过渡金属碳/氮化物基光催化剂的研究进展

Research progress on transition metal carbon/nitride based photocatalysts

光催化作为一种清洁和可持续的技术,具有解决环境问题和能源危机的潜力,已成为研究的焦点。贵金属共催化剂的负载可以大大提高半导体的光催化效率。由于贵金属的高成本和稀缺性明显限制了其大规模应用,作为新型过渡金属碳/氮化物(MXenes),由于其优异的金属导电性、大的比表面积和合适的费米能级,已成为贵金属共催化剂的良好替代品。许多理论和实验研究表明,MXenes的性能严重依赖于其尺寸。总结了MXenes和MXenes衍生的0D量子点(MQDs)的合成路线,综述了MXenes基光催化剂复合材料的制备,阐述了MXenes作为共催化剂的光催化机理,提出了未来对MXenes的研究所面临的挑战和展望。

Photocatalysis has become the focus of research as a clean and sustainable technology with the potential to solve environmental problems and energy crises.The loading of noble metal cocatalyst can greatly improve the photocatalytic efficiency of semiconductor.The high cost and scarcity of precious metals obviously limit their large-scale application.As new transition metal,carbides and nitrides(MXenes),have become good substitute for noble metal cocatalysts due to their excellent metal conductivity,large specific surface area and suitable Fermi level.Many theoretical and experimental studies have shown that the performance of MXenes is critically dependent on their size.The synthesis route of MXenes and MXenes-derived 0D quantum dots(MQDs)was summarized,the preparation of MXenes-based photocatalyst composites was reviewed,the photocatalytic mechanism of MXenes as a co-catalyst was described,and the challenges and prospects of MXenes research in the future were put forward.