PbS量子点修饰中空CeO_(2)复合微球及光催化降解罗丹明B性能研究  

Photocatalytic degradation performance of rhodamine B by PbS quantum dot-modified hollow CeO_(2)composite microspheres

作　　者：王博媛 蔡承世 宗一超 袁军[1] 张富青[1] Wang Boyuan;Cai Chengshi;Zong Yichao;Yuan Jun;Zhang Fuqing(Wuhan Institute of Technology,Wuhan 430073)

机构地区：[1]武汉工程大学,武汉430073

出　　处：《化工新型材料》2023年第5期299-305,共7页New Chemical Materials

基　　金：绿色化工过程教育部重点实验室基金(GCP20200210、GCX2021122);湖北省新型反应器与绿色化工工艺重点实验室(40201007);武汉工程大学科学研究基金(K202045)。

摘　　要：制备了PbS量子点(PbSQDs)修饰的中空CeO_(2)微球(PbS@h-CeO_(2))。通过SEM、TEM、XRD和XPS测试复合材料的形貌和结构,通过UV-Vis、电化学和稳态荧光测试其光电性能。结果发现,复合材料为直径约700~800nm的中空纳米微球。对复合材料进行光催化降解RhB的性能测试表明,PbS@h-CeO_(2)-30在30min暗吸附和150min可见光照条件下可去除78.4%的RhB,同样条件下h-CeO_(2)只能去除37%的RhB。结果表明,引入PbSQDs修饰h-CeO_(2)后,通过量子点调节光的吸收范围,提高光生电子-空穴的分离效率,从而提高光催化性能。最后推导出其催化增强机理。PbS quantum dots(PbSQDs)-modified hollow CeO_(2)microspheres(PbS@h-CeO_(2))were synthesized.The morphology and structure of the composites(PbS@h-CeO_(2))were tested by SEM,TEM,XRD and XPS,and the photoelectronic properties were tested by UV-Vis,EIS,MS and PL test.The SEM and TEM tests showed that the composites were regular hollow microspheres with diameters of about 700~800nm.The photocatalytic degradation performance of RhB by the composites was tested and it was found that PbS@h-CeO_(2)-30 could remove 78.3%of RhB under dark adsorption for 30min and visible light irradiation for 150min,while h-CeO_(2)could only remove 37%of RhB under the same conditions.The results indicated that after the introduction of PbSQDs to modify h-CeO_(2),the separation efficiency of photo-generated electrons and holes was improved by adjusting the light absorption range through quantum dots,thereby enhancing the photocatalytic performance.Finally,its photocatalytic enhancement mechanism was deduced.

关 键 词：二氧化铈 PbS量子点 中空微球 光催化降解 

分 类 号：TQ133.3[化学工程—无机化工]