作为新兴的光电化学催化材料，多元金属氧化物的可控制备是现阶段的热点研究方向之一，然而传统方法很难获得高结晶度、表面干净且尺寸可控的多元金属氧化物纳米颗粒。液相脉冲激光辐照技术蕴含独特的选择性加热以及快速冷却等效应，目前已经实现了金属、氧化物等多种材料的结构调控及性能优化，然而关于多元金属氧化物的研究却鲜见报道。本项目拟以多元金属氧化物的可控制备及性能优化为目标牵引，紧紧围绕加热模式的开发与应用展开深入研究。并通过激光焊接技术在多元金属氧化物表面复合贵金属纳米颗粒，以进一步提高材料的光电催化性能。以选择性激光处理后的材料为构筑单元组装光电化学器件，表征并优化器件的光解水性能，揭示选择性激光辐照处理对材料光电化学性能的内在影响规律。本项目的成功实施，有望为光解水材料提供独特的结构调控方法及性能优化途径，并为选择性激光辐照技术的应用开辟新的途径。

As a novel photoelectrochemical catalysis material, the controllable preparation of multinary metal oxides is one of the hottest research topics at present. However, it is difficult to obtain highly crystalline, surface clean and size controllable multinary metal oxides nanoparticles via conventional methods. Non-focused laser irradiation in liquid phase has unique effects of selective heating and rapid cooling, which have been successfully applied to the structural control and performance optimization of a variety of materials such as metals and oxides, while the there are few related researches on the multinary metal oxides. This project will thus carry out in-depth studies on how to efficiently exploit and how to uniquely apply the selective heating characteristics of unfocused laser in liquid medium, aiming to the controllable preparation and performance optimization of the multinary metal oxides. And then, based on selective laser welding technology, noble metal nanoparticles will be welded on the surface of multinary metal oxides to further improve the photoelectrochemical catalytic properties. Finally we will construct photoelectrochemical devices based on materials treated by laser, characterize and optimize the water splitting performance, and reveal the relationship between the structural evolution of nanoparticles under the selective laser heating/welding and their photoenergy conversion performance. The successful implementation of this project is highly expected to provide an avenue of unique structural engineering and performance optimization for solar energy water splitting materials, and opens up new application ways for the laser micro-nano fabrication technology.