Abstract: ZnxCd1?xS/TiO2 nanofibers were successfully synthesized by the combination of electrospinning technique and hydrothermal method. These nanofibers were characterized for the structural，optical，and morphological properties by XRD，SEM，UV-vis，EDS and BET. The result showed that ZnxCd1?xS nanoparticles could tightly grow on the TiO2 nanofibers surface and thus ZnxCd1?xS/TiO2 heterostructures composite materials were successfully obtained. The UV-vis analysis indicated that the absorption spectrum of the sample was extended to the visible light region. Compared with pure TiO2 fibers，ZnxCd1?xS/TiO2 nanofibers exhibited enhanced photocatalytic activity in the decomposition of Rhodamine B(RB) under visible light. When the hydrothermal time was 24 h，the decoloration rate of the sample could reach 90.87% in one hour，which owed the best photlcatalytic activity，and was easily separated，removed from the system after reaction and reuse.

Key words: electrospinning, hydrothermal method, ZnxCd1?xS/TiO2, photocatalysis

摘要： 通过静电纺丝和水热法联用成功制备了ZnxCd1?xS/TiO2纳米纤维。利用XRD、SEM、UV-vis、EDS、BET等分析测试手段对样品的结构、光学性能及形貌进行表征。用罗丹明B（RB）模拟有机污染物进行了光催化降解实验。结果表明，在TiO2纳米纤维上长了一层致密地ZnxCd1?xS颗粒，形成了ZnxCd1?xS/TiO2异质结复合纤维，且其光谱响应范围拓宽至可见光区，与纯TiO2纳米纤维相比，可见光催化活性明显提高。当水热时间为24 h时，ZnxCd1?xS/TiO2复合纤维的光催化活性最高，RB溶液在可见光下降解1 h，脱色率达到90.87%，并且该样品易于分离、回收和再利用。

关键词: 静电纺丝, 水热法, ZnxCd1?xS /TiO2, 光催化