摘要
通过溶胶-凝胶和静电纺丝技术相结合的方法,成功制备不同复合浓度聚乙烯吡咯烷酮(PVP)/钛酸四正丁酯(Ti(OC4H9)4)/钨酸铵(N5H37W6O24·H2O)前驱体。通过控温煅烧获得不同煅烧温度、不同复合浓度的TiO2/WO3微纳米纤维复合材料。采用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、场发射扫描电子显微镜(FE-SEM)和紫外-可见漫反射光谱(UV-Vis)技术对样品进行表征。以亚甲基蓝(MB)的光降解为模型反应,研究TiO2/WO3微纳米纤维复合材料在紫外光照射下的光催化活性。结果表明,煅烧温度500℃时,n(Ti):n(W)=12:1形成WO3掺杂的TiO2微纳米纤维及n(Ti):n(W)=4:1形成的TiO2/WO3复合微纳米纤维的光催化活性均高于纯TiO2。
PVP/Ti（OC4H9）4/N5H37W6O24·H2O precursors with different Ti/W molar ratios were successfully syn-thesized by a simple combination method of Sol-Gel and electrospinning techniques. The electrospun precursors was converted into TiO2/WO3 micro-nanofibers via calcination at different temperatures in air. The obtained sam-ples were characterized by X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FT-IR）, scanning electron microscopy （FE-SEM） and ultraviolet-visible diffuse reflectance spectroscopy （UV-Vis） techniques. Photocatalytic activity was evaluated by degradation of methylene blue （MB） under ultraviolet light irradiation. The results showed that WO3-doped TiO2 micro-nanofibers with Ti/W molar ratio of 12：1 and TiO2/WO3 micro-nanofi-bers with Ti/W molar ratio of 4：1 after calcination at 500℃exhibited better photocatalytic degradation activity than that of pure TiO2 micro-nanofibers.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第6期605-613,共9页
Journal of Inorganic Materials
基金
国家自然科学基金(20871023)
吉林省科技发展计划(20101549
20130102001JC)
吉林省教育厅项目(2013130
2013146)~~
