Heterogeneous Photocatalysis on TiO2: Surface Interactions

在这个由化学系实验物理化学项目支持的项目中，塔夫茨大学的玛丽简·舒尔茨博士将使用表面特异性和频发生（SFG）来研究异质表面上的光氧化反应，以确定活性物质的性质和位置。 胺和醇，这是已知的光氧化在异质表面，将检查三个基板，纳米结构的二氧化钛;二氧化钛与氧化锡，WO 3，或氧化镉共沉积;和耦合氧化物基板覆盖二氧化钛，以阐明表面化学。 SFG也将用于研究石英上的分层生长技术。 影响空穴传输和目标绑定的参数的基本理解是适用于许多界面电荷转移过程。 异质表面的电子转移在许多过程和实际设备中起着核心作用，包括太阳能电池、现代电子元件和催化剂。 在这个项目中被检查的材料以其氧化污染物的能力而闻名。

In this project supported by the Experimental Physical Chemistry Program of the Chemistry Division, Dr. Mary Jane Shultz at Tufts University will use surface-specific sum frequency generation (SFG) to study photooxidation reactions on heterogeneous surfaces in order to identify the nature and location of reactive species. Amines and alcohols, which are known to photooxidize at heterogeneous surfaces, will be examined on three substrates, nanostructured TiO2; TiO2 codeposited with SnO2, WO3, or CdO; and coupled-oxide substrates capped with TiO2, in order to elucidate the surface chemistry. SFG will also be used to investigate a layered growth technique on quartz. A fundamental understanding of parameters affecting hole transfer and target binding is applicable to numerous interfacial charge-transfer processes. Electron transfer at heterogeneous surfaces plays a central role in numerous processes and practical devices, including solar cells, components of modern electronics, and catalysts. The materials being examined in this project are known for their ability to oxidize pollutants.