过渡金属Cr掺杂对金红石光性影响的研究

摘要

The visible-light absorption of rutile was raised through doping Cr ion into the surface of rutile crystal with high-temperature-diffusion-doping-sensitization technique. TiO2:Cr specimen was analyzed by means of UV-VIS,XFA,XRD,XPS and LRS,respectively. As a result,it is shown that after Cr ion is doped into the surface of the crystal,Cr ion exists in the solid-melting-state Cr2TiO5,which induces the original absorption edge(410nm) move to 750nm,and achieves match with solar spectrum and raises optical absorption to visible-light effectively.%报道了采用高温扩散掺杂敏化法在金红石晶体表面掺入Cr离子、有效提高可见光响应的研究结果.分别利用UV-VIS、XFA、XRD和LRS等测试手段对样品进行了分析.结果表明Cr离子掺入晶体表面后以Cr2O3的形式与基体TiO2形成固溶体Cr2TiO5，提高了可见波段的光吸收，使原来位于410nm的TiO2的吸收边移到了750nm处，实现了与太阳光谱的匹配.