Three novel MOFs with various dimensions as efficient Fenton-like photocatalysts for degradation of Rhodamine B

Three novel metal organic frameworks (MOFs) including {[Zn3(nip)3(TPPA)3]·3 DMF·H2O}n (1), [Co(NH2-bdc)(TPPA)(H2O)]n (2) and [Cd2(NH2-bdc)2(TPPA)2]n (3) (TPPA = tri(4-pyridylphenyl)amine, H2-nip = 5-Nitroisophthalic acid, NH2-bdc = 2-Aminoterephthalic acid) were successfully prepared under hydrothermal conditions. X-ray single crystal analyses revealed that MOFs 1–3 possess 3D architecture. Impressively, all of them can function as a highly photocatalyst for degradation of Rhodamine B (RhB) dye under low-energy irradiation of a 150 W Xenon lamp. Moreover, the photocatalytic performance is significantly improved after the addition of H2O2, which could be attributed to their high efficiencies in generating OH and O2− radicals. In addition, MOFs 1–3 showed very stable activity in the degradation of RhB, and showed no significant loss of activity after three consecutive uses.