Preparation of Nano-hybrid Materials Composed of Light Elements and Application of Them for Hydrogen Generation and Storage

研究了在TiO_2中掺杂碳和氮，以提高TiO_2在可见光激发下的光催化等光电化学性能。在本研究中，我们尝试用TiCl_4与桦木、棉花等自然资源进行化学反应制备季钛/O/C/N材料，并对其光电性能进行了测试。在氮气气氛下，用TiCl_4与桦木木屑在770K下反应制备了Ti/O/C/N材料。x射线衍射和ESCA研究表明，产物表面白色膜为锐钛型TiO_2，体为非晶碳。采用循环伏安法和恒电位法测定了0.5M-H_2SO_4水溶液中的电化学性能。用滤光片切断紫外的氙灯照射可见光，增加了光电化学电流。氧化和还原电流的增加表明电子和空穴都可以进行光电化学反应。具有紫外光的卤素灯照射加速了光电化学反应。

Doping of carbon and nitrogen into TiO_2 has been investigated for the development of photo-electrochemical properties such as photocatalysis excited by visible light. In the present study, we have tried to prepare quaternary Ti/O/C/N materials by a chemical reaction of TiCl_4 with natural resources such as chop of birch or cotton, and measured their photo-electrochemical properties. The Ti/O/C/N material was prepared by the reaction of TiCl_4 with chop of birch at 770K under N_2 atmosphere.X-ray diffraction and ESCA studies indicated that white film on the product was anatase-type TiO_2 and bulk was noncrystalline carbon. Electrochemical properties were measured by cyclic voltammetry and potentiostatic method in 0.5M-H_2SO_4 aqueous solution. Photo-electrochemical current increased by the irradiation of visible light using Xe lamp whose UV light was cut by a filter. Increasing in both oxidation and reduction current suggested that both electrons and holes could make photo-electrochemical reaction. Irradiation by halogen lamp having UV light accelerated the photo-electrochemical reaction.