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Visible Light Driven VO 2 /g‐C 3 N 4 Z‐Scheme Composite Photocatalysts for Selective Oxidation of DL‐1‐Phenylethyl Alcohol under Vis‐LEDs Irradiation and Aerobic Oxidation
Author(s) -
Ma Xiuqiang,
Huo Xiangyu,
Hao Kun,
Song Liang,
Yu Qing,
Liu Tong,
Wang Zhongwei
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202100141
Subject(s) - photocatalysis , catalysis , benzyl alcohol , irradiation , composite number , materials science , alcohol , photochemistry , nuclear chemistry , alcohol oxidation , electron paramagnetic resonance , visible spectrum , chemistry , organic chemistry , composite material , optoelectronics , nuclear magnetic resonance , physics , nuclear physics
A novel VO 2 /g‐C 3 N 4 Z‐Scheme type heterostructure composite photocatalyst was fabricated by the ultrasonic‐assisted method. The newly synthesized photocatalyst has been systematically and comprehensively characterized and analyzed. Through the selective oxidation of DL‐1‐Phenylethyl alcohol under Vis‐LED irradiation and aerobic oxidation, the photocatalytic performance of VO 2 /g‐C 3 N 4 photocatalyst was investigated. The results showed that the prepared VO 2 /g‐C 3 N 4 nanocomposites exhibited excellent photocatalytic oxidation performance. Among them, the highest turnover frequency (TOF) was 0.42 mmol (DL‐1‐Phenylethyl alcohol)⋅mmol −1 (catalyst)⋅h −1 , which was 5 times higher than the TOF of the original g‐C 3 N 4 . The effects of different wavelengths of LED monochromatic light, the composite ratio of VO 2 and g‐C 3 N 4 , the reaction time, and the different benzyl alcohol substrates were studied. Also, catalyst life test was completed. Furthermore, a persuasive mechanism of photocatalytic selective oxidation of DL‐1‐Phenylethyl alcohol on VO 2 /g‐C 3 N 4 photocatalyst was proposed through EPR and radical trapping experiments.