Gold nanoparticles decorated on a graphene-periodic mesoporous silica sandwich nanocomposite as a highly efficient and recyclable heterogeneous catalyst forcatalytic applications

S.K. Movahed, M. Shariatipour, M. Dabiri* (2015) RSC Advances 5 (42), 33423-33431.

https://doi.org/10.1039/C5RA00062A

Abstract

Ultra-small Au nanoparticles (Au NPs) were immobilized on HS-functionalized sandwich-like periodic mesoporous silica (PMS) coated graphene (G) to form the novel nanocomposite catalyst Au NPs@HS-G-PMS. The synthesized Au NPs@HS-G-PMS nanocatalyst exhibited excellent catalytic activity in three kinds of organic reactions. The reduction of 4-nitrophenol by sodium borohydride, the Suzuki–Miyaura cross coupling reaction of aryl halides with phenyl boronic acid and the three component coupling reaction of aldehyde, alkyne, and secondary amine (A³-coupling) in water were all successfully accomplished. Most importantly, the catalyst could be used repetitively more than six times without significant deactivation.