School of Chemical Engineering and Technology, Harbin Institute of Technology, No. 92 Xidazhijie Street, Nangang, Harbin 150001, PR China.
ACS Appl Mater Interfaces. 2010 Sep;2(9):2617-22. doi: 10.1021/am100450h.
Ni-doped TiO2 film catalysts were prepared by a plasma electrolytic oxidation (PEO) method and were mainly characterized by means of SEM, EDS, XRD, XPS, and DRS, respectively. The effects of Ni doping on the structure, composition and optical absorption property of the film catalysts were investigated along with their inherent relationships. The results show that the film catalyst is composed of anatase and rutile TiO2 with microporous structure. Doping Ni changes the phase composition and the lattice parameters (interplanar crystal spacing and cell volume) of the films. The optical absorption range of TiO2 film gradually expands and shifts to the red with increasing dosages. Both direct and indirect transition band gaps of the TiO2 films are deduced consequently. Moreover, the photocatalytic activity of the film catalysts for splitting Na2S+Na2SO3 solution into H2 is enhanced by doping with an appropriate amount of Ni. The as-prepared TiO2 film catalyst doping with 10 g/L of Ni(Ac)2 presents the highest photocatalytic reducing activity.
采用等离子体电解氧化（PEO）法制备了掺镍 TiO2 薄膜催化剂，分别采用 SEM、EDS、XRD、XPS 和 DRS 对薄膜催化剂的结构、组成和光学吸收性能进行了表征，并探讨了它们之间的内在关系。结果表明，薄膜催化剂由锐钛矿和金红石 TiO2 组成，具有微孔结构。掺杂 Ni 会改变薄膜的相组成和晶格参数（晶面间距和晶胞体积）。TiO2 薄膜的光吸收范围逐渐扩大，并随着剂量的增加向红移移动。由此推断 TiO2 薄膜的直接和间接跃迁带隙。此外，掺杂适量 Ni 可以提高薄膜催化剂对 Na2S+Na2SO3 溶液分解为 H2 的光催化活性。制备的 TiO2 薄膜催化剂中，当 Ni(Ac)2 的掺杂量为 10 g/L 时，表现出最高的光催化还原活性。
