CeO_2纳米棒的微波合成及其光催化性能  

Microwave Homogeneous Synthesis and Photocatalytic Property of CeO_2 Nanorods

作　　者：齐恩磊[1] 满丽莹[1] 王孙昊[1] 王介强[1] 

机构地区：[1]济南大学材料科学与工程学院,济南250022

出　　处：《材料研究学报》2011年第2期219-224,共6页Chinese Journal of Materials Research

基　　金：山东省优秀中青年科学家奖励基金BS2009CL029;山东省重点学科基金XTD0703资助项目~~

摘　　要：采用微波均相法制备具有光催化活性的CeO_2纳米棒,用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、比表面积与孔径分布测试(BET-BJH)以及紫外-可见吸收光谱测试(UV-vis)等手段对其进行表征,研究了尿素浓度对晶粒尺寸、形貌和光催化性能的影响,结果表明,当尿素浓度达到6.0mol/L时产物的棒状结构明显,由粒径为20-40nm的晶粒组成的球链状结构聚集而成,且催化性能较好。以甲基橙为脱色模型进行降解反应,当氧化铈纳米棒加入量为2.0g/L时,可见光照1h后甲基橙降解率达到了95.4%,明显高于二氧化钛P25的降解率。Nanorod-CeO2 photocatalyst was synthesized by the microwave homogeneous precipitation method and was characterized by SEM,TEM,XRD,BET-BJH,and UV-vis spectrum.The effects of urea concentration on the grain size,morphology and Photocatalytic property were investigated.The results show that when the CO（NH2）2 concentration is 6.0 mol/L,the obvious club-shaped structure consisted of chains which are formed by grains whose size is 20-40 nm.The photocatalytic activity of CeO2 nanorods was evaluated by degradation of methyl orange.The degradation rate of methyl orange reaches 95.4%under the reaction conditions of the catalyst amount of 2.0 g/L,the sunshine,and the reaction time of 1 h.

关 键 词：无机非金属材料 纳米材料 CeO2纳米棒 微波均相 光催化 

分 类 号：TB321[一般工业技术—材料科学与工程] TB383