层状钛铌酸与硫化镉的复合材料制备及光催化性能  

Preparation and Photo-catalytic Property of the Composites of HTiNbO_5 and CdS

作　　者：段文峰 刘淑敏[1] 郭宪吉[1] DUAN Wenfeng;LIU Shumin;GUO Xianji(College of Chemistry and Molecular Engineering,Zhengzhou University,Zhengzhou 450001,China;School of CMI Engineering,Luoyang Institute of Science and Technology,Luoyang 471023,China)

机构地区：[1]郑州大学化学与分子工程学院,郑州450001 [2]洛阳理工学院土木工程学院,河南洛阳471023

出　　处：《湖北民族学院学报（自然科学版）》2018年第3期272-276,299,共6页Journal of Hubei Minzu University(Natural Science Edition)

基　　金：国家自然科学基金项目(J1210060)

摘　　要：以层状HTiNbO_5为主体,CdS为客体,四丁基氢氧化铵为剥离剂,先将HTiNbO_5剥离成纳米层片,然后与在系统中原位形成的CdS复合,在TiNbO_5^-纳米层片重堆积过程中,CdS负载到钛铌酸表面或嵌入到钛铌酸层间,形成二元复合材料CdS-eHTiNbO_5.应用XRD和DR-UV-Vis技术对材料的结构及光吸收性质进行了表征.考察了材料在罗丹明B光降解反应中的催化性能,与单一的HTiNbO_5及单一的CdS相比较,CdS-eHTiNbO_5在可见光条件下罗丹明B降解反应中的催化活性有显著提升,表明HTiNbO_5与CdS之间存在协同促进作用.随复合材料中CdS量的增加,催化活性总体呈升高趋势.CdS-eHTiNbO_5经氮掺杂后,光催化效率明显降低,表明氮掺杂能抑制HTiNbO_5与CdS之间的协同作用.By using layered HTiNbO5 as the host,CdS as the guest,and tetrabutylammonium hydroxide as the exfoliating agent,the composites of layered HTiNbO5 and CdS were prepared through exfoliating-reassembling route,in which layered HTiNbO5 was exfoliated firstly,producing single nanosheets,then the exfoliated sheets reassembled in the presence of CdS,which was formed in situ.Thus,the CdS particles were loaded on surface of the reassembled HTiNbO5 or inserted into the interlayers,generating the binary composites（ abbreviated as CdS-eHTiNbO5）.XRD and DR-UV-Vis techniques were employed to characterize the structure and photoabsorption performance of the obtained materials. Further,the photocatalytic performance of the composites in photo-degradation reaction of rhodamine B was investigated. Compared with pureHTiNbO5 and pure CdS,the CdS-eHTiNbO5 materials showed an excellent catalytic activity under visible-light irradiation,and with increasing CdS amounts in the composites,the catalytic activity increased. The result validated that there was a synergy between HTiNbO5 and CdS for photo-degradation reaction of rhodamine B.After the binary CdS-eHTiNbO5 samples were doped with nitrogen,their catalytic activity decreased significantly,indicating that the synergy interaction between HTiNbO5 and CdS could be restrained upon nitrogen doping.

关 键 词：钛铌酸纳米层片 剥离-重堆积技术 HTiNbO5与CdS复合材料 光催化降解 协同促进作用 

分 类 号：O643.3[理学—物理化学]