Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 210, Issue -, Pages 125-134Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2018.07.059
Keywords
BiOCOOH/g-C3N4; Visible light; Photocatalysis; Amido black 10B dye
Categories
Funding
- National Natural Science Foundation of China [51508254, 41771341]
- Fundamental Research Funds for the Central Universities [lzujbky-2017-it98]
- College students' innovative practice training program of Chinese Academy of Sciences [Y710171040]
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
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The application of semiconductor photocatalysts in wastewater treatment has received increasingly attentions because of its potential utilization of solar energy. In this study, a novel visible-light-driven (VLD) BiOCOOH/gC(3)N(4) composite photocatalyst was successful synthesized by a facile hydrothermal method. Afterwards, physicochemical properties of the resulting samples were investigated through X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) surface areas, UV-visible diffuse reflectance spectroscopy (UV-vis DRS), transient photocurrent density, Mott-Schottky (M - S) and electrochemical impedance spectroscopy (EIS) measurement. Furthermore, the visible light photocatalytic (PC) performance was evaluated through the degradation of amido black 10B dye. All results indicated that the combination of g-C3N4 and BiOCOOH could exhibited greatly visible light absorbance and photo-generated charge separation efficiency, thereby resulting in the enhanced PC performance of BiOCOOH/g-C3N4 composite photocatalyst. The optimal Bi/C molar rate in BiOCOOH/g-C3N4 composite was determined to be 1/1, and the corresponding photodegradation rate for amido black 10B was 0.01794 min(-1), which was nearly 2.19 and 5.73 folds higher than that of pure g-C3N4 and BiOCOOH. The possible mechanism of the PC reaction was also discussed in detail. Furthermore, BiOCOOH/g-C3N4 composite photocatalyst performed good reusability and stability even after four recycle utilization.
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