2026-10-12T16:45:41Z https://www.scidb.cn/oai

10.57760/sciencedb.011gw 2026-09-04T16:51:04Z

2026-09-04 Effect and Mechanism of Surface Functional Group Modification on Photocatalytic Hydrogen Production Performance of Ti-MOF doi:10.57760/sciencedb.011gw en Surface conjugation engineering is an efficient strategy to enhance the photocatalytic performance of MOFs. In this work, MIL-125(Ti) was chosen as the parent framework, and three Ti-MOF nanocatalysts with distinct surface functional groups (amino, imine, amide) were synthesized through a post-synthetic modification method. All of the above conjugated surface structures were tested to see how they changed the photophysical properties and hydrogen-evolution activity. Spectroscopic characterization revealed that the amide-functionalized (CONH2-MIL-125(Ti)) exhibited the highest light-harvesting capacity and the longest fluorescence lifetime (89.65 ns). The p-π conjugation effect effectively enhances the electronic properties of the material and promotes the separation of photogenerated charge carriers. Photocatalytic hydrogen evolution performance displayed that CONH2-MIL-125(Ti) exhibited the best performance, and the hydrogen evolution rates increased by 25.5% and 73.4% over those of CN-MIL-125(Ti) and NH2-MIL-125(Ti), respectively. Under the mild alkaline conditions (pH 8), abundant protons on the reaction interface accelerate the hydrogen evolution kinetics. Benefiting from the extended p-π conjugated system, amide grafting simultaneously strengthens light absorption and suppresses charge recombination. Therefore, the amide modification strategy provides a reliable approach to regulate and improve the photocatalytic hydrogen evolution performance of Ti-based MOFs. conjugated structure; Ti-MOF; photocatalysis; surface modification Li Weijie Yang Feiling Hu Xinyu Liu Hongxia EMBARGO https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset Science Data Bank