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Fabrication of WO 2.72 /UiO‐66 nanocomposites and effects of WO 2.72 ratio on photocatalytic performance: judgement of the optimal content and mechanism study
Author(s) -
Zhang Qingsong,
Yang Jinghua,
Xu Min,
Chen Jinxi,
Lou Yongbing,
Zhou Jiancheng,
Cheng Lin
Publication year - 2018
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5627
Subject(s) - photocatalysis , methyl orange , nanocomposite , materials science , nanorod , x ray photoelectron spectroscopy , hydrothermal circulation , nanotechnology , nanomaterials , heterojunction , chemical engineering , catalysis , chemistry , optoelectronics , organic chemistry , engineering
BACKGROUND Recently, hybrid nanocomposites based on metal–organic frameworks (MOFs) and inorganic nanomaterials have been actively investigated as a potential technology for solving the environmental pollution problems. However, to our knowledge, there have been no composites of WO 2.72 and MOFs reported until now. In this study, highly dispersed WO 2.72 nanorods were first grown in situ upon UiO‐66 through a hydrothermal process. RESULTS The optimal content of the WO 2.72 (30 wt%) could be intuitively judged by field emission scanning electron microscopy. The degradation efficiency of methyl orange (MO) in photocatalysis with 30 wt% WO 2.72 loading exhibited better photocatalytic activity than bare UiO‐66, WO 2.72 and other WO 2.72 loadings. The enhancement of photocatalytic activity over hybrid WO 2.72 /UiO‐66 can be ascribed to the difference of conduction band between WO 2.72 and UiO‐66, which could cause the photoelectron inject to the WO 2.72 from UiO‐66, and the lone pair electrons of –OH and –COOH groups of the UiO‐66, which not only repel excited electrons but also attract photogenerated holes. CONCLUSIONS The enhanced separation of photoexcited carriers between WO 2.72 and UiO‐66 led to the enhancement of photocatalytic activity. The photocatalytic reaction mechanism for MO treatment was also studied. © 2018 Society of Chemical Industry