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．
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.
参考文献
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