Synthesis of a Novel Magnetically Retrievable Nanocomposite with Au Nanocatalysts for Hydration Reaction

Abstract

Developing efficient catalysts with good recyclability is of great importance for its practical applications. In this study, a novel magnetically retrievable nanocomposite (Au-SiO2@Fe3O4-RGO) was synthesized for catalyzing hydration reaction. Active Au nanoparticles are deposited on core-shell SiO2@Fe3O4, which are further supported by a two-dimensional reduced graphene oxide (RGO) platform. The prepared Au-SiO2@Fe3O4-RGO was proven to be efficient as well as recyclable. An excellent catalytic performance, with 97% yield towards the hydration of phenylacetylene, was achieved for the catalyst in dioxane. Remarkably, the catalyst can be readily recycled through magnetic separation and achieved superior catalyst recovery and stability after seven cycles without any metal leaching. This work provides a strategy to fabricate recyclable and durable catalysts for industrial applications.

Magnetic graphene noble metal aerogels: preparation and application for catalytic degradation of 4-NP

“…13 Among them, the materials prepared by Au and graphene oxide are often tricky because they are challenging to recover. 14 In this paper, by introducing magnetic iron oxide into composites, we hope to obtain materials that can be attracted and controlled using magnets to solve the problem of difficulty in recovering materials to a certain extent.…”

Design, preparation and characterization of Fe3O4@SiO2@ECH@thiocarbazide@Au(i)@chitosan nanoparticles as a catalyst for the synthesis of 3,4-dihydropyrano[3,2-c]chromenes

“…Gold nanoparticles (Au NPs) have attracted more and more attention because of their unique electrical and thermal properties and also, have been widely studied as catalysts due to the strong Lowis acid nature of gold for various reactions [14]. Fe3O4@SiO2@Pd-Au, RGO@Fe3O4@SiO2@Au were used in the synthesis of hydrodechlorination, and hydration, respectively [15][16]. Tsunoyama and coworkers,[17] demonstrated that the catalytic activity of AuNPs is impacted by several factors including particle size and the surface area of nanoparticles which is inversely proportional to the particle size, but directly proportional to the surface area of AuNPs [18][19].…”

“…14 Fe 3 O 4 @SiO 2 @Pd-Au and RGO@Fe 3 O 4 @SiO 2 @Au have been used in hydrodechlorination and hydration reactions, respectively. 15,16 Tsunoyama and coworkers 17 demonstrated that the catalytic activity of AuNPs is impacted by several factors, including particle size and the surface area of nanoparticles which is inversely proportional to the particle size, but directly proportional to the surface area of AuNPs. 18,19 Over the past decade, a wide variety of synthetic approaches have been developed to improve the sustainability of organic transformations.…”