Shape-selective synthesis of gold nanoparticles and their catalytic activity towards reduction of p-nitroaniline
作者： Shyam Sunder R Gupta , Mannepalli Lakshmi Kantam , Bhalchandra M Bhanage , None
DOI: 10.1016/J.NANOSO.2018.01.017
关键词: Materials science 、 Catalysis 、 Aqueous solution 、 X-ray photoelectron spectroscopy 、 Colloidal gold 、 Nanoparticle 、 Polyvinylpyrrolidone 、 Chemical state 、 Sodium borohydride 、 Nuclear chemistry
摘要: Abstract Microwave assisted shape-selective synthesis of gold nanoparticles has been achieved in a short reaction time 6 min. Shape the found to be tuneable among truncated cube, tetrahedral and octahedral by changing concentration aqueous NaOH into mixture containing HAuCl4, N,N-dimethylformamide (DMF) polyvinylpyrrolidone (PVP) under microwave irradiation. The preferential adsorption sodium ions on surface during crystal growth controls shape nanoparticles. chemical state, crystallographic structure, elemental composition morphology as-prepared were analyzed using respective XPS, powder XRD, EDS FEG-SEM analytical techniques. Catalytic performance recyclability examined towards reduction p-nitroaniline p-phenylenediamine borohydride continuous monitoring progress UV-Visible spectrophotometer ambient conditions.
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