针对含油废水中浓度低、有毒、难降解有机污染物深度去除的难题，本项目拟创新设计与合成具有三维有序大孔(3DOM)结构和空心结构的M@TiO2(M=CdS, Fe2O3, WO3)复合纳米光催化材料，利用3DOM结构和空心结构丰富的功能特性实现有毒大分子污染物的高效吸附和捕获；利用两种不同带隙宽度半导体耦合而形成的异质结构，构成定向电荷通道，实现光生电荷的高效分离，有效提高对可见光响应能力和光催化量子效率。利用各种光谱技术表征复合纳米材料的表面物理化学与光物理化学性能，探索针对典型水污染物治理的纳米材料新体系绿色制备和新合成方法，研究有毒污染物在多维孔道中的扩散和捕获过程以及光生载流子的界面迁移转换规律，揭示催化剂微观构型与催化性能之间的关系，实现纳米材料功能设计可调。本项目不仅为高效处理难降解污染物提供一条崭新的途径，同时对促进化学、材料、环境等学科的交叉融合，具有重要的学术意义和应用价值。

This proposal is motivated by the in-depth treatment of the low concentration and refractory toxic pollutants in the petroleum refinery effluents(PRE). Based on the solar-light-driven photocatalytic technique, the main focus of the proposed research is the study and preparation of a series of visible light-responsive M@TiO2 (M=CdS, Fe2O3, WO3) composite semiconductor materials with three-dimensionally-ordered macroporous (3DOM) and hollow structures. The presence of 3DOM and hollow structures are benefited for the high adsorption and capture of macromolecules organic pollutants. Meanwhile, the formation of heterojunctions through coupling two different energy band gap semiconductors can constitute a directional charge channel, leading to the increase of electron-hole pair separation efficiency and the enhancement of the quantum yield of photocatalyst. The as-prepared samples would be characterized using various analysis technologies to investigate their surface physical-chemistry and optical physical-chemistry properties. According to the characterization results, the novel and efficient method of preparing the M@TiO2 composite nanomaterials will be developed, and the diffusion and capture process of toxic pollutants in the multi-dimensional porous structure, as well as the mechanism for the transfer of photogenerated charge carriers will be investigated. The relationships between micro-architectures and the catalytic performance of M@TiO2 composite materilas for photocatalytic degradation of PRE will also be studied, and this could help to achieve the advanced tunable functions for the synthesis of composite nanomaterials. Furthermore, this proposal will not only provide a new and significant approache to treat the PRE organic wastewater, but also promote the amalgamation of chemistry, materials, energy sources and environmental　subject, which have an important academic significance and application value.