Fundamental Studies of Photocatalysis on TiO2 Surfaces

TiO2表面光催化基础研究

• 批准号: 9615859
• 负责人: Thomas Engel
• 金额: $ 15.2万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-02-15 至 1999-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9615859&HistoricalAwards=false
• 关键词: Fundamental; Studies; Photocatalysis; TiO2; Surfaces

Photocatalytic oxidation of organic molecules at the surface of titania shows promise as a method for the remediation of organic contaminated groundwater, and the destruction of organic contaminants. This project by Professor Engel and his students at the University of Washington, supported in the Analytical and Surface Chemistry Program, addresses the detailed mechanism of this photocatalytic oxidation reaction. Ultra high vacuum molecular beam scattering methods, coupled with scanning probe microscopy for structural characterization of the titania surface, provide detailed mechanistic and dynamic information about several model reactions. In particular, acetone, formic acid and propanol are used as model organic species, and a range of photolysis conditions and surface conditions are investigated. The photocatalytic detoxification of organic contaminated groundwater is an important environmental remediation goal. The work of this project is designed to provide the basic understanding of this photocatalysis on promising substrates such as titanium dioxide. Structural and kinetic information is combined to supply a complete picture of the photocatalytic mechanism. This information will be useful in optimizing both the catalytic surface and the conditions for environmental remediation processes.*

二氧化钛表面有机分子的光催化氧化显示出作为修复有机污染地下水和破坏有机污染物的一种方法的前景。 华盛顿大学恩格尔教授和他的学生在分析和表面化学项目的支持下开展的这个项目探讨了这种光催化氧化反应的详细机制。 超高真空分子束散射方法，与用于二氧化钛表面结构表征的扫描探针显微镜相结合，提供了有关几种模型反应的详细机械和动态信息。 特别是，使用丙酮、甲酸和丙醇作为模型有机物质，并研究了一系列光解条件和表面条件。 有机污染地下水的光催化解毒是一个重要的环境修复目标。 该项目的工作旨在提供对二氧化钛等有前景基材上的光催化作用的基本了解。 结构和动力学信息相结合，提供了光催化机制的完整图像。 这些信息将有助于优化催化表面和环境修复过程的条件。*