Liu Yue, Wang Hai-qiang, Wu Zhong-biao
Department of Environmental Engineering, Zhejiang University, Hangzhou 310027, China.
J Environ Sci (China). 2007;19(12):1505-9. doi: 10.1016/s1001-0742(07)60245-9.
A series of nanosized ion-doped TiO2 catalysts with different ion content (between 0.1 at .% and 1.0 at .%) have been prepared by wet impregnation method and investigated with respect to their behavior for UV photocatalytic oxidation of nitric oxide. The catalytic activity was correlated with structural, electronic and surface examinations of the catalysts using X-ray diffraction analysis (XRD), ultraviolet-visible (UV-Vis) absorption spectroscopy, transmission electron microscopy (TEM), energy disperse spectrometer (EDS) and high resolution-transmission electron microscopy (HR-TEM) techniques. An enhancement of the photocatalytic activity was observed for Zn2+ doping catalyst ranged from 0.1 at .% to 1.0 at .% which was attributed to the lengthened lifetime of electrons and holes. The improvement in photocatalytic activity could be also observed with the low doping concentration of Cr3+ (0.1 at .%). However, the doping of Fe3+, Mo6+, Mn2+ and the high doping concentration of Cr3+ had no contribution to photocatalytic activity of nitric oxide.
通过湿浸渍法制备了一系列具有不同离子含量（0.1原子%至1.0原子%）的纳米级离子掺杂二氧化钛催化剂，并对其在紫外光催化氧化一氧化氮方面的行为进行了研究。利用X射线衍射分析（XRD）、紫外可见（UV-Vis）吸收光谱、透射电子显微镜（TEM）、能量色散光谱仪（EDS）和高分辨率透射电子显微镜（HR-TEM）技术，将催化活性与催化剂的结构、电子和表面检测相关联。观察到Zn2+掺杂催化剂（掺杂量范围为0.1原子%至1.0原子%）的光催化活性增强，这归因于电子和空穴寿命的延长。在低掺杂浓度的Cr3+（0.1原子%）下也可观察到光催化活性的提高。然而，Fe3+、Mo6+、Mn2+的掺杂以及高掺杂浓度的Cr3+对一氧化氮的光催化活性没有贡献。
