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Direct Generation of Fine Bi 2 WO 6 Nanocrystals on g‐C 3 N 4 Nanosheets for Enhanced Photocatalytic Activity
Author(s) -
Yin Wenjie,
Bai Song,
Zhong Yijun,
Li Zhengquan,
Xie Yi
Publication year - 2016
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201600041
Subject(s) - photocatalysis , materials science , nanocrystal , nanocomposite , graphitic carbon nitride , heterojunction , nucleation , chemical engineering , composite number , nanotechnology , nitride , degradation (telecommunications) , composite material , optoelectronics , catalysis , chemistry , layer (electronics) , organic chemistry , telecommunications , computer science , engineering
Graphitic carbon nitride (g‐C 3 N 4 ) coupled with Bi 2 WO 6 is a promising Type II heterojunction, but it is still difficult to obtain uniform nanocomposites of these materials with the present assembly methods. Here we employ g‐C 3 N 4 nanosheets saturated with Bi 3+ ions to provide numerous and widespread nucleation sites for the growth of Bi 2 WO 6 nanocrystals. As a result, g‐C 3 N 4 nanosheets loaded with fine and controllable amount of Bi 2 WO 6 nanocrystals are produced. The g‐C 3 N 4 /Bi 2 WO 6 nanocomposites exhibit significantly enhanced photocatalytic activity for RhB degradation under visible‐light irradiation. Particularly, the g‐C 3 N 4 /70 % Bi 2 WO 6 nanocomposite achieves the highest photocatalytic activity, and the average rate constant is almost 5 and 9 times higher than those of bare g‐C 3 N 4 and Bi 2 WO 6 , respectively. Moreover, the composite exhibits high photocatalytic stability in cycling tests.