“…MOFs are a class of crystalline porous materials constituted by rigid and even flexible organic ligands coordinated through Coulombic and/or coordinative bonds to metal ions or metal clusters. − Initially, MOFs were tested for gas adsorption and separation, − but immediately the potential of these materials in other areas and particularly for catalysis and photocatalysis was recognized. − Particularly, the use of MOFs as photocatalysts has attracted a large interest due to the combination of unique properties that MOFs meet. − Among them, the most important ones are light harvesting by tunable organic linkers and efficient charge separation due to the intimate contact between the linkers and nodal metals. , The reader is referred to some existing reviews dealing with the MOFs as photocatalysts for different applications other than OWS, including water treatment, − pollutant degradation, ,− and solar fuels ,,− production among others. − …”