Eu/FeVO_4新型光催化剂的制备及其光催化性能  

Synthesis and Photocatalytic Property of Eu/FeVO_4 Novel Photocatalyst

作　　者：王敏[1,2] 王里奥[2] 张东[1] 李艳[1] 张文杰[1] 

机构地区：[1]沈阳理工大学环境与化学工程学院,辽宁沈阳110168 [2]重庆大学资源及环境科学学院,重庆400044

出　　处：《中国稀土学报》2010年第1期27-32,共6页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(50774074);国家重点基础研究发展计划项目(973计划)(2005CB121104)资助

摘　　要：以偏钒酸铵（NH4VO3）、硝酸铁（Fe（NO3）3·9H2O）、硝酸铕（Eu（NO3）3）为原料，采用浸渍法制备了Eu／FeVO4新型光催化剂，并利用XRD，SEM，BET，DRS和XPS等手段对其进行了表征。结果表明：Eu／FeVO4仍为三斜型晶体，其晶粒粒径大小未有显著变化；SEM显示掺杂后晶体表面附着较多细小颗粒，其比表面积得到了提高；并且其光吸收性能在200～500nm之间增强。在12w节能灯照射下，以甲基橙的光催化剂降解为模型反应，研究了该新型光催化剂的光催化活性。结果发现，与纯FeVO4样品相比，Eu／FeVO4样品光催化活性大幅提高，且当掺杂量为0．5％（质量分数）时，对甲基橙溶液的脱色率比纯FeVO4提高24％左右。The Eu/FeVO4 novel photocatalysts were prepared by impregnation method using NH4VO3, Fe （NO3）3 ·9H2O and Eu（NO3）3 as starting materials. The obtained samples were characterized by XRD, SEM, BET, DRS and XPS. The XRD patterns indicated that the Eu/FeVO4 photocatalysts consisted of triclinic phase without significant changes of crystalline size. The SEM images showed that after being Euloaded, many fine particles were observed on the surface of the FeVO4 particles, which maybe greatly increased their specific surface area. The DRS measurements showed that the absorption of Eu/FeVO4 novel photocatalyst was greatly increased during 200 - 500 nm. The photocatalytic activities of Eu/FeVO4 were evaluated by degradation of methyl orange under 20 W energy-saving lamp irradiation. The photocatalyty activity of Eu/FeVO4 sample was significantly enhanced and the decolorization rate of MO could be 24% more than that of pure FeVO4 sample when loading content was 0.5%.

关 键 词：钒酸铁 光催化 负载 甲基橙 稀土 

分 类 号：O643[理学—物理化学]