AgNi双金属改性多面体钒酸铋的制备及光催化性能  

Preparation and photocatalytic performance of AgNi bimetallic modified polyhedral bismuth vanadate

作　　者：李军 李会鹏[1] 赵华[1] 刘钦龙 LI Jun;LI Huipeng;ZHAO Hua;LIU Qinlong(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun,Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学石油化工学院,抚顺113001

出　　处：《无机化学学报》2024年第3期601-612,共12页Chinese Journal of Inorganic Chemistry

基　　金：辽宁省教育厅项目(No.LJKMZ20220721)资助。

摘　　要：采用简单的水热法制备了多面体钒酸铋(BVO)材料,又通过化学还原法首次在BVO上原位合成了一种小尺寸的AgNi双金属助催化剂并研究了其光催化性能。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、紫外可见漫反射光谱(UV-Vis DRS)、X射线光电子能谱(XPS)、光致发光(PL)光谱、N2吸附-脱附等手段对制备的AgNi/BVO材料的理化性能进行了表征。结果表明,AgNi双金属广泛负载在这种特殊形貌的BVO多面体表面,大大增加了金属的附着位点,同时AgNi负载也提高了BVO的结晶性。银表面等离子体谐振效应与镍的共格界面效应增强了BVO催化剂对可见光的吸收,增强了光生电子的分离,提高了光催化活性。光催化降解MB (亚甲基蓝)实验表明,当Ag、Ni的质量比为3∶1时,AgNi/BVO的催化活性最高,在可见光照射下其反应速率常数是BVO的5.4倍,该光催化剂在4次循环后仍能保持良好的光催化活性。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.

关 键 词：钒酸铋 双金属 催化剂 光催化 

分 类 号：O643.32[理学—物理化学]