WO_3/TiO_2复合纤维的制备及储能光催化性能  

Preparation and Energy Stored Photocatalytic Properties of WO_3/TiO_2 Composite Fibers

作　　者：李跃军[1,2] 曹铁平[2] 邵长路[1] 王长华[1] 

机构地区：[1]东北师范大学先进光电子功能材料研究中心,长春130024 [2]白城师范学院化学系,白城137000

出　　处：《高等学校化学学报》2012年第7期1552-1558,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:50972027);教育部新世纪优秀人才支持计划(批准号:NCET-05-0322);吉林省科技发展计划(批准号:201205034)资助

摘　　要：以钛酸正丁酯为前驱体,采用静电纺丝技术制得了纯锐钛矿TiO2纤维,并以其为基质,通过水热法制备了具有异质结构的WO3/TiO2复合纤维.利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能量色散光谱仪(EDS)、透射电子显微镜(TEM)和高分辨透射电子显微镜(HRTEM)等对样品的结构和形貌进行了表征.以罗丹明B的脱色降解为模型反应,考察了样品的光催化性能和储能光催化性能.结果表明,花状WO3微球包裹在TiO2纤维上,得到了具有异质结构的WO3/TiO2复合纤维光催化剂.WO3与TiO2复合有利于光生载流子的输运和分离,增强了体系的量子效率,提高了光催化活性.WO3/TiO2复合纤维经光照处理后,在黑暗条件下显示出储能光催化特性.Heterostructured WO3/TiO2 composite fibers were prepared via electrospinning fabrication of anatase fibers by adopting n-butyl titanate[Ti（OBu）4] as precursors and hydrothermal growth of WO3 nanostructures on anatase fibers substrate.The morphology and structure of WO3/TiO2 composite fibers were characte-rized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,energy dispersive X-ray spectroscopy（EDS）,transmission electron microscopy（TEM） and high resolution transmission electron microscopy（HRTEM） techniques.The results showed that flower-like WO3 microsphere could evenly grow on the TiO2 fibers surface and thus heterostructured WO3/TiO2 composite fibers were successfully obtained.By employing Rhodamine B degradation as the model reaction,the WO3/TiO2 heterostructures showed enhanced photocatalytic efficiency compared with the bare TiO2 fibers under UV light irradiation.The enhanced photocatalytic efficiency could be ascribed to the promoted electron-hole pairs separation induced by the heterojunction and thus enhanced quantum efficiency.Degradation experiment displays that Rhodamine B can be degraded in darkness by the WO3/TiO2 composite fibers photocatalyst with energy storage degradation activity.

关 键 词：静电纺丝技术 水热法 WO3/TiO2复合纤维 储能 光催化降解 

分 类 号：O643[理学—物理化学]