Highly Efficient Silver Nanoparticles Supported Nanocrystalline Zirconosilicate Catalyst for the Epoxidation and Hydration Reactions

Abstract

Nanocrystalline zirconosilicate with MFI framework structure was hydrothermally synthesized by the addition of amphiphilic organosilane in the synthesis composition of conventional zirconosilicate. Silver nanoparticles were supported on the surface of nanocrystalline zirconosilicate. Catalyst exhibited exceptional high activity in the epoxidation of olefins. Application of the catalyst was extended in the green catalytic hydration reaction of alkynes and nitriles. Hydration reaction using zirconosilicate does not involve toxic metals or corrosive acidic condition. Bi‐functional nature of the catalyst and optimum polarizability of Zr present in the zeolite matrix are responsible for the high catalytic activity. Recycling and leaching experiments suggest that the catalyst can be reused without significant loss in the activity. Nanocrystalline zirconosilicate offers several attractive features such as sustainable synthetic route, stability, high yields, and recyclability.

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“…This intermediate is converted to the final product and releases the Ag 0 catalyst for the next catalytic cycle. 75 TBHP serves as a source of reactive oxygen radicals (e.g., t-BuO ), which would act upon benzyl alcohol to generate benzaldehyde in situ. Then in the next step benzaldehyde could convert to benzoic acid.…”

Stimuli-Responsive Polymer Stabilized Iron Oxide Nanoparticle as Green Catalyst for Styrene Oxidation Reaction

“…Homogeneous catalysts that have been extensively used to catalyze chemical reactions have poor recoverability, limited reusability, and stability. − In order to overcome these limitations, heterogeneous catalysts which are more efficient and ecofriendly are being explored. Many studies have been conducted where supported precious metals like gold and silver have been used as a catalyst for the oxidative functionalization of styrene. , Transition metals are also suitable for oxidizing olefins. , Compared with the conventional catalyst, inorganic nanoparticles are more catalytically efficient due to a large number of active sites and trouble-free recovery from reaction media. , Nowadays, inorganic nanoparticles are used as catalysts for a vast number of reactions, for example, hydro-deoxygenation of anisole, polluted water treatment, toxic dye degradation, , hydrogen production, electrode material for Li-ion battery, degradations of phenol and toluene, etc. Particularly, inorganic nanoparticles with magnetic properties have attracted substantial attention from an academic and an industrial perspective. − Supports like alumina, silica, organic molecules, and polymers are used in heterogeneous catalysts to increase the surface area and effectivity. − However, phase separation in a heterogeneous reaction system limits the accessibility of the substrate to the catalytic surface.…”

“…Many studies have been conducted where supported precious metals like gold and silver have been used as a catalyst for the oxidative functionalization of styrene. 14,15 Transition metals are also suitable for oxidizing olefins. 7,16 Compared with the conventional catalyst, inorganic nanoparticles are more catalytically efficient due to a large number of active sites and trouble-free recovery from reaction media.…”