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以正硅酸乙酯(TEOS)和钛酸四丁酯(Ti(OC4H9)4)为原料,采用静电纺丝技术制备了SiO2/TiO2共混纤维膜,经过煅烧后得到了SiO2/TiO2无机纳米纤维.采用TG-DTA对SiO2/TiO2共混无机纤维的热行为进行了表征,并对不同电压、不同纺丝液配比以及不同煅烧温度条件下得到的样品进行了SEM表征,研究不同条件对纤维形貌和光催化性能的影响.结果表明:当纺丝电压+17 kV、接收距离13.5 cm时,纺丝液最佳配比是4.0 g PVP、11 mL EtOH、1.0 mL HAc、1.3 mL TEOS和1.0 mL Ti(OC4H9)4.为了得到形貌和组成兼备的SiO2/TiO2共混无机纤维,确定最佳热处理条件是450℃保温3 h,样品在紫外光照射下对亚甲基蓝的最高去除率达到51%.
SiO 2 / TiO 2 blend nanofibers were prepared by electrospinning using TEOS and Ti (OC 4 H 9) 4 as raw materials. The thermal behavior of SiO2 / TiO2 blend inorganic fibers was characterized by TG-DTA. The SEM images of the samples obtained under different voltage, different spinning solution ratio and different calcination temperature were used to investigate the effects of different conditions Fiber morphology and photocatalytic performance of the spinning solution were investigated.The results showed that the optimum spinning ratio was 4.0 g PVP, 11 mL EtOH, 1.0 mL HAc, 1.3 mL TEOS and 13 mL TEOS when the spinning voltage was +17 kV and the receiving distance was 13.5 cm 1.0 mL Ti (OC4H9) 4. In order to get SiO2 / TiO2 blend inorganic fibers with morphology and composition, the optimum heat treatment conditions were as follows: heat preservation at 450 ℃ for 3 h, the highest removal rate of methylene blue to UV light of 51 %.