Comprehensive preparation and catalytic activities of Co/TEMPO-cellulose nanocomposites: A promising green catalyst

Autor: Nouaamane El Idrissi, Larbi Belachemi, Nicolas Merle, Philippe Zinck, Hamid Kaddami
Přispěvatelé: Laboratoire des Matériaux Innovants, Energie et Développement Durable [Marrakech] (IMED-Lab ), Faculté des Sciences et Techniques Marrakech (FSTG), Université Cadi Ayyad [Marrakech] (UCA)-Université Cadi Ayyad [Marrakech] (UCA), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), UCCS Équipe Catalyse et synthèse éco-compatible, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Rok vydání: 2022
Předmět:
Zdroj: Carbohydrate Polymers
Carbohydrate Polymers, 2022, Carbohydrate Polymers, 295, pp.119765. ⟨10.1016/j.carbpol.2022.119765⟩
ISSN: 1879-1344
0144-8617
Popis: International audience; A green method for the production of cobalt/(TEMPO-Cellulose) aerogel heterogeneous catalyst was developed. The preparation implied the reduction of CoSO4 by NaBH4 in TEMPO-Cellulose water dispersion in ambient conditions. The formation of Cobalt nanoparticles is due to the presence of “TEMPO-Cell” which screens the Co2+ ions and prevents their combination with boron. SEM, XRD, EDX, FTIR, TEM and XPS were used to analyze the structure of the catalyst and showed that metallic cobalt particles have nanometric size and are well dispersed in the aerogel. The catalyst showed excellent activity for model reactions such as the reduction of 4-nitroaniline, 4-nitrophenol and 2-nitrophenol in water, in the presence of NaBH4. The reaction kinetic was studied by UV–visible spectroscopy, which showed that this catalyst is efficient to achieve 100 % reduction with high reaction rate and turnover frequency. The aerogel catalyst was reused more than ten times without significant loss of its catalytic activity.
Databáze: OpenAIRE
Externí odkaz: