Preparation and photocatalytic performance of AgNi bimetallic modified polyhedral bismuth vanadate
Polyhedral bismuth vanadate(BVO)material was prepared using a straightforward hydrothermal method,and then a small-sized AgNi bimetallic co-catalyst was synthesized in situ on the surface of the polyhedral BVO through a chemical reduction method.The photocatalytic performance of the catalyst was studied.The physicochem-ical properties of the prepared AgNi/BVO material were characterized through various techniques,including X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),UV-Vis diffuse reflectance spectroscopy(UV-Vis DRS),X-ray photoelectron spectroscopy(XPS),photoluminescence(PL)spectros-copy,and nitrogen adsorption-desorption analysis.The results indicated that AgNi bimetallic co-catalysts were extensively loaded onto the unique morphology of BVO polyhedra,significantly increasing the metal attachment sites.Simultaneously,the AgNi loading also improved the crystallinity of BVO.The silver surface plasmon reso-nance effect,in conjunction with the nickel's lattice interface effect,enhanced the BVO catalyst's absorption of visi-ble light and improved the separation of photo-generated electrons,thereby increasing the photocatalytic activity.Photocatalytic degradation experiments using MB(methylene blue)as a model pollutant demonstrated that when the ratio was 3:1,AgNi/BVO exhibited the highest catalytic activity,with a reaction rate of 5.4 times higher than that of BVO under visible light irradiation.This photocatalyst retained excellent photocatalytic activity even after four cycles of use.
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维普
