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ZnxCd1?xS /TiO2异质结复合纤维的制备及其光催化性能

张 磊1,杨国锐2,常 薇1,2,延 卫2,3   

  1. 1西安工程大学环境与化学工程学院,陕西 西安 710048;2西安交通大学能源与动力工程学院,陕西 西安 710049; 3浙江温州轻工研究院,浙江 温州325003
  • 出版日期:2013-04-05 发布日期:2013-04-05

Preparation and photocatalytic activity of ZnxCd1?xS/TiO2 heterostructures composite fibers

ZHANG Lei1,YANG Guorui2,CHANG Wei1,2,YAN Wei2,3   

  1. 1 College of Environmental and Chemical Engineering,Xi’an Polytechnic University,Xi’an 710048,Shaanxi,China;2School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China;3Zhejiang Wenzhou Research Institute of Light Industry,Wenzhou 325003,Zhejiang,China
  • Online:2013-04-05 Published:2013-04-05

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

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

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