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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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
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
Electrospinning technique
Hydrothermal method
WO3/TiO2composite fibers
Energy storage
Photocatalytic degradation
