 , which is 89 % higher than that of Pt/g‐C 3 N 4 . The element mapping images show that Ni is deposited on the surface of MoS x . The co‐presence of Ni and MoS x not only enhance optical light absorption by g‐C 3 N 4 , but also significantly improve the separation efficiency of photocarriers and thus the photocatalytic hydrogen evolution efficiency.