SiO_2/TiO_2共混电纺纤维的制备及光催化性能研究  

Synthesis and Photocatalytic Performance Study of SiO_2/TiO_2 Nanofiber via Electrospinning

作　　者：王娇娜[1,2] 李从举[1,2] 

机构地区：[1]北京服装学院材料科学与工程学院,北京100029 [2]服装材料研究开发与评价北京市重点实验室,北京100029

出　　处：《北京服装学院学报（自然科学版）》2014年第1期16-23,共8页Journal of Beijing Institute of Fashion Technology：Natural Science Edition

基　　金：国家自然科学基金项目(grant no.51073005;21274006);北京市自然科学基金项目(grant no.2112013);北京市属高等学校人才强教深化计划(IHLB);国家973项目(grant no.2010CB933501);纺织之光青年基金;北京服装学院科学研究项目一般科研项目(编号:2012A-09)

摘　　要：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%.Using tetraethoxysilane （TEOS） and tetrabutyl titanate （ Ti （ OC4 H9 ） 4 ） materials, SiO2/ TiO2 nanofiber membrane were prepared via electrospinning technology. After calcinations, SiO2/ TiO2 inorganic nanofibers were obtained. The thermal behavior was characterized by thermal analysis （TG-DTA）. In order to study the fiber morphology and photocatalytic performance under different conditions, such as voltage, the ratio of spinning dope and calcination temperature, the samples were also characterized by Scanning Electron Microscopes （SEM）. The results showed that, the best conditions of electrospinning were as follows, the voltage was ＋ 17 kV, receive distance was 13.5 cm, and the optimum proportion was 4.0 g PVP, 11 mL EtOH, 1.0 mL HAc, 1.3 mL TEOS and 1.0 mL Ti（ OC4H9）4. SiO2/TiO2 inorganic nanofibers with better morphology and composition were prepared by calcining for 3 h under 450 ℃. The highest removal rate of the sample of methylene blue（MB） was up to 51% under UV irradiation.

关 键 词：电纺丝 纳米纤维 二氧化钛 二氧化硅 

分 类 号：O631.1[理学—高分子化学]