Colloids and Surfaces A 538 (2018) 387–392 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Research paper Covalent functionalization of graphene oxide with molybdenum-carboxylate complexes: New reusable catalysts for the epoxidation of oleﬁns M. Masteri-Farahani , S. Mirshekar Faculty of Chemistry, Kharazmi University, Tehran, Islamic Republic of Iran GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: New graphene oxide (GO) and reduced graphene oxide (rGO) supported molybdenum catalysts were designed Graphene oxide for the epoxidation of oleﬁns. First, the surfaces of GO and rGO were functionalized with appropriate carboxylic Heterogenization acid ligands. Complexation of the supported carboxylic acid ligands with bis(acetylacetonato)dioxomolybdenum Catalyst (VI) resulted in the formation of desired heterogeneous molybdenum catalysts. Characterization of the prepared Molybdenum catalysts was performed with various techniques such as Fourier transform infrared (FT-IR) and inductively Epoxidation coupled plasma optical emission (ICP-OES) spectroscopies, X-ray diﬀraction (XRD) analysis, transmission elec- tron microscopy (TEM), and N adsorption-desorption analysis which conﬁrmed the successful immobilization of molybdenum-carboxylate complexes on the surfaces of GO and rGO. The obtained catalysts showed high cat- alytic activities in the selective epoxidation of oleﬁns with tert-butylhydroperoxide (TBHP). Also, the hetero- geneous catalysts were recycled without remarkable decrease in
Geoderma – Elsevier
Published: Feb 15, 2019
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