Cd(OH)_(2)/BiOCl复合材料的制备及其光催化性能  

Preparation and photocatalytic performance of Cd(OH)_(2)/BiOCl composite materials

作　　者：代佳汐 姜建辉 韩宇凡[1,2] 张文涛 田明霞 张园 DAI Jiaxi;JIANG Jianhui;HAN Yufan;ZHANG Wentao;TIAN Mingxia;ZHANG Yuan(Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and ConstructionCorps,Alar 843300,China;College of Chemistry and Chemical Engineering,Tarim University,Alar 843300,China)

机构地区：[1]新疆兵团南疆化工资源利用工程实验室,新疆阿拉尔843300 [2]塔里木大学化学化工学院,新疆阿拉尔843300

出　　处：《工业水处理》2024年第9期136-142,共7页Industrial Water Treatment

基　　金：大学生创新创业训练计划项目(202210757028);兵团财政科技计划资助项目(2022DB025,2021CB014)。

摘　　要：BiOCl是一种良好的光催化剂,但光生电子-空穴对易复合限制了其在光催化领域的应用。采用一步水热法制备了Cd(OH)_(2)/BiOCl复合材料,以罗丹明B(RhB)为降解目标,考察了复合材料的光催化性能。利用XRD、FT-IR、SEM、XPS(X射线光电子能谱)、光致发光光谱(PL)、电子自旋共振光谱(ESR)、紫外可见漫反射光谱(UV-Vis DRS)等手段对复合材料进行了表征,从表征结果发现,Cd(OH)_(2)与BiOCl复合后,复合材料呈片状球形花状结构,且Cd(OH)_(2)的引入使复合材料产生了新的能级,电荷分离和传输能力增强,光生电子-空穴对的复合得到明显抑制,从而提高了复合材料的光催化性能。在300 W氙灯照射下,Cd(OH)_(2)/BiOCl复合材料对RhB的去除率较纯BiOCl提高了15.36%,经5次循环利用后复合材料对RhB的去除率仍可保持在70%。自由基清除实验表明自由基的活性顺序为O_(2)·->h+>·OH,且O_(2)·-是主要活性物质。BiOCl is a good photocatalyst,but the easy recombination of photo generated electron-hole pairs limits its application in the field of photocatalysis.Cd(OH)_(2)/BiOCl composite materials were prepared by one-step hydrothermal method,and its photocatalytic performance was investigated with Rhodamine B(RhB)as the degradation target.The composite materials were characterized by XRD,FT-IR,SEM,XPS,PL,ESR,UV-Vis DRS and other methods.It was found that the composite materials of Cd(OH)_(2)/BiOCl exhibited a sheet-like spherical flower-like structure,and the introduction of Cd(OH)_(2)generated new energy levels in the composite material,with enhanced charge separation and transport capabilities,and significantly suppressed the recombination of photo generated electron-hole pairs,which improved the photocatalytic performance of the composite materials.Under 300 W xenon lamp irradiation,the removal rate of RhB by Cd(OH)_(2)/BiOCl composite materials increased by 15.36%compared to pure BiOCl.After 5 cycles of utilization,the removal rate of RhB by the composite materials could still be maintained at 70%.The free radical scavenging experiment showed that the activity order of free radicals was O_(2)·->h+>·OH,with O_(2)·-being the main active substance.

关 键 词：Cd(OH)2/BiOCl 光催化性能 罗丹明B 催化机理 

分 类 号：X703[环境科学与工程—环境工程]