Fe^(3+)掺杂纳米TiO_2的制备与表征  

Preparation and Characterization of Fe^(3+)-doped Nano-TiO_2

作　　者：杨荣国[1] 周亮 

机构地区：[1]内江职业技术学院生物技术系,内江641100 [2]杭州诺泰制药技术有限公司,杭州310052

出　　处：《材料导报（纳米与新材料专辑）》2014年第1期56-59,63,共5页

摘　　要：以TiCl4为前驱体,以FeCl3为Fe3+源在纳米TiO2的制备过程中掺入不同比例的Fe3+,获得了掺铁量不同的一系列纳米TiO2样品。采用XRD、XRF、HR-TEM、STEM EDS-Mapping等方法对样品的物相、形貌和微结构等进行系统分析与表征。结果表明,在水解沉淀法制备锐钛矿型纳米TiO2的过程中可将Fe3+掺入到其晶格中;随着掺铁量的增加,TiO2晶体的晶格畸变显著增大,TiO2晶体的缺陷逐渐由点缺陷、线缺陷向面缺陷发展;随着掺铁量的增加,样品对紫外-可见光的吸收边带值先增大后减小,且在铁含量约为0.01%时吸收边带值达到最大。Fe3＋-doped TiO2 was synthesized by a hydrolysis approach, using TICl4 as precursor and FeCla as Fe3＋ source. The samples were characterized by XRD, XRF, HR-TEM, STEM EDX-Mapping. The results indicate that Fea＋ is doped into the lattice of anatase TiO2 during the process of the anatase preparation by a hydrolysis approach. The lattice distortion of the anatase increases along with the doped dose of iron, and the defect type of anatase crystal changes gradually from point defect and line defect to plan defect as the doped dose of iron. The value of the absorption band edge of the samples increase initially, and then decreases along with the doped dose of iron. The value of the absorption band edge reaches its maximum when the doped dose of iron is 0.01%.

关 键 词：TIO2 Fe3+掺杂 缺陷 晶格畸变 吸收边带 

分 类 号：O643.3[理学—物理化学]