水热法合成LaPO_4/TiO_2异质结复合光催化材料及性能研究  

Hydrothermal Synthesis and Photocatalytic Properties of Heterostructures LaPO_4/TiO_2 Composite Photocatalyst

作　　者：李跃军[1] 曹铁平[1] 梅泽民[1] 王霞 席啸天 

机构地区：[1]白城师范学院纳米光催化材料研究中心,吉林白城137000

出　　处：《中国稀土学报》2017年第6期709-716,共8页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(21573003);吉林省自然科学基金项目(20140101118JC);吉林省教育厅"十二五"科学技术研究项目(2015413)资助

摘　　要：以静电纺丝技术制备的锐钛矿相TiO_2纳米纤维为基质,尿素为碱源,环己烷六羧酸为小分子模板剂,采用水热法合成了LaPO_4/TiO_2异质结复合纳米纤维。利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、高倍透射电子显微镜(HRTEM)和X射线衍射(XRD)等分析测试手段对产物形貌和结构进行了表征,并以甲基橙为模拟污染物,紫外光为光源,评价了样品光催化降解活性。结果表明:LaPO_4纳米棒均匀地构筑在TiO_2纳米纤维表面,制备了LaPO_4/TiO_2异质结复合纳米纤维光催化材料,其具有比纯TiO_2纳米纤维和Degussa P-25更强的光催化活性,降解率达到89.4%。Abstract： Heterostructured LaPO4/TiO2 composite photocatalyst material were synthesized via hydrothermal method with electrospinning fabrication of anatase TiO2 nanofibers as substrate, urea （CO（ NH2 ）2 ） as alkaline source, and Cyclohexane six carboxylic acid （H6L） as low molecular template. The morphology and structure of LaPO4/TiO2 composite nanofibers were characterized by scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, high-resolution transmission electron microscopy （HRTEM） and X-ray diffraction （XRD） analysis. The photocatalytic activity of the prepared samples was evaluated by photocatalytic degradation of methyl orange （MO） under UV light irradiation. The results showed that LaPO4 nanorod could evenly grow on the TiO2 nanofibers surface and thus heterostructured LaPO4/TiO2 composite materials were successfully obtained. By employing methyl orange （MO） degradation as the model reaction, the LaPO4/TiO2 heterostructures showed enhanced photocatalytic efficiency compared with the bare TiO2 nanofibers and Degussa of degradation rate. The high photocatalytic performance of attributed to the strong UV light absorption. P-25 under UV light irradiation, owing to the 89.4% the heterostructures composite photocatalysts could be

关 键 词：LAPO4 TiO2复合光催化剂 异质结 水热法 光催化 

分 类 号：O643[理学—物理化学]