BiVO_(4)/GO纳米复合材料制备及其光催化性能研究  

Preparation of BiVO_(4)/GO composites and their photocatalytic performance

作　　者：王丽[1,2,3] 师兆忠 崔伟娜 周华 占桂荣 刘进[3,4] Wang Li;Shi Zhaozhong;Cui Weina;Zhou Hua;Zhan Guirong;Liu Jin(School of Material and Chemical Engineering,Kaifeng University,Kaifeng 475004,Henan China;Henan Engineering Research Center of Advanced Materials and Green Process,Kaifeng 475004,Henan,China;Henan Key Laboratory for Advanced Silicon Carbide Materials,Kaifeng 475004,Henan,China;Research Center of Functional Materials,Kaifeng University,Kaifeng 475004,Henan,China)

机构地区：[1]开封大学材料与化学工程学院,河南开封475004 [2]河南省先进材料与绿色过程工程技术研究中心,河南开封475004 [3]河南省先进碳化硅材料重点实验室,河南开封475004 [4]开封大学功能材料研究中心,河南开封475004

出　　处：《钢铁钒钛》2024年第2期51-57,共7页Iron Steel Vanadium Titanium

基　　金：河南省科技攻关项目(212102310507);河南省高等学校重点科研项目(22B150009,24B430013);河南省面上基金项目(222300420500);开封市科技攻关项目(2203057)。

摘　　要：钒酸铋(BiVO_(4))因其便宜易得、制备条件温和简单、窄带隙(~2.4 eV)、突出的光响应能力和优异的稳定性而在光催化领域受到广泛关注。以硝酸铋和偏钒酸铵为原料,采用水热法成功制备了鱼骨状钒酸铋/石墨烯(BiVO_(4)/GO)复合光催化材料,通过X射线粉末衍射、扫描电镜、透射电镜对复合光催化材料结构和形貌进行表征,并考察其模拟太阳光下对阿昔洛韦(AC)的降解活性。扫描电镜和透射电镜照片显示,钒酸铋(BiVO_(4))为独特的鱼骨状结构,GO片层穿插其间,将BiVO_(4)纳米结构很好地连接起来。GO的加入改变了BiVO_(4)原有的纯单斜白钨矿结构。BiVO_(4)/GO(BG-3)对AC的降解效率高达97.23%,循环使用5次后降解效率还可以达到87.15%,说明该催化剂具有良好的循环使用活性。采用Langmuir-Hinshelwood(L-H)一级动力学模型方程拟合催化降解过程,相关系数R2均大于0.99,说明L-H一级动力学模型方程非常适合于拟合该催化动力学过程。Bismuth vanadate(BiVO_(4))has attracted considerable attention in photocatalysis due to its cheap and easy availability,mild and simple preparation conditions,narrow bandgap(~2.4 eV),outstanding photoresponse ability,and excellent stability.A fishbone like bismuth vanadate/graphene(BiVO_(4)/GO)composite photocatalytic material was successfully prepared using bismuth nitrate and ammonium metavanadate as raw materials by hydrothermal method.The structure and morphology of the composite photocatalytic material were characterized by X-ray powder diffraction(XRD),scanning electron microscopy(SEM),and transmission electron microscopy(TEM),and its degradation activity for acyclovir under simulated sunlight was investigated.SEM and TEM show that BiVO_(4)has a unique fishbone like structure,with GO layers interspersed between them,effectively connecting the BiVO_(4)nanostructures.The addition of GO has changed the original pure monoclinic scheelite structure of BiVO_(4).The degradation efficiency of BiVO_(4)/GO(BG-3)for acyclovir(AC)is as high as 97.23%,and the degradation efficiency can still reach 87.15%after 5 cycles,indicating that the catalyst has good cycling activity.The Langmuir-Hinshelwood(L-H)first-order kinetic model equation was used to fit the catalytic degradation process,and the correlation coefficients R~2 were all higher than 0.97,indicating that the L-H first-order kinetic model equation is very suitable for fitting the catalytic degradation process.

关 键 词：BiVO_(4) GO 纳米复合材料 光催化 阿昔洛韦 

分 类 号：TB33[一般工业技术—材料科学与工程] TQ426[化学工程]