复合催化剂Bi_(5)O_(7)I/g-C_(3)N_(4)的制备及其光催化降解盐酸四环素的研究  

Preparation of Bi_(5)O_(7)I/g-C_(3)N_(4) composite catalyst and study on its performance in photocatalytic degradation of tetracycline hydrochloride

作　　者：汪遵盛 姚振龙 张亚宣 贾徐锦 欧阳二明 WANG Zun-sheng;YAO Zhen-long;ZHANG Ya-xuan;JIA Xu-jin;OUYANG Er-ming(School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China;Jiluan Academy,Nanchang University,Nanchang 330031,China;School of Resources Environmental and Chemical Engineering,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学建筑工程学院,江西南昌330031 [2]南昌大学际銮书院,江西南昌330031 [3]南昌大学资源环境与化工学院,江西南昌330031

出　　处：《现代化工》2022年第4期140-144,150,共6页Modern Chemical Industry

基　　金：江西省自然科学基金面上项目(20192BAB206039);大学生创新创业训练计划项目(S202010403017)。

摘　　要：以三聚氰胺、五水合硝酸铋和碘化钾等为原料合成了一系列不同质量分数的复合催化剂Bi_(5)O_(7)I/g-C_(3)N_(4),利用XRD、SEM、XPS和UV-Vis等手段对其进行表征。研究了不同质量分数的复合催化剂Bi_(5)O_(7)I/g-C_(3)N_(4)光催化降解盐酸四环素的活性,并对其光催化反应机理进行了探索。结果表明,所制备的Bi_(5)O_(7)I/g-C_(3)N_(4)复合催化剂具有中空结构,其禁带宽度减小,光催化效率提高;在所有样品中Bi_(5)O_(7)I/g-C_(3)N_(4)-5%催化活性最高;在降解过程中起主要作用的活性基团是超氧自由基(·O_(2)^(-)),其次是羟基自由基(·OH),作用最小的是空穴(h^(+))。Using melamine,bismuth nitrate pentahydrate and potassium iodide as raw materials,a series of Bi_(5)O_(7)I/g-C_(3)N_(4) composite catalysts with different mass ratios are synthesized,and characterized by XRD,SEM,XPS and UV-Vis.The photocatalytic degradation activity of Bi_(5)O_(7)I/g-C_(3)N_(4) composite catalysts with different mass ratios is studied,and the photocatalytic reaction mechanism is explored.Results show that the prepared Bi_(5)O_(7)I/g-C_(3)N_(4)composite catalyst has a hollow structure,its band gap is reduced,and its photocatalytic efficiency is improved.Among all samples,Bi_(5)O_(7)I/g-C_(3)N_(4)-5%has the highest catalytic activity.Active group that plays a major role in the degradation process is superoxide radical(·O_(2)^(-)),followed by hydroxyl radical(·OH).The smallest is the hole(h^(+)).

关 键 词：盐酸四环素 Bi_(5)O_(7)I/g-C_(3)N_(4)复合催化剂 光催化 降解机理 

分 类 号：X787[环境科学与工程—环境工程]