水体中有机污染物的去除方法和材料是目前国内外普遍关注的研究课题，开展对水体中低浓度、高毒性和难降解有机污染物去除的光催化剂的设计及其降解机制的研究，对发展低成本、高效和稳定的光催化剂有着重要的指导意义。本项目设计具有内空腔和异质结构的球状Cu2O@void@TiO2复合光催化剂，并探索其内空腔大小和异质结面积大小可以调控的合成原理和方法；系统研究具有内空腔异质结构的Cu2O@void@TiO2复合光催化剂在紫外-可见光和可见光条件下对有机污染物降解的动力学过程及其催化降解机理；结合该光催化剂对有机污染物降解的动力学过程及其降解机理，揭示内空腔大小和异质结面积大小在紫外-可见光和可见光条件下对催化性能的影响规律。预期成果将为开发去除有机污染物的光催化剂提供理论基础和技术支持；同时，有利于进一步推进TiO2及其复合光催化剂在可见光的范围内高效去除低浓度、高毒性和难降解有机污染物在实际中的应用。

The method and material development for organic pollutants removal in water is a cosmopolitan widespread concerned research topic. The design of photocatalysts and their photodegradation mechanism study to remove the low concentration, high toxicity, refractory organic pollutants are meaningful for the development of low-cost, highly efficient and stable photodegradation material. In the current project，sphere-like Cu2O@void@TiO2 nanocomposite photocatalyst with tunable inner void and heterostructure is designed；And the theory and method for preparation of the tunable inner void and heterostructure of the nanocomposite will be also explored. The kinetics and mechanism of photocatalytic degradation of organic pollutant for Cu2O@void@TiO2 composite photocatalyst with tunable inner void and heterostructure will be systematicly studied under UV-visible and Visible light irradiation. Combining with the kinetics analysis and mechanism of photocatalytic degradation of organic pollutant process, the photocatalytic performance of the photocatalyst as the function of the inner void and heterostructure will be clearly revealed. The expected results will supply both the theoretic insight and the technique direction for the development of low-cost, highly efficient and stable photocatalysts for oganic pollutants removal in water. In addtion, it is also advantageous to further promote the actual application of TiO2 and its composite photocatalyst for the highly efficient removal of the low concentration, high toxicity, refractory organic pollutants in water under Visible light irradiation.