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采用三层同轴静电纺丝技术,以钛酸丁酯、正硅酸乙酯、聚乙烯吡咯烷酮、无水乙醇、芝麻油、山梨糖醇酐油酸酯和氯仿为原料,成功制备出TiO2@SiO2同轴双壁亚微米管.用差热–热重分析、X射线衍射、红外光谱仪、扫描电镜、透射电镜和能谱仪对样品进行了表征.结果表明,得到的产物为TiO2@SiO2同轴双壁亚微米管,以非晶态SiO2为外壳,晶态金红石型TiO2为内壁,同轴双壁亚微米管平均直径约680 nm,管壁厚约70 nm、内壁厚约40 nm、外壳厚约30 nm,长度大于20μm,对其形成机理进行了分析.同轴双壁亚微米管对罗丹明B显示了较好的光催化活性.
A three-layer coaxial electrospinning technique was used to prepare TiO2 @ SiO2 successfully with butyl titanate, tetraethylorthosilicate, polyvinylpyrrolidone, absolute ethanol, sesame oil, sorbitan oleate and chloroform as raw materials Coaxial double-walled submicron tube.The samples were characterized by DTA-TG, X-ray diffraction, infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and energy dispersive spectroscopy.The results show that the obtained product is TiO2 @ SiO2 coaxial Double wall submicron tube with amorphous SiO2 as the outer shell and crystalline rutile TiO2 as the inner wall. The average diameter of the coaxial double wall submicron tube is about 680 nm, the wall thickness is about 70 nm, the inner wall thickness is about 40 nm, and the thickness of the outer shell About 30 nm and a length greater than 20 μm, the formation mechanism was analyzed.The coaxial double-walled submicron tubes showed good photocatalytic activity toward rhodamine B.