贵金属自组装体具有一系列耦合增强的物理化学特性，在新型纳米半导体光催化领域的应用前景巨大。本项目提出基于多形态Au、Ag纳米颗粒自组装体修饰磁负载TiO2纳米纤维的构建，探索贵金属的整体协同效应对材料光催化性能的增强机制。通过调控磁性纳米颗粒在纤维内表面的结构特征，解决TiO2一维纳米材料在水体净化中难以回收的问题。围绕Au、Ag纳米颗粒自组装体/TiO2纳米复合材料的形成机理及表面能带结构、半导体能量传输行为的影响机制进行探讨，研究自组装体的结构类型、分布、链长、颗粒尺寸、相对表面距离等对材料的光物理性能、载流子输运性能的调控机制，阐明局域耦合效应、肖特基效应等对光量子转换效率及光催化反应速率的增强机制，研究表面等离子体共振效应对等离激元结构的能量传输效率和光谱响应范围的影响机制。本项目的实施将形成全新的TiO2纳米复合纤维的制备关键技术，推进TiO2纳米光催化剂的实用化进程。

Self-assemblies of noble metals exhibit a series of coupling-enhanced physical and chemical properties, which has enormously potential application in the field of new-type nano-semiconductor photocatalysis. The project advances a new construction of magnetic loading TiO2 nanofibers decorated by multi-morphological self-assemblies of Au or Ag nanoparticles to explore the enhanced mechanisms of the whole synergy effect of noble metals on the photocatalytic properties of materials. The existing problem of difficult recycling in the water purification treatment process of TiO2 1D nanomaterials can be resolved by adjusting the structure characteristics of magnetic nanoparticles loaded on the inner surface of composite nanofibers. The research contents are focused on the formation mechanism of self-assemblies of Au or Ag nanoparticles/TiO2 composite nanomaterials, and the influencing mechanisms of surface energy band structure and the energy transfer behaviors of semiconductors. Regulation mechanisms of photophysical properties and carrier transport properties of composite materials will be investigated by controlling structure types, distribution, chain length, particle size, the distance on fiber surface of the self-assembly of noble metals and so on. The enhanced mechanisms of photon conversion efficiency and photocatalytic reaction rate can be illuminated by using the combination of local coupling effect and schottky effect of the self-assembly of noble metals. Furthermore, the influence mechanisms of surface plasmon resonance effect on the efficiency of energy transfer and spectral response range of plasmonic structures can be emphatically studied. The implementation of this project will be capable of developing new key technology for preparation of TiO2 composite nanofibers, eventually promoting the practical progress of TiO2 nano-sized photocatalysts.