中文摘要：

采用酸催化溶胶-凝胶法和光化学沉积法相结合制备出了掺Fe^3＋附Ag纳米TiO2复合粒子，用TEM、XRD、XPS、UV—vis等技术进行了表征。结果表明：纳米粒子粒径约为10～15nm；Fe^3＋的掺杂能促进TiO2由锐钛矿相向金红石相的转变；改性后的TiO2对光的吸收发生红移，吸收强度明显增大；XPS分析表明附载在TiO2表面的银以Ag^0形式存在。以紫外光为光源，甲基橙为目标降解物，评价了催化剂的光催化活性，实验表明，掺Fe^3＋附Ag的TiO2比纯TiO2及仅掺Fe^3＋或仅附Ag的TiO2能显示出更高的光催化活性；且掺Fe^3＋0.4％、附银1％（摩尔分数）的催化剂的光催化活性最高。

英文摘要：

Fe^3＋-doped and Ag-loaded TiO2 nanoparticles were synthesized using acid-catalyzed sol-gel and photodeposition methods. The nanoparticles were characterized by TEM, XRD,XPS and UV-vis techniques. The results showed that the average diameter of nanoparticles was 10~ 15nm. Fe^3＋ doping could promote the phase transformation of TiO2 from anatase to rutile. The absorption of TiO2 nanoparticles with Fe^3＋ doped and Ag loaded to light was red-shifted and the absorption intensities increased evidently. The oxidation state of the silver loaded on the TiO2 was AgO from X-ray photoelectron spectroscopy（XPS）. UV light was used as light source to investigate the photocatalytic activity of the catalyst for the degradation of methyl orange. The results showed that Fe^3＋-doped and Ag-loaded TiO2 exhibited higher photocatalytic activity compared with pure TiO2, Fe^3＋- doped TiO2 as well as Ag-loaded TiO2 ,and the optimal amount of doped Fe^3＋ and loaded Ag was 0.4% and 1% （mole fraction）, respectively.