RIMI: Fundamental Studies of TiO2 Photocatalysts for the Treatment of Hazardous Waste

9353208 Datye该研究将从根本上研究二氧化钛基催化剂处理危险废物的反应机理。 例如，目前正在评估这一技术用于处理受污染的地下水、化学废物流、室内空气净化和饮用水中污染物的解毒。 该工艺使用二氧化钛粉末作为光催化剂，当暴露于紫外光时，具有氧化有机物的能力，同时还原溶解的金属，如Cr（VI），Hg（II）和Ag（I）。 有机物转化为CO2，H2O和其他无机产物。 通常，金属作为金属微晶固定在光催化剂上。 在光催化商业化之前，需要对催化剂失活有一个基本的了解，以便制定合适的策略来提高寿命和再生。 拟议研究的目标是使用已建立的催化剂表征技术和陶瓷合成路线，以提高二氧化钛光催化剂的性能。***

9353208 Datye The research will fundamentally investigate the reactive mechanisms of titanium dioxide-based photocatalysis for treating hazardous waste. For instance, this technology is presently being evaluated for treatment of contaminated groundwater, chemical waste streams, indoor air purification and for detoxification of contaminants in drinking water. The process uses titanium dioxide powder as the photocatalyst which when exposed to ultraviolet light, has the capacity to oxidize organics while reducing dissolved metals like Cr(VI), Hg(II) and Ag(I). Organics are converted to CO2, H2O, and other inorganic products. The metals, in general, are immobilized onto the photocatalyst as metallic crystallites. Prior to commercialization of photocatylsis, a need exists to develop a fundamental understanding of catalyst deactivation so that suitablestrategies for improving lifetime and regeneration. The goal of the proposed research is to use established catalyst characterization techniques and ceramic synthesis routes to improve the performance of TiO2 photocatalysts. ***