期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 514, 期 -, 页码 98-106出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2016.11.058
关键词
g-C3N4; NiMoO4; Visible light responsive; Heterojunction; RhB degradation; Hydrogen generationa
资金
- Natural Science Foundation of Zhejiang Province in China [LY14B030002, LY16B030002]
- National Undergraduate Training Program for Innovation and Entrepreneur-ship [201610345023]
- Zhejiang Provincial Science and Technology Key Innovation Team [2011R50012]
- Zhejiang Provincial Key Laboratory [2013E10022]
A novel NiMoO4/g-C3N4 composite with heterojunction structure was prepared via a simple mixingcalcination method and used as a photocatalyst for rhodamine B (RhB) degradation and hydrogen generation under visible light irradiation. Multiple techniques, such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UVvis diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy, were applied to investigate the physical and photo properties of the catalysts. Results indicated that the synthesized NiMoO4/g-C3N4 composite can produce hydrogen 4.4 times faster than pure g-C3N4 under visible light irradiation. When the composite was applied in photodegradation of RhB, it was found that the introduction of NiMoO4 nanorods into g-C3N4 can promote the photoabsorption performance and the adsorption of RhB, both of which benefit the photocatalytic reaction. Nevertheless, more important is the formed heterojunction between NiMoO4 and g-C3N4 efficiently retards the recombination of electron-hole pairs, which subsequently significantly promotes the photocatalytic activity. The degradation rate of the optimal NiMoO4/g-C3N4 reaches 0.044 min(-1), which is 4.0 times that of pure g-C3N4. The proposed mechanism for the enhanced visible-light photocatalytic activity of NiMoO4/g-C3N4 composite is further evidenced by photoluminescence spectroscopy and photocurrent experiments. (C) 2016 Elsevier B.V. All rights reserved.
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