浸渍法制备Ni-L/g-C3N4复合材料及其光催化产氢性能研究

Preparation of Ni-L/g-C3N4 Composite by Impregnation and Its Photocatalytic Performance for Hydrogen Production

通过金属-有机骨架(MOF)-模板设计策略,制备具有优异光催化活性的非贵金属助催化剂/固溶体异质结Ni-L/g-C3N4.通过调节g-C3N4与Ni配合物(Ni-L)负载浓度,微调异质结的化学组成和带隙,并进一步优化光吸收能力和光催化活性,获得最佳产生氢气速率为23.69μmol·g^-1·h^-1,且在可见光照射下(λ>420nm)具有较高的稳定性和可回收性.进一步的表征和DFT计算揭示了异质结和光催化活性之间的关系,并证实Ni-L/g-C3N4在加速水解离动力学中的重要性.

In this paper,a non-precious metal promoter/solid solution heterojunction Ni-L/g-C 3N 4 with excellent photocatalytic activity was prepared by metal-organic framework(MOF)-template design strategy.By adjusting the loading concentration of g-C 3N 4 and Ni complexes,fine-tuning the chemical composition and band gap of the heterojunction,and further optimizing the light absorption capacity and photocatalytic activity,the optimal hydrogen production rate was 23.69 μmol · g ^-1 · h ^-1 .And it has high stability and recyclability under visible light irradiation(λ> 420 nm).Further characterization and DFT calculations revealed the relationship between heterojunction and photocatalytic activity and confirmed the importance of Ni-L/g-C 3N 4 in accelerating hydrolytic dissociation kinetics.