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Triple‐Mode Bi 2 WO 6 /Pg‐C 3 N 4 @rGO Core‐Shell Synergistic Effect with Enhanced Light‐induced Photocatalytic Activity
Author(s) -
Guo Xiaofeng,
Wang Hongbo,
Wang Liying,
Zeng Defen,
Xiang Qian,
Chai Ba
Publication year - 2019
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.11675
Subject(s) - photocatalysis , ternary operation , materials science , tungstate , heterojunction , graphene , graphitic carbon nitride , bismuth , oxide , composite number , chemical engineering , nanotechnology , catalysis , composite material , chemistry , optoelectronics , organic chemistry , metallurgy , computer science , engineering , programming language
Synthesizing composites is one of the most effective ways to reduce the recombination probability of electron–hole pairs and to improve photocatalytic activity. In this study, our research group first combined reduced graphene oxide (rGO) with porous graphitic carbon nitride (pg‐C 3 N 4 ) to form pg‐C 3 N 4 @rGO core‐shell, and then loaded bismuth tungstate (Bi 2 WO 6 ) onto the pg‐C 3 N 4 @rGO to acquire a ternary composite catalyst. The results of the experiment show that, the ternary photocatalyst exhibited better phototalytic performance than pure pg‐C 3 N 4 and Bi 2 WO 6 . When the weight radio of pg‐C 3 N 4 @rGO and Bi 2 WO 6 was 100:8, the ternary photocatalyst showed the best photocatalytic performance. Its photocatalytic kinetic constant reached 68 × 10 −4 min −1 , which was 13.6 times that of pg‐C 3 N 4 and 7.6 times that of Bi 2 WO 6 . The photocatalytic performance was boosted by the heterojunction structure of the ternary composite, which can effectively separate electron–hole pairs rapidly, and thereby increased quantum yield, thus improving the photocatalytic performance.