NDLI: Preparation of network-like ZnO–FeWO<sub>4</sub> mesoporous heterojunctions with tunable band gaps and their enhanced visible light photocatalytic performance

Content Provider	Royal Society of Chemistry (RSC)
Author	Qu, Dan Shi, Jinsheng Liu, Jing Yi, Ying Ma, Yongchao Zhang, Wei Jiang, Haiyan Han, Zhongzhi Kang, Wukui Guo, Yunhua
Copyright Year	2015
Abstract	Novel mesoporous ZnO–FeWO4 (Zn–FeWO4) heterojunctions with network-like structure were synthesized with a combination of thermal decomposition and hydrothermal methods. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), N2 sorption and Brunauer–Emmett–Teller (BET) surface area analysis, diffuse reflection spectroscopy (DRS) and photoluminescence spectroscopy (PL). The results showed that the size of FeWO4 was reduced by the modification of ZnO. With the increasing molar ratio of ZnO to FeWO4, the quantum size of FeWO4 decreased from 11 nm to 4 nm, as is followed by a surprisingly band gap broadening. Photocatalytic activity toward the degradation of RhB under visible light irradiation was investigated. The optimum decomposition rate of RhB using the prepared 1.5Zn–FeWO4 heterojunction was almost 39 and 9.7 times that of pristine ZnO and FeWO4, respectively. The active species trapping experiments showed that the holes exhibited an obvious influence on the photocatalytic degradation process. The study on the mechanism showed that the enhanced photocatalytic activity was mainly ascribed to heterojunction construction and band gap broadening, which enhance the efficient transfer and the oxidation potential of holes. This heterojunction shows a potential industrial application to remove undesirable organics from the environment.
Starting Page	5612
Ending Page	5620
Page Count	9
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	39
Issue Number	7
Journal	New Journal of Chemistry
DOI	10.1039/c5nj00900f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Spectroscopy Diffuse reflection Photoluminescence Photoemission spectroscopy Concentration Scanning electron microscope Quantum tunnelling X-ray crystallography Sorption Emmett Mesoporous material Transmission electron microscopy Hydrothermal circulation Band gap X-ray photoelectron spectroscopy The Samples Heterojunction
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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