Copper and Nickel Modified MCM-41 An Efficient Catalyst for Hydrodehalogenation of Chlorobenzene at Room Temperature

Abstract

The paper reports preparation, surface, and textural characterization of Cu and Ni modified MCM-41 and its application for hydrodehalogenation of chlorobenzene. A series of Cu/Ni modified MCM-41 samples were synthesized by the co-condensation method by varying the amount of Ni and further characterized by various physicochemical methods. The incorporation of metals in the framework of mesoporous silica matrix was confirmed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies showed the formation of uniform spherical particles on the support surface. The catalytic activity of the samples was evaluated toward the hydrodehalogenation reaction of chlorobenzene at room temperature. Samples containing Si/(Cu + Ni) = 10 showed the highest chlorobenzene (98%) conversion with 100% selectivity for benzene. Among the various solvents studied for the reaction, isopropyl alcohol gave the best results at 2 h of reaction time. The effect of various halogen substituent and different electron donating and withdrawing groups on chlorobenzene is also studied to optimize the reaction conditions.

Immobilization of cerium (IV) and erbium (III) in mesoporous MCM‐41: Two novel and highly active heterogeneous catalysts for the synthesis of 5‐substituted tetrazoles, and chemo‐ and homoselective oxidation of sulfides

“…This band corresponds to the vibrations of Si‐OH, but the intensity of the band increases and shifts to a lower wavenumber when metals are introduced. This is evidence of immobilization of a heteroatom into the mesoporous MCM‐41 . These results indicate that the functionalization of MCM‐41 surface by Serine and then by metal ions has successfully occurred.…”

Matrix assisted low temperature growth of graphene

“…Copper is known to act as an excellent catalyst for chlorobenzene dehalogenation under ambient hydrogen conditions to form benzene [44]. Moreover, aromatic molecules such as benzene readily form stable cyclic C 6 fragments upon adsorption onto the catalytic copper surface, facilitated by their relatively low activation barrier to dehydrogenation [24].…”

Transition metal/metal oxide modified MCM-41 for pollutant degradation and hydrogen energy production: a review

“…Parida et al 54 extensively studied the Cu/Ni modied MCM-41 and found that the catalysts are well-ordered spherical particles. Parida et al 54 extensively studied the Cu/Ni modied MCM-41 and found that the catalysts are well-ordered spherical particles.…”

“…TEM images of the bimetallic mesoporous molecular sieves are characteristics for the mesoporous materials with hexagonal 54 From the gure, it is conrmed that the particles are spherical in nature and the metal particles are well dispersed throughout the silica framework. The particle size is calculated to be in between 0.2 to 0.5 mm.…”