权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

The Design and Development of Novel Titanium Oxide Photocatalysts Prepared on the Various Plate Materials by an Advanced Ion Engineering Techniques

采用先进离子工程技术在各种板材上制备新型氧化钛光催化剂的设计与开发

基本信息

批准号：
10650816
负责人：
ANPO Masakazu
金额：
$ 2.05万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

The photocatalytic degradation of various toxic compounds in aqueous solution using fine TiOィイD22ィエD2 particles has been investigated by many researchers, however, to avoid the filtration and suspension of the small particle photocatalysts, the design of an effective transparent TiOィイD22ィエD2 thin film photocatalyst is strongly desired. In this research project, transparent TiOィイD22ィエD2 thin film photocatalysts were prepared on transparent porous Vycor glass (PVG) by the ionized cluster beam (ICB) method. UV-Vis and XAFS investigations revealed the formation of uniform thin anatase TiOィイD22ィエD2 films with good crystallinity, even in the case of a film thickness of less than 300 nm. These thin TiOィイD22ィエD2 films were found to efficiently decompose NO into NィイD22ィエD2 and OィイD22ィエD2 photocatalytically under UV light irradiation. A modification of these TiOィイD22ィエD2 thin films were successfully carried out by applying an advanced metal ion-implantation technique with various transition meta … More l ions such as V and Cr. The UV-Vis absorption spectra of these metal ion-implanted TiOィイD22ィエD2 thin films were found to shift smoothly toward visible light regions and exhibited the ability to decompose NOx under irradiation with visible light longer than 450nm, while at the same time, maintaining a high photocatalytic activity under UV light irradiation. Furthermore, it was found that by using a magnetron sputtering method, the preparation of unique TiOィイD22ィエD2 thin films which decompose NO efficiently under visible light irradiation, without applying the ion-implantation of transition metal ions was possible. In-situ XPS measurements revealed that the Ti/O ratio of the TiOィイD22ィエD2 thin films gradually decrease from the surface to bulk phase of the catalyst, which plays an important role in the remarkable shift of the absorption band of the films toward visible light regions. Thus, it was shown that these unique TiOィイD22ィエD2 films newly prepared by such advanced ion-engineering techniques enable the utilization of as much as 35% of the solar beams that reach the earth, showing a remarkable contrast to the activity of commonly used TiOィイD22ィエD2 thin films which can utilize only about 4%. Less

许多研究人员已经研究了使用细颗粒TiO_（22）薄膜光催化剂降解水溶液中的各种有毒化合物。本研究采用离子束法在透明多孔玻璃（PVG）上制备了TiO_（2-x）D_（22-x）D_2透明薄膜光催化剂。UV-Vis和XAFS研究表明，即使在膜厚度小于300 nm的情况下，也可以形成具有良好结晶度的均匀薄的TiO_2-TiO_2-D22-D2膜。在紫外光照射下，这些薄膜TiO_（22）O_（22）。采用先进的金属离子注入技术，采用不同的过渡金属离子，成功地对TiO_2-D_22-D_22薄膜进行了改性， ...更多信息离子如V和Cr。这些金属离子注入的TiO_（2-x）D_（22）TiO_（2-x）D_（2-x）薄膜的紫外-可见吸收光谱被发现平滑地向可见光区域移动，并且在长于450 nm的可见光照射下表现出分解NOx的能力，同时在紫外光照射下保持高的光催化活性。此外，发现通过使用磁控溅射方法，可以制备在可见光照射下有效分解NO的独特的TiO_xD_22_xD_2薄膜，而不施加过渡金属离子的离子注入。原位XPS测试结果表明，TiO_（2-x）D_2薄膜的Ti/O比从催化剂的表面到体相逐渐减小，这是薄膜吸收带明显向可见光区移动的重要原因.因此，表明通过这种先进的离子工程技术新制备的这些独特的TiO_2 O_22薄膜能够利用多达35%的到达地球的太阳光束，这与通常使用的TiO_2 O_22薄膜的活性（其只能利用约4%）形成了显著的对比。少