柴油机尾气排放的炭烟颗粒是城市雾霾天气的主要原因之一，有效地开展消除炭烟颗粒的研究已成为一项迫在眉睫的工作，对保护环境和发展经济有重要的意义。本项目拟采取简单新颖的方法制备三维有序大孔-介孔钛硅复合氧化物担载钾掺杂过渡金属氧化物纳米颗粒的新型催化剂体系，实现促进炭烟颗粒与催化剂的接触和气体小分子活化的目标，研究制备过程的影响因素和化学作用规律，发展三维有序大孔-介孔结构催化剂的制备新方法。利用多种表征手段对所制备催化剂进行结构和物化性能表征，探讨催化剂孔结构与催化性能之间的构效关系。特别是利用原位Raman-IR-MS等联用表征技术，实现原位、动态条件下捕捉和测定反应中可能存在的活性物种，研究活性组分在催化反应中的可能活性位及其结构，探讨该类催化剂催化燃烧炭烟颗粒的失活机制及反应机理。本项目的实施将为进一步设计开发高活性、高稳定性及低成本的催化燃烧炭烟颗粒催化剂提供理论指导和科学依据。

Soot particle released from diesel engine emission is one of the prime reasons for city haze. Therefore, effective elimination of soot particles has become urgent and necessary work, and it has important significance for protection of environment and development of economy. In this project, a series of novel catalysts, i.e. three-dimensional ordered macroporous-mesoporous (3DOM-m) Ti-Si composite oxides supported potassium doped transition metal oxides nanoparticles, are synthesized by simple and novel methods. Simultaneous improvements for contact of soot particles and catalysts and activation of gas molecules are to be achieved; the influence factors and rulers of chemical interaction in the preparation process are to be investigated; new preparation methods for 3DOM-m catalysts are to be developed. Multiple characterization methods are adopted to study structure and physicochemical properties of as-prepared catalysts and to investigate the structure-function relationship between pore structure of catalysts and their catalytic performances. Especially, the utilization of the combined in-situ Raman-IR-MS characterization methods is contributed to capture and determinate the possible active species under the in-situ and dynamic conditions. By investigating the possible active sites and structures of active components in the process of catalytic reaction, the inactivation and reaction mechanisms for soot combustion on the as-prepared catalysts are to be established. The implementation of this project can offer theoretical directions and scientific basis to further design and develop soot combustion catalysts with high activity, high stability and low cost.