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Solvothermal Synthesis of TiO 2 /Bi 2 WO 6 Heterojunction Photocatalyst with Optimized Interface Structure and Enabled Photocatalytic Performance
Author(s) -
Jiang Linpeng,
Wang Shujie,
Shi Liyi,
Zhao Yin,
Wang Zhuyi,
Zhang Meihong,
Yuan Shuai
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.201600563
Subject(s) - heterojunction , photocatalysis , photoluminescence , ethylene glycol , chemistry , crystal structure , semiconductor , chemical engineering , nanotechnology , materials science , optoelectronics , crystallography , catalysis , organic chemistry , engineering
TiO 2 /Bi 2 WO 6 (TB) heterojunction photocatalyst was successfully synthesized and characterized by XRD, SEM, TEM, UV–vis and photoluminescence measurement. The heterojunction interface structure of TB heterojunction photocatalyst was optimized via adjusting the ethylene glycol/water (EG/W) ratio. Based on XRD, SEM and TEM, the crystal size of Bi 2 WO 6 reduced from 14.6 nm to 8.8 nm, and the interface structure between Bi 2 WO 6 nanosheets and TiO 2 particle significantly changed with increasing EG concentration. Furthermore, the photocatalytic activity and the related mechanism of TB heterojunction photocatalyst were systematically discussed. Among them, TB EG /W sample shows the highest normalized apparent rate constant, which is attributed to its highest electron–hole pairs separation ability driven by optimized heterojunction interface between two semiconductors.