TY - JOUR
T1 - Visible light photocatalytic activity enhancement of Ag3PO4 dispersed on exfoliated bentonite for degradation of rhodamine B
AU - Ma, Jianfeng
AU - Liu, Qing
AU - Zhu, Lifang
AU - Zou, Jing
AU - Wang, Kai
AU - Yang, Meirong
AU - Komarneni, Sridhar
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - To improve catalytic efficiency and reduce the amount of silver consumption, nanophase of silver phosphate was dispersed on an exfoliated bentonite (EB) to prepare the EB-Ag3PO4 photocatalyst. The as-synthesized samples were characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Ultraviolet-vis (UV-vis) diffuse reflectance spectroscopy (DRS) and the Brunauer, Emmett, and Teller (BET) method. The composites were obtained with very fine nanoparticles of Ag3PO4 spread on the thin layers of exfoliated bentonite in order to improve the photocatalytic activity by exposing higher surface area of Ag3PO4. An optimized EB-Ag3PO4 composite showed much higher degradation of rhodamine B than that of the pure Ag3PO4 under visible light irradiation on a per mole basis of Ag3PO4. In addition, degradation efficiency of Ag3PO4 was apparently improved by compositing with exfoliated bentonite based on the kinetics of degradation data. The RhB degradation by EB-Ag3PO4-3 composite reached about 95% within 21min under visible light irradiation, which is much higher than that of Ag3PO4 (82%). The results of improved photoactivity were mainly attributed to the electrostatic interaction between Ag3PO4 and negatively charged exfoliated bentonite, efficient migration of the photogenerated electrons and holes occurred in nanocomposite. This study reports a highly efficient and cost-effective photocatalyst for dye pollutant degradation and a potential photoelectric material.
AB - To improve catalytic efficiency and reduce the amount of silver consumption, nanophase of silver phosphate was dispersed on an exfoliated bentonite (EB) to prepare the EB-Ag3PO4 photocatalyst. The as-synthesized samples were characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Ultraviolet-vis (UV-vis) diffuse reflectance spectroscopy (DRS) and the Brunauer, Emmett, and Teller (BET) method. The composites were obtained with very fine nanoparticles of Ag3PO4 spread on the thin layers of exfoliated bentonite in order to improve the photocatalytic activity by exposing higher surface area of Ag3PO4. An optimized EB-Ag3PO4 composite showed much higher degradation of rhodamine B than that of the pure Ag3PO4 under visible light irradiation on a per mole basis of Ag3PO4. In addition, degradation efficiency of Ag3PO4 was apparently improved by compositing with exfoliated bentonite based on the kinetics of degradation data. The RhB degradation by EB-Ag3PO4-3 composite reached about 95% within 21min under visible light irradiation, which is much higher than that of Ag3PO4 (82%). The results of improved photoactivity were mainly attributed to the electrostatic interaction between Ag3PO4 and negatively charged exfoliated bentonite, efficient migration of the photogenerated electrons and holes occurred in nanocomposite. This study reports a highly efficient and cost-effective photocatalyst for dye pollutant degradation and a potential photoelectric material.
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U2 - 10.1016/j.apcatb.2015.09.004
DO - 10.1016/j.apcatb.2015.09.004
M3 - Article
AN - SCOPUS:84942031981
SN - 0926-3373
VL - 182
SP - 26
EP - 32
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -