中空铁酸盐/石墨炔多维可见光催化剂的制备及photo-Fenton应用研究

光催化剂可将太阳能转化为化学能，在光催化辅助Fenton反应降解废水中具有独特优势。铁酸盐能吸收可见光而产生催化活性，价格低廉，化学性质稳定，其优异的磁性还有助于催化剂的回收和重复使用。但是，铁酸盐产生的光生载流子会快速复合，因而被直接用作光催化剂时其活性不够理想。通过构建异质结，创造充足的光子阱，是防止光生载流子复合，提升光催化活性的有效手段，而兼具三角孔洞结构、富电子特性和半导体带隙等优势的石墨炔，是理想的增强相材料。作为我国科学家首先合成、研究较早的新型碳同素异形体，在我国开展石墨炔复合材料的研发还具有一定的技术和基础优势。基于此，本项目拟在近年来对铁酸盐的可控制备及其复合材料的研发基础上，通过在中空铁酸盐界面原位生长石墨炔，并结合磁场辅助手段，可控制备一系列多维度、性能优异的可见光催化剂，将其应用于photo-Fenton反应，无害化降解有机废水。

Photocatalyst can convert solar energy into chemical energy, has unique advantages in photocatalysis assisted Fenton-reaction to degrade wastewater. Ferrates exhibit excellent catalytic activity by absorbing visible light, with the advantages of low price and stable chemical properties, their excellent magnetism also contributes to the recovery and reuse of catalysts. However, the photogenic carriers produced by ferrates are easy to recombine quickly, so their activity is not ideal when used as photocatalyst directly. The construction of heterojunction and the creation of sufficient photon trap are effective means to prevent the photogenic carrier from recombination and improve the photocatalytic activity. Graphdiyne, which has the advantages of triangular hole structure, rich electron characteristics and semiconductor band gap, is an ideal reinforcing-phase for photocatalyst. In addition, graphdiyne was first synthesized by Chinese scientists and studied earlier, so the research and development of graphdiyne composites in China has certain advantages in technology and research foundation. In this project, based on our research and development of ferrite composites, a series of multi-dimensional visible light catalysts with excellent performance will be prepared by hollow-structure designation of ferrite and in situ growth of graphdiyne at its interface. With the assistance of magnetic field, a series of multi-dimensional visible light catalysts with excellent performance will be prepared and applied to photo-Fenton reaction for harmlessly degrade organic wastewater.