开展新型持久性有机污染物六溴环十二烷在贵金属与金属氧化物之间的多元复合纳米催化材料上的热催化降解研究，对于发展持久性有机污染物控制方法和原理具有重要的意义。本项目将构筑贵金属钯与锆氧化物、钇氧化物、铈氧化物、铁氧化物等金属氧化物的多元复合纳米催化材料，考察多元复合纳米催化材料的酸碱和氧化还原等固表面性质,揭示其在六溴环十二烷降解过程中所起的作用，评价六溴环十二烷在多元复合纳米催化材料上的降解活性，研究六溴环十二烷不同类型异构体及其手性对映体对降解活性的影响，揭示立体结构-降解活性的关系，分析和鉴定六溴环十二烷不同类型异构体在多元复合纳米催化材料上的加氢脱溴产物和氧化降解产物，研究不同类型异构体对降解产物的类型和相对分布强度的影响，全面揭示新型持久性有机污染物六溴环十二烷在多元复合催化纳米材料上的氧化还原微界面降解机制，为持久性有机污染物的污染治理提供科学支撑。

Hexabromocyclododecanes (HBCDs) are a new type of persistent organic pollutants (POPs). The performance for its degradation over multicomponent composite catalytic nanomaterials of noble metal and metal oxides is of great significance for the development of POPs control method and principle. In this project, multicomponent composite catalytic nanomaterials will be prepared containing Pd and metal oxides such as zirconium oxide, yttrium oxides, cerium oxide and iron oxide. The nature of solid and surface, such as acid-base types and intensity, and redox properties, will be analyzed for as-prepared nanomaterials. Their roles during hexabromocyclododecane degradation will be studied. The degradation efficiency for the HBCD diastereoisomer and enantiomer over multicomponent nanomaterials will be determined, and the effect of HBCD structure on the degradation activity will be revealed. The hydrodebrominated products and oxidative degradation products for HBCD diastereoisomers will be analyzed. The effect of the HBCD diastereoisome structures on the product types and their relative distribution strength will be studied. The redox degradation mechanism of HBCDs over multicomponent composite catalytic nanomaterials will be revealed, which will provide a theoretical basis for the control of POPs.