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

• Published in: Journal of alloys and compounds 2023-01, Vol.930, p.167322, Article 167322
• Main Authors: Younes, Heba A., Taha, Mohamed, Khaled, Rehab, Mahmoud, Hamada M., Abdelhameed, Reda M.
• Format: Article
• Language: English
• Subjects: Absorption spectroscopy; Caffeine; Caffiene; Carbamezapine; Catalytic activity; Degradation; Electron microscopes; Electron microscopy; Ferrites; Free radicals; Heterojunctions; High performance liquid chromatography; Hydrogen bonding; Lanthanum compounds; Light sources; Metal organic frameworks; Monto carlo simulation; Peroviskite; Perovskites; Pharmaceuticals; Photocatalysis; Photoluminescence; Pollutants; Reaction mechanisms; Spectrum analysis; Wastewater; X ray photoelectron spectroscopy
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2022.167322

Pharmaceuticals have an ecological risk in the environment. To attenuate this efffect, Metal-organic frameworks (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 diffraction (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 photocatalyises reaction. The interaction mechanism of adsorption between pollutants and MIL-125-NH2, LaFeO3 studied by monto carlo were metal-π, π- π 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. [Display omitted] •MIL-125-NH2 was attached to perovskite using self assembly protocol.•First example of the LaFeO3/MIL-125-NH2 composite for caffeine and carbamezapine photodegradation was applied.•Unique adsorption mechanism of caffeine and carbamezapine over LaFeO3/MIL-125-NH2 were proposed.•Enhancing the photocatalytic activity performance on degradation of pharmaceutical compounds was observed.