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A Novel CdS /g‐ C 3 N 4 Composite Photocatalyst: Preparation, Characterization and Photocatalytic Performance with Different Reaction Solvents under Visible Light Irradiation
Author(s) -
Ye Xiangju,
Dai Xia,
Meng Sugang,
Fu Xianliang,
Chen Shifu
Publication year - 2017
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201600251
Subject(s) - photocatalysis , nitrobenzene , benzyl alcohol , chemistry , aniline , benzaldehyde , graphitic carbon nitride , diffuse reflectance infrared fourier transform , photochemistry , nuclear chemistry , scanning electron microscope , visible spectrum , catalysis , organic chemistry , materials science , optoelectronics , composite material
CdS /graphtic carbon nitride ( CdS /g‐ C 3 N 4 ) hybrid materials were fabricated by thermal polymerization and hydrothermal methods using Cd( CH 3 COO ) 2 • 2H 2 O , thioacetamide, and melamine as precursors. The structural and optical properties of the as‐synthesized samples were investigated by X‐ray powder diffraction, UV –vis diffuse reflectance spectroscopy, scanning electron microscopy, transmission electron microscopy, etc . A coupled system toward the selective oxidation of benzyl alcohol to benzaldehyde and the reduction of nitrobenzene into aniline was used to estimate the photocatalytic performance of CdS /g‐ C 3 N 4 composite photocatalysts under visible light illumination. Results indicate that the CdS /g‐ C 3 N 4 sample exhibits an outstanding photocatalytic performance for selective oxidation of benzyl alcohol and reduction of nitrobenzene. Meanwhile, benzotrifluoride is the best reaction medium among the screened solvents. Further research demonstrates that the selective oxidation of benzyl alcohol to benzaldehyde is induced by the photoexcited holes and the reduction of nitrobenzene into aniline is triggered by the photoexcited electrons. Additionally, the catalyst can be recycled several times without noticeable deactivation.