Research progress of MIL-125 and its modifications in photocatalytic hydrogen evolution

Abstract

MIL-125, a titanium-based metal–organic framework (MOF) material with ultra-high specific surface area, large porosity, tunable structure, modifiable functionality, and multiple active sites, is commonly researched in the field of photocatalytic hydrogen evolution. However, MIL-125 still could not be directly used for practical application in photocatalytic hydrogen evolution because of its limited photoresponse. Therefore, it is necessary to systematically summarize the research on MIL-125 in the field of photocatalytic hydrogen evolution for its further development as well as that of other MOF materials. For MIL-125 photocatalysts, further modifications for promoting the photocatalytic activity of photocatalysts and improving the stability of photocatalysts are needed. Typical modification methods of MIL-125 include engineering functional groups and surface structure, doping metal ions, loading cocatalysts, and structuring composites. In this review, the research progress of MIL-125 in the field of photocatalytic hydrogen evolution is summarized, including its modification methods, photocatalytic hydrogen evolution activities, and micro-mechanisms. In view of the deficiencies and limitations of the current research, future developments of MIL-125 are prospected.