Magnéli相钛氧化物光热材料构效研究与水蒸发性能强化

光热转换材料能够高效吸收太阳能并转换为热能，因而在海水淡化、光热发电、生物杀菌等领域具有广泛的应用前景。无机半导体材料由于吸光性能好、成本低、易功能化成为光热转换材料的研究热点，但普遍存在宽光谱吸收率和长期服役稳定性不够等问题。本项目提出通过Magnéli相TinO2n-1系列钛氧化物结构和性能调控来探索制备新型光热转换材料的创新思路，利用含钛尾矿尾渣为原料通过氧化还原路线规模化制备该类材料的技术路线，有望合成禁带宽度窄、吸收光谱宽、稳定性高以及矿物资源丰富的Ti-O系高效光热转换材料。本项目从材料特殊结构和太阳光热转换利用角度出发，探索结构和性能关系，深入揭示光热转换内在机制，为新型光热材料的设计制备奠定理论和实验基础，有望创新性的同时满足化工资源绿色高效利用和太阳能清洁能源大规模应用的需求。

Photo-thermal conversion materials can efficiently absorb solar energy and convert it into heat energy, and thus have a wide range of application prospects in the fields of seawater desalination, solar-thermal power generation, biological sterilization and so on. Due to good solar absorption, low cost and easy functionalization, inorganic semiconductors become hot research field as photo-thermal conversion materials. However, they have the problem of difficult large-scale preparation and environmental instability. This project proposes an innovative idea for the preparation of a new type of photo-thermal conversion material through the regulation of the structure and properties of the Magnéli phase TinO2n-1 series titanium oxide. It is expected to synthesize Ti-O-based material with high-efficiency photo-thermal conversion, narrow band gaps, wide absorption spectrum, high stability and rich mineral resources, and to explore techniques for the large-scale preparation of such materials from hydrometallurgical routes using titanium-containing raw minerals. This project investigates the relationship between structure and performance from the perspective of the special structure of materials and solar energy absorption and utilization. It further reveals the internal mechanism of photo-thermal conversion and provides a theoretical foundation for the design and preparation of this new types of photo-thermal conversion materials. It is hopeful to innovatively meet the demands for the green recycling of chemical resources and large-scale applications of solar energy and clean energy at the same time.