| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Preparation and Visible-light Photocatalytic Activity of Ag@AgCl/Bi2WO6Composite Photocatalyst |
| AN Weijia, TIAN Lingyu, RUI Yulan, GAO Yameng, CUI Wenquan
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| College of Chemical Engineering, North China University of Science and Technology, Tangshan 063210 |
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Abstract Three-dimensional composites of flower-like Bi2WO6 decorated with Ag@AgCl nanoparticles (designated Ag@AgCl/Bi2WO6) were prepared via a simple precipitation method, and were subsequently characterized for structure and performance evalutation by using XRD, UV-Vis, SEM, TEM, EDX, SAED, and photoelectric test. Moreover, the products’ photocatalytic activity was investigated by the degradation reaction of Rhodamine B (RhB) under visible light irradiation. The experimental results confirmed the uniform distribution of Ag@AgCl nanoparticles, with an average particle size of 50 nm, on the surface of Bi2WO6. The Ag@AgCl/Bi2WO6 composites exhibit excellent UV-vis absorption due to the surface plasmonic resonance (SPR) of Ag nanoparticles. Meanwhile, the introduction of Ag@AgCl nanoparticles can greatly accelerate the separation of photogenerated carriers, thus improving the photocatalytic activity of the resultant composite materials. In the photocatalysis test achieved a degradation rate as high as 95% of RhB (250 mL, 10 mg/L) with the presence of 0.25 g Ag@AgCl(20wt%)/Bi2WO6 photocatalyst under visible light irradiation. In addition, it was determined by quenching test that the O2-, h+ and ·OH acts as main active species during the photocatalytic degradation process. Based on the experimental and theoretical results, the possible photocatalytic mechanism was proposed.
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Published: 31 May 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51672081), Natural Science Foundation of Hebei Province, China (B2018209356), the Natural Science Foundation for youth of North China University of Technology (Z201503). |
| About author:: Weijia Anreceived his M.S. degree in April 2015 from North China University of Technology in engineering. Since then worked at the School of Chemical Engineering, North China University of Technology, April 2015, focusing on the preparation and characte-rization of photocatalytic materials.Lingyu Tianreceived her M.S. degree in April 2019 from North China University of Technology in engineering, focusing on the preparation and characterization of photocatalytic materials. |
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2019, Vol. 33 
