Open AccessSynthesis of flower‐like WO 3 /Bi 2 WO 6 heterojunction and enhanced photocatalytic degradation for Rhodamine B
Author(s) -
Zhu Zhenfeng,
Yan Ying,
Li Junqi
Publication year - 2015
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2015.0147
Subject(s) - photocatalysis , rhodamine b , materials science , photoluminescence , photocurrent , heterojunction , scanning electron microscope , hydrothermal circulation , visible spectrum , spectroscopy , chemical engineering , nanoparticle , degradation (telecommunications) , field emission microscopy , photochemistry , nanotechnology , optoelectronics , diffraction , catalysis , chemistry , optics , composite material , organic chemistry , telecommunications , physics , quantum mechanics , computer science , engineering
Flower‐like Bi 2 WO 6 microspheres were prepared by a facile hydrothermal process without any surfactant or template. The WO 3 /Bi 2 WO 6 samples were prepared by a simple heat treatment. The obtained samples were characterised by X‐ray diffraction, field emission scanning electron microscopy, photoluminescence spectra, transient photocurrent and UV–vis absorption spectroscopy. In the heterojunctions, WO 3 nanoparticles adhered to the surface of the three‐dimensional flower‐like hierarchical Bi 2 WO 6 . The WO 3 /Bi 2 WO 6 samples showed much higher photocatalytic activity than pure Bi 2 WO 6 did for Rhodamine B degradation under visible light irradiation. The improved photocatalytic activity is ascribed to the synergic effect between WO 3 and Bi 2 WO 6 in the framework, which led to the high transfer rate of photoinduced charge carriers. The possible photocatalytic mechanism of the composites is proposed to further understand the improvement in photocatalytic activity.