高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (11): 2490.

• 研究论文 • 上一篇    下一篇

原位水热合成SrTiO3/TiO2复合纳米纤维及光催化性能

李跃军, 曹铁平, 王长华, 邵长路   

  1. 1. 东北师范大学先进光电子功能材料研究中心, 长春 130024;
    2. 白城师范学院化学系, 白城 137000
  • 收稿日期:2011-02-25 修回日期:2011-05-13 出版日期:2011-11-10 发布日期:2011-10-14
  • 通讯作者: 邵长路 E-mail:clshao@nenu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 50572014, 50972027)和教育部新世纪优秀人才支持计划(批准号: NCET-05-0322)资助.

Hydrothermal In-situ Synthesis and Enhanced Photocatalytic Properties of SrTiO3/TiO2 Composite Nanofibers

LI Yue-Jun1,2, CAO Tie-Ping1,2, WANG Chang-Hua1, SHAO Chang-Lu1*   

  1. 1. Centre for Advanced Optoelectronic Functional Material Research, Northeast Normal University, Changchun 130024, China; 
    2. Department of Chemistry, Baicheng Normal University, Baicheng  137000, China
  • Received:2011-02-25 Revised:2011-05-13 Online:2011-11-10 Published:2011-10-14
  • Contact: SHAO Chang-Lu E-mail:clshao@nenu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 50572014, 50972027)和教育部新世纪优秀人才支持计划(批准号: NCET-05-0322)资助.

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被引次数

48

摘要： 以利用静电纺丝技术制备的TiO2纳米纤维为模板和反应物, 原位水热合成了具有异质结构的SrTiO3/TiO2复合纳米纤维. 采用X射线衍射(XRD)、扫描电子显微镜(SEM)、能量散射光谱(EDS)、高分辨透射电子显微镜(HRTEM)和X射线光电子能谱(XPS)等测试手段对样品的结构和形貌进行了表征. 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, SrTiO3纳米立方体均匀地生长在TiO2纳米纤维表面, 得到了异质结构复合光催化剂, 其与纯TiO2纳米纤维相比光催化活性明显提高, 且易于分离、回收和再利用, 循环使用5次, RB的降解率仍保持在97%以上. 初步探讨了SrTiO3/TiO2异质结的生长机制和光催化活性提高机理.

关键词: 静电纺丝, 原位水热合成, SrTiO3/TiO2, 光催化降解

Abstract: Heterostructured SrTiO3/TiO2 composite  nanofibers were fabricated by in situ hydrothermal method using TiO2 nanofibers as both template and reactant. The morphology and structure of SrTiO3/TiO2 composite nanofibers were characterized via X-ray diffraction(XRD), field emission scanning electron microscopy(FESEM), energy-dispersive spectrometry(EDS), high-resolution transmission electron microscopy(HRTEM) and X-ray photoelectron spectroscopy(XPS).The as-fabricated heterostructured composite included SrTiO3 nanocubes assembled uniformly on the surface of TiO2 nanofibers. Compared with the pure TiO2 nanofibers, SrTiO3/TiO2 nanofibers exhibited enhanced photocatalytic activity in the decomposition of Rhodamine B(RB) under ultraviolet light. This material also showed good catalytic stability and the decolorizing efficiency of RB solution remained above 97% after 5 times recycle, and was easily separated, removed from the system after reaction and reuse. Finally, the growth mechanism of SrTiO3/TiO2 heterojunction and  the mechanism for the enhancement of photocatalytic activity of heterostructured nanofibers were discussed.

Key words: Electrospinning, In-situ hydrothermal synthesis, SrTiO3/TiO2, Photocatalytic degradation

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