Open AccessEnhanced visible photocatalytic activity in flower‐like CuO–WO 3 –Bi 2 WO 6 ternary hybrid through the cascadal electron transfer
Author(s) -
Liu Zhenxing,
Yu Qianqian,
Liu Jin,
Li Tao,
Huang Fengtao
Publication year - 2017
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.2016.0374
Subject(s) - materials science , photoluminescence , ternary operation , photocatalysis , analytical chemistry (journal) , heterojunction , visible spectrum , diffuse reflectance infrared fourier transform , photocurrent , scanning electron microscope , diffuse reflection , optoelectronics , chemistry , optics , computer science , programming language , catalysis , biochemistry , physics , chromatography , composite material
The flower‐like CuO–WO 3 –Bi 2 WO 6 with p–n–n heterostructure was prepared via a simple two‐step approach, which was using hydrothermal method synthesising WO 3 –Bi 2 WO 6 and subsequent CuO recombination through impregnation‐calcination technique. The products were characterised by X‐ray powder diffraction, energy dispersion spectroscopy, scanning electronic microscopy, transmission electron microscopy, nitrogen sorption measurements (BET), UV–vis diffuse reflectance spectra, photoluminescence (PL) emission spectra, photocurrent transient responses and EIS Nyquist plots. The photodegradation results of products under visible light irradiation revealed the order: CuO–WO 3 –Bi 2 WO 6 (0.3:0.2:1) > CuO–WO 3 –Bi 2 WO 6 (0.5:0.2:1) > CuO–WO 3 –Bi 2 WO 6 (0.1:0.2:1) > CuO–Bi 2 WO 6 > WO 3 –Bi 2 WO 6 > Bi 2 WO 6 . The enhanced activity can be attributed to the p–n–n type heterojunction, which resulted in the cascade electron transfer from CuO to Bi 2 WO 6 and then to WO 3 through the interfacial potential gradient in the ternary hybrids conduction bands and improved separation rate of photogenerated charge carriers.