Perovskite/metal-organic framework photocatalyst: A novel nominee for eco-friendly uptake of pharmaceuticals from wastewater

Pharmaceuticals have an ecological risk in the environment. To attenuate this efffect, Metal-organic fra-meworks (MOFs) and its composite with peroviskite have been used in photocatalysis of carbamezpine and caffiene. MIL-125-NH2, LaFeO3, LaFeO3/MIL-125-NH2 have been prepared and characterized by X-ray dif-fraction (XRD), FT-IR, BET, scanning electron microscope (SEM), Transmission Electron Microscopy (TEM), Photoluminescence (PL) spectrum, UV-vis absorption spectroscopy and X-ray photo-electron spectroscopy. Their photocatalytic activity were investigated by solar simluator light source. High performance liquid chromatography was used for detction of carbamezpine, caffeine at different time intervals of photo-catalyises reaction. The interaction mechanism of adsorption between pollutants and MIL-125-NH2, LaFeO3 studied by monto carlo were metal-n, n-n stacking, and hydrogen bonding. The maximum loading was higher for caffiene (CAF) than carbamezapine (CBZ). The optimized LaFeO3/MIL-125-NH2 composite have excellent degradtion effeciency due to efficient heterojunctions formation and separation of charges. Caffiene showed a higher degradtion than carbamezpine in one hour (i.e., carbamezapine, 74% and caffiene 87% by LaFeO3/MIL-125-NH2). This successful photocatalytic activity was due to superoxide, hydroxyl free radicals active species. The intermediates resulted from carbamezapine and caffiene degradation using LaFeO3/MIL-125-NH2 catalyst were identified by HPLC/MS.MS. (c) 2022 Elsevier B.V. All rights reserved.

Automated summary

This study investigates the degradation of carbamazepine and caffeine using metal-organic frameworks and perovskite composite in photocatalytic reactions. The materials were characterized using various techniques, and the degradation efficiency and mechanisms were studied. The results showed that caffeine had a higher degradation rate compared to carbamazepine, and the intermediates were identified using HPLC/MS.MS.