水热法制备α-Fe2O3纳米球及其光催化性质研究  

Hydrothermal preparation of α-Fe_2O_3 nano-scale spheres and their photocatalytic property study

作　　者：全桂英[1,2] 吴明在[1,3] 钱益武[1] 杜显振[1] 陆香花[1] 

机构地区：[1]安徽大学物理与材料科学学院,安徽省信息材料与器件重点实验室,安徽合肥230039 [2]淮南师范学院物理与电子信息系,安徽淮南232001 [3]中国科学院固体物理研究所材料物理重点实验室,安徽合肥230031

出　　处：《安徽大学学报（自然科学版）》2011年第1期37-41,共5页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50901074);安徽省自然科学基金资助项目(070414202);安徽省教育厅自然科学基金资助项目(2006KJ269B)

摘　　要：以硝酸铁、草酸为原料,采用水热反应法合成球形α-Fe2O3纳米颗粒.利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)对产物的物相和形貌进行表征,研究水热反应温度对物相形成和形貌影响的规律;同时以甲基橙溶液为目标降解物,以紫外灯为实验光源对产物进行了光降解性能测试.结果表明:水热反应温度的提高有利于α-Fe2O3晶体颗粒的晶化,并使其粒径分布均匀,形貌趋向于球形.在光催化性能测试中,随着光照时间的延长,纳米α-Fe2O3对甲基橙的降解率不断提高.Spherical α-Fe2O3 nanoparticles were prepared via hydrothermal method using Fe（NO3）3· 9H2O and C2H2O4·2H2O as the starting materials.The phase and morphology of the products were characterized by X-ray diffraction（XRD）,Scanning electron microscopy（SEM） and the effect of reaction temperatures on the phases and morphologies of the products were investigated.Meanwhile,the performances of photodegradation of the products were examined using ultraviolet lamp as light source,methyl orange as a contaminant.The measurements results indicated that the increase of the hydrothermal reaction temperature was favorable to the improvement of α-Fe2O3 crystalline,reduction of particle size distribution and helped to make the products morphology spherical.During the photocatalytical performance test,with the elongation of illumination,the degradation rate of α-Fe2O3 nanoparticles for methyl orange was increased.

关 键 词：Α-FE2O3 水热法 光催化性能 

分 类 号：O614.81[理学—无机化学] X703.1[理学—化学]