γ-Bi2O3/TiO2复合纤维的制备及光催化性能  

Preparation and Photocatalytic Properties of γ-Bi_2O_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：《无机材料学报》2012年第7期687-692,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(50572014,50972027);教育部新世纪优秀人才支持计划(NCET-05-0322);吉林省科技发展计划(201205034)~~

摘　　要：采用静电纺丝技术与溶剂热法相结合制备了γ-Bi2O3/TiO2复合纤维光催化材料.利用X射线衍射(XRD)、扫描电镜(SEM)、电子能谱(EDS)、透射电镜(TEM)、高分辨透射电镜(HRTEM)和紫外–可见吸收光谱(UV-Vis)等分析测试手段对材料进行了表征,并以罗丹明B(RB)的脱色降解为模式反应,考察了材料的可见光催化性能.结果表明:γ-Bi2O3纳米片均匀地生长在TiO2纤维上,形成了具有异质结构的γ-Bi2O3/TiO2复合纤维光催化材料,其光谱响应范围拓宽至可见光区,有利于TiO2光生电子和空穴的分离,增强了体系的量子效率.与纯TiO2纤维相比可见光催化活性明显提高,对RB的脱色率达87.8%.Heterostructured γ-Bi2O3/TiO2 composite fibers were prepared via combination of solvothermal method and electrospinning technique.X-ray diffraction（XRD）,scanning electron microscope（SEM）,energy dispersive spectroscope（EDS）,transmission electron microscope（TEM）,high-resolution transmission electron microscope（HRTEM） and UV-Vis absorption spectra were used to characterize heterostructured γ-Bi2O3/TiO2 composite fibers.The photocatalytic properties of the heterostructured samples were evaluated by degrading rhodamine B（RB） under visible light irradiation.The results showed that γ-Bi2O3 nanosheets could evenly grow on the TiO2 fibers surface and thus heterostructured γ-Bi2O3/TiO2 composite fibers were successfully obtained.The absorption range of the as-obtained heterostructured samples were extended to the visible light region.Moreover,the presence of γ-Bi2O3 nanostructures/TiO2 fibers heterostructures was beneficial to separation of photo-generated electrons and holes which enhanced the system’s quantum efficiency.In comparison with that of pure TiO2nanofibers,the γ-Bi2O3/TiO2 heterostructures have enhanced photocatalytic efficiency under visible light irradiation,and the decolorizing efficiency of RB solution can reach 87.8%.

关 键 词：静电纺丝 溶剂热法 γ-Bi2O3/TiO2复合纤维 光催化 

分 类 号：O643[理学—物理化学]