Fe~(3+)掺杂的TiO_2纳米复合粒子的合成及表征

利用酸催化的溶胶-凝胶法合成了一系列不同Fe~(3+)掺杂量的TiO_2纳米复合 料子。用XRD，TEM，UV-vis等技术进行了表征。结果表明：在所研究的掺杂量范围 内(x_B = 0.0005 ～0.1000),未发现有铁氧化物的晶相生成；Fe~(3+)的掺杂可以 实现TiO_2由锐钛矿(anatase)结构向金红石(rutile)结构的低温转化，随着Fe~ (3+)掺杂量的增大，对光的吸收发生红移，吸收强度增大。掺杂适量的Fe~(3+)可 以使TiO_2纳米微粒的光催化活性得以提高。

Synthesis and Characterization of Fe~(3+)-doped TiO_2 Nanoparticles

TiO 2 nanoparticles, with different amounts of Fe 3+ doped, were synthesized using an acid catalyzed sol gel method and characterized by XRD, TEM, and UV vis techniques. The results show that the absorption of Fe 3+ /TiO 2 nanoparticles were largely red shifted and the absorption intensities increased with increasing amounts of Fe 3+ . The transition temperature of TiO 2 from anatase to rutile was lowered and the crystal phase of ferric oxide was not observed and the activities of TiO 2 nanophotocatalysts were enhanced due to the addition of Fe 3+ into TiO 2.