气相火焰燃烧合成铁掺杂二氧化钛纳米晶及其结构性质研究

Synthesis and Characteristics of Fe^(3+)-doped TiO_2 Nanocrystals by Vapour Diffusion Flame Method

采用气相扩散火焰燃烧制备了铁掺杂二氧化钛纳米晶,并利用XRD、EPR、ICP-AES和XPS等测试手段对该催化剂晶相组成、晶粒尺寸及表面性质进行了分析。研究表明,铁掺杂改性对制备TiO2的晶相组成及晶粒尺寸都会产生影响。随着掺入量的增加,掺杂相Fe3+逐渐向TiO2体相富集,并促进了TiO2表面氧空位的生成。

The Fe^3＋-doped TiO2 nanocrystals were prepared by the vapour diffusion flame method. The crystal phase, particle size and surface characteristics of the as-prepared TiO2 catalyst samples were characterized by XRD, EPR, ICP-AES and XPS. It is found that the Fe3^＋-doped modification can influence the crystal phase and particle size of the as-prepared TiO2. With increasing the Fe^3＋-doped content, high level of Fe-doping will exist in bulk TiO2 matrix and the surface oxygen vacancies will be enhanced.