Heterogeneous Photocatalysis on TiO2: Surface Interactions

在这项由化学系实验物理化学计划支持的项目中，塔夫茨大学的Mary Jane Shultz博士将使用表面特定和频率产生(SFG)来研究非均相表面上的光氧化反应，以确定活性物种的性质和位置。胺和醇是已知在非均相表面上光氧化的物质，将在三种底物上进行检测，即纳米结构的二氧化钛；与SnO2、WO或CDO共沉积的二氧化钛；以及以二氧化钛为封端的偶合氧化物基板，以阐明表面化学。SFG还将用于研究在石英上的层状生长技术。对影响空穴转移和靶结合的参数的基本理解适用于许多界面电荷转移过程。在太阳能电池、现代电子元件和催化剂等众多工艺和实用器件中，非均质表面的电子转移起着核心作用。这个项目中正在研究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.