【摘要】 UiO-66-NH₂（NUO）因具有优异的水稳定性被用于光催化分解水制氢,但其制氢效率仍有待提升.本文在NUO前驱体溶液中加入2-（2-芴基）-4,5-1-溴二苯基-咪唑（EI）和二氧化钛P25,采用水热法合成EI/P25/NUO异质结.与单一Zr-MOFs和二元EI/NUO相比,EI/P25/NUO异质结可见光驱动的光催化产氢速率可达6530.60μmol·g^-1·h^-1,分别为NUO和EI/NUO产氢速率的304倍和34倍.这是由于EI的引入可有效提高体系中光生载流子的浓度,电子传输层P25则可促进EI产生的光生电子向NUO间的转移,降低光生载流子的复合几率,从而进一步提升光催化分解水制氢性能.更多还原

【Abstract】 UiO-66-NH₂（NUO） has been used for photocatalytic hydrogen generation due to its excellent water stability,but its hydrogen production efficiency still needs to be improved.In this paper,EI/P25/NUO heterojunction was synthesized by adding 2-（2-fluorenyl）-4,5-1-bromodiphenyl-imidazole（EI） and P25 in NUO precursor solution via hydrothermal method.Compared with single Zr-MOFs and binary EI/NUO,the visible-light-driven photocatalytic hydrogen production rate of the EI/P25/NUO heterojunction can reach 6530.60μmol·g^-1·h^-1,which is 304 times and34 times higher than that of NUO and EI/NUO,respectively.This is because the introduction of EI can effectively improve the concentration of photogenerated carriers in the system,and the electron transport layer P25 can promote the transfer of photogenerated electrons generated by EI to NUO,reduce the recombination probability of photogenerated carriers,and further improve the performance of photocatalytic water decomposition for hydrogen production.更多还原