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

使用精细的TIO D22 YIE搜索者Howver在水溶液中的光催化降解，以避免小粒子光态的过滤和悬浮液，在此研究项目中强烈需要有效的透明d22 yie d2 yie d2 yie d2 thin thin的设计。透明的TIOO D22 YIE透明多孔Vycor玻璃（PVG）通过电离簇束（ICB）方法进行了uv-vis和XAFS的研究。发现YIE D2膜有效地将NO分解为D2，O D22 YIE D2光型在紫外线辐照。 . The Uv-Visorption of theSEAL ION-IPlanted TIO Nd to Shift Smoothly Toward Visible Light Regions and EXHIBITED THE ABILITY TO DECOMPOSE NOX Under IRRADIATION With Visible Longer Than 450nm, While at the Same Time, Maintaining A High Photocatalytic Activity UV LIGHT ON. FurtherMore ，发现通过使用磁子溅射方法，在可见光XPS XPS下，唯一的Tio II D22薄膜的制备无效地分解了。从表面降低到大部分催化剂，在膜上朝向可见的t区域中起着重要作用AS 35％的太阳海滩的利用是常用的Tio I D22 Yier D2薄膜的Elyth活性，该薄膜只能使用约4％