摘要：利用 Zn²⁺离子掺杂纳米二氧化钛，以提高其光电转化性能, 通过 溶胶-凝胶法制备了 Zn²⁺离子掺杂的纳米二氧化钛粉体，采用 X 射线衍 射、扫描电镜、紫外可见光谱和光诱导产生光电流法对掺杂二氧化钛的 物相、形貌、光吸收性能和光电性能进行了表征。 研究发现， Zn²⁺掺杂有 利于锐钛矿的结晶， 掺杂二氧化钛较纯二氧化钛的紫外吸收边红移了 约 10 nm，当 Zn²⁺掺杂量为 Ti 物质的量的 1%时光电转化性能最佳。 

关键词：纳米二氧化钛；掺杂；光电性能

Abstract：In oder to endence the photoelectronic performance of TiO₂，Zn²⁺doped TiO₂ nano-sized powder was synthesized by sol-gel method. The characterizations of the synthesized samples were performed by X-ray diffraction（XRD），scanning electron microscopy（SEM）， ultraviolet visi ble spectroscopy（UV-vis）and UV-light induced photoelectric-current. The results showed that the samples calcined at 400 ℃ were all anatase and the doping was propitious to crystallizing of TiO₂ by XRD and SEM. The TiO₂samples exhibited enhanced absorption at the ultraviolet range and the ab sorption-edge of doped samples red shifted 10 nm in the UV-vis spectra doping were found to significantly enhance the photoelectronic perfor mance of TiO₂ and the best doping rate was n（Ti⁴⁺）∶n（Zn²⁺）=100∶1. 

Keywords：TiO₂ nano-sized powder；doping；optoelectronic property