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4707618 
Journal Article 
Gold nanoparticles supported on nanoscale amine-functionalized MIL-101(Cr) as a highly active catalyst for epoxidation of styrene 
Saikia, M; Kaichev, V; Saikia, L 
2016 
1 
RSC Advances
EISSN: 2046-2069 
6 
108 
106856-106865 
English 
WOS:000389330700093 
In this study, well dispersed gold nanoparticles (Au Nps) were embedded on an amine-functionalized nanoscale metal-organic framework MIL-101(Cr) via a simple solution approach. The resulting Au/NH2-MIL- 101(Cr) exhibited a high isoelectric point (IEP) value with Bronsted basic sites that played an important role in determining the size and dispersion of Au Nps onto its matrix. In addition, the uniform nanomorphology of the catalyst provides the advantage of its good dispersion in aqueous media. The synthesized Au/NH2-MIL-101(Cr) catalyst was successfully characterized by different analytical techniques like powder X-ray diffraction, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, Brunauer-Emmett-Teller (BET) surface area analysis, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), zeta potential analysis and atomic absorption spectroscopy (AAS). The catalytic activity of the synthesized material was explored for the epoxidation of styrene using tert-butyl hydroperoxide as oxidant. The catalyst could easily be recovered and recycled up to the fourth catalytic cycle without any significant change in its catalytic activity.