Shape-selective synthesis of gold nanoparticles and their catalytic activity towards reduction of p -nitroaniline
| Autor: | Shyam Sunder R. Gupta, Bhalchandra M. Bhanage, Mannepalli Lakshmi Kantam |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Aqueous solution
Materials science Polyvinylpyrrolidone Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Catalysis Sodium borohydride chemistry.chemical_compound Chemical state chemistry X-ray photoelectron spectroscopy Colloidal gold medicine General Materials Science Physical and Theoretical Chemistry 0210 nano-technology Nuclear chemistry medicine.drug |
| Zdroj: | Nano-Structures & Nano-Objects. 14:125-130 |
| ISSN: | 2352-507X |
| DOI: | 10.1016/j.nanoso.2018.01.017 |
| Popis: | Microwave assisted shape-selective synthesis of gold nanoparticles has been achieved in a short reaction time of 6 min. Shape of the gold nanoparticles has been found to be tuneable among truncated cube, cube, tetrahedral and octahedral by changing the concentration of aqueous NaOH into the reaction mixture containing HAuCl4, N,N-dimethylformamide (DMF) and polyvinylpyrrolidone (PVP) under microwave irradiation. The preferential adsorption of sodium ions on gold surface during crystal growth controls the shape of the nanoparticles. The chemical state, crystallographic structure, elemental composition and morphology of the as-prepared gold nanoparticles were analyzed using respective XPS, powder XRD, EDS and FEG-SEM analytical techniques. Catalytic performance and recyclability of the as-prepared gold nanoparticles were examined towards the reduction of p-nitroaniline into p-phenylenediamine using sodium borohydride and continuous monitoring the reaction progress using UV-Visible spectrophotometer under ambient conditions. |
| Databáze: | OpenAIRE |
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