Synthesis an‎d characterization of gold-containing composites of magnetic cellulose compounds with metal-organic UiO-66 an‎d graphene for use in nitrophenol reduction

10/19/2026 12:00:00 AM

Nitroaromatic compounds, extensively found in industrial an‎d agricultural wastewater pose a serious threat to the environment an‎d human health. Therefore, the removal of these compounds an‎d their conversion to beneficial substances such as aromatic amines in the presence of catalysts an‎d NaBH4 has attracted much attention. However, the slow dissociation kinetics of NaBH4 combined with minimal adsorption of contaminants on the catalyst surface limited the overall reduction efficiency via catalytic hydrogenation. Here, we reported a method to immobilize Au NPs on GO/Fe3O4-CMC/UiO-66-COOH. Our studies indicated that the presence of porosity, aromaticity, an‎d oxygenated groups in GO/Fe3O4-CMC/UiO-66-COOH, foster the effective absorption of BH_4^- an‎d 4-nitrophenol (4-NP), While Au NPs promote the dissociation of BH_4^- to form hydrogen species adsorbed on the catalyst surface (H_ads^*). Benefiting from the synergistic effect, Au@GO/Fe3O4-CMC/UiO-66-COOH demonstrates remarkable efficacy in the catalytic reduction of 4-NP, achieving a high turnover frequency (TOF) of 2.4 × 10-5 mmol mg-1 min-1. The finding from Kinetic, electrochemical analysis, an‎d hydrogen generation in the presence an‎d absence of NaBH4 revealed that the catalytic hydrogenation reduction of 4-NP is promoted according to the Langmuir-Hinshelwood mechanism.

چارچوب هاي فلز آلي , احياي نيتروفنول

4-Nitrophenol; Au nanoparticles; Catalytic reduction; magnetic nanoparticles; metal-organic frameworks; Graphene Oxide; Langmuir-Hinshelwood

seyed mahdi talebi

Dr.Sadegh Rostamnia