Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (15): 1660-1666.DOI: 10.6023/A1202143 Previous Articles    

Full Papers


徐淑芝, 董相廷, 盖广清, 王进贤, 刘桂霞, 鲁统晓   

  1. 长春理工大学化学与环境工程学院 长春 130022
  • 投稿日期:2012-02-14 发布日期:2012-05-22
  • 通讯作者: 董相廷
  • 基金资助:

    项目受国家自然科学基金(Nos. 50972020, 51072026)、教育部博士点基金(Nos. 20102216110002, 20112216120003)、吉林省科技发展计划项目(No. 20070402, 20060504)和教育部科学技术研究重点项目(No. 207026)资助.

Preparation of TiO2@SiO2 Coaxial Double-walled Submicrotubes by Trifluidic Coaxial Electrospinning and Its Photocatalytic Property

Xu Shuzhi, Dong Xiangting, Gai Guangqing, Wang Jinxian, Liu Guixia, Lu Tongxiao   

  1. School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China
  • Received:2012-02-14 Published:2012-05-22
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos. 50972020, 51072026), Ph.D. Programs Foundation of the Ministry of Education of China (Nos. 20102216110002, 20112216120003), the Science and Technology Development Planning Project of Jilin Province (Grant Nos. 20070402, 20060504), Key Research Project of Science and Technology of Ministry of Education of China (Grant No. 207026).

Coaxial double-walled submicrotubes have potential extensive applications in many fields owing to their peculiar submicrostructures. The electrospinning has become a major method for preparation of one-dimensional nano- or micromaterials. In order to invent a facile technique to fabricate coaxial double-walled submicrotubes, a modified electrospinning was employed. TiO2@SiO2 coaxial double-walled submicrotubes were successfully synthesized by trifluidic coaxial electrospinning technique using tetrabutyl titanate, tetraethyl orthosilicate, polyvinyl pyrrolidone, absolute ethanol, sesame oil, span-80 and chloroform as starting materials. The samples were characterized by thermogravimetry and differential thermal analysis, X-ray diffractometry, Fourier transform infrared spectrometry, scanning electron microscopy, transmission electron microscopy and energy dispersive spectrometry. The results indicated that the products are TiO2@SiO2 coaxial double-walled submicrotubes with an amorphous SiO2 outer shell, a crystalline rutile-typed TiO2 inwall. The submicrotubes possess an average diameter of ca. 680 nm, wall thickness of the tubes of ca. 70 nm, inwall of ca. 40 nm and outer shell of ca. 30 nm. The length of submicrotubes is greater than 20 μm. The formation mechanism of TiO2@SiO2 coaxial double-walled submicrotubes is preliminarily investigated. TiO2@SiO2 coaxial double-walled submicrotubes present better photocatalytic activity on rhodamine B. The simple preparation method is also appropriate for fabricating other coaxial multi-walled nano- or submicrotubes of inorganics.

Key words: trifluidic coaxial electrospinning, coaxial double-walled submicrotubes, silicon dioxide, titanium dioxide, photocatalysis