Five functional Cd/Zn-based MOFs constructed from V-shaped tricarboxylate ligand for rapidly selective adsorption and efficiently photocatalytic degradation of hazardous aromatic dyes

In this work, five novel Cd/Zn-based MOFs with different topological framework, namely {[Cd(bimb)(Hbipa)]·H2O}n (1), {[Cd3(dimb)3(bipa)2(H2O)2]·2H2O}n (2), [Cd(bimd)(Hbipa)(H2O)]n (3), {[Zn(bipd)(Hbipa)]·H2O}n (4) and [Zn(bimb)(Hbipa)]n (5) had been synthesized and characterized. Worth noting, Complex 1 and 2 had effective separation behaviors towards MO and MBE dyes respectively, which could reach the adsorption equilibrium within a quite short time even if there existed another kind of dye in the system. Meanwhile, Complex 3–5 showed great performance in CR adsorption. Additionally, Complex 3–5 also showed excellent photocatalytic degradation capabilities toward MB and MV dyes under UV irradiation. According to the study, these five metal-organic frameworks can be used as a kind of functional materials in the adsorption and photocatalytic degradation of organic dyes in wastewater.