ZnxCd1-xS/TiO2核壳型异质结的制备及其光催化性能

摘要

The ZnxCd1-xS/TiO2 core/shell nanofibers were successfully synthesized by the combination of electrospinning technique and hydrothermal method.The structure and other properties of samples were characterized by XRD,SEM,UV-vis,EDS and BET.The results showed that ZnxCd1-xS nanoparticles could tightly grow on the TiO2 nanofibers surface and thus ZnxCd1-xS/TiO2 core/shell heterostructures composite materials were successfully obtained.Compared with pure TiO2 fibers,ZnxCd1-x S/TiO2 core/shell nanofibers exhibite enhanced photocatalytic activity.By adjusting hydrothermal temperature,the coverage density of secondary ZnxCd1-xS layer as well as x value could be further controlled.When the hydrothermal temperature was 200 ℃,the x value was the highest with the best photocatalytic activity.%通过静电纺丝和水热法联用成功制备了Znx Cd1-xS/TiO2核壳纳米纤维.利用XRD、SEM、UV-vis、EDS、BET对样品结构等进行了表征.结果表明,在TiO2纳米纤维表面生长了一层致密的Znx Cd1-xS纳米颗粒,形成ZnxCd1-xS/TiO核壳型异质复合材料,且其光催化活性均比纯TiO2纳米纤维高.通过调节水热温度,可以控制ZnxCd1-xS表面形貌和x值.当水热温度为200℃时,x值最大,材料光催化活性最高.