摘要
异质结的构建是提高光催化剂性能的有效途径.通过两步法,以BiOCl为基底原位生长CdSe纳米颗粒成功制备了一系列BiOCl/CdSe复合材料.利用XRD、SEM、TEM等对材料进行表征,结果证明CdSe在BiOCl表面均匀分布,并且BiOCl与CdSe之间成功构建了有效的异质结.在可见光照射下,与纯BiOCl和CdSe相比,复合材料在光催化降解四环素方面表现出优异的性能.其中,BC-1在1h内可有效降解81.7%的四环素.更重要的是,通过循环套用证明,该复合材料重复使用4次后仍有较高的稳定性.自由基捕获实验证明,空穴(h+)和超氧自由基(·O_(2)^(-))在降解过程中起着主要作用.
The construction of a heterojunction is an effective strategy to improve the performance of photocatalysts.A series of BiOCl/CdSe composites were successfully prepared by using BiOCl as a substrate for the in situ growth of CdSe nanoparticles in a two-step process.The composites were characterized via XRD,SEM,and TEM.The results showed that CdSe was evenly distributed on the BiOCl surface along with an effective heterojunction between BiOCl and CdSe.Compared with pure BiOCl and CdSe,the composites exhibited excellent photocatalytic degradation of tetracycline under visible-light irradiation.Among them,BC-1 effectively degraded 81.7%of tetracycline within 1 h.More importantly,the composite was proved to exhibit a high stability after four cycles.Free radical capture experi-ments showed that holes(h+)and superoxide radicals (·O_(2)^(-)) played an important role in the degradation process.
作者
陈立功
孙明明
王博威
李佳益
刘帅
方旺旺
Chen Ligong;Sun Mingming;Wang Bowei;Li Jiayi;Liu Shuai;Fang Wangwang(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;Zhejiang Shaoxing Institute of Tianjin University,Shaoxing 312300,China;Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang Center,Jieyang 522000,China;Tianjin Engineering Research Center of Functional Fine Chemicals,Tianjin 300350,China;Zhejiang Shaoxing Xingxin New Materials Co.,Ltd.,Shaoxing 312300,China)
出处
《天津大学学报（自然科学与工程技术版）》
EI
CAS
CSCD
北大核心
2023年第4期415-421,共7页
Journal of Tianjin University：Science and Technology
基金
国家自然科学基金资助项目(21978208)
中国博士后科学基金资助项目(2020T130465)
河北省科学技术厅资助项目(216Z1403G)
天津市绿色化学工程重点实验室开放项目(GCEPE201901012).
关键词
氯化氧铋
硒化镉
异质结
光催化技术
四环素
bismuth oxychloride(BiOCl)
cadmium selenide
heterojunction
photocatalytic technology
tetracycline
