Authors
- Nilanjal Misra 1
- Virendra Kumar 2
- Swarnima Rawat 1
- Narender Kumar Goel 1
- Shubhangi A. Shelkar 1
- Lalit Varshney 2
1 Radiation Technology Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
2 Radiation Technology Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
Abstract
A facile, green radiolytic route is described for the synthesis of poly (2,3-Epoxypropylmethacrylate) (PEPMA) stabilized Gold nanoparticles (PEPMA-Au-NPs) via gamma radiolytic reduction of an aqueous solution of HAuCl4 precursor ions containing EPMA as a stabilizing/capping agent. The effect of different experimental parameters, such as precursor ions and stabilizing agent concentration, gamma radiation dose and solvent polarity on the properties of Au-NPs were studied. PEPMA-Au-NPs system was characterized by UV-visible spectroscopy, TEM and particle size analysis techniques. PEPMA-Au-NPs showed characteristic Localized Surface Plasmon Resonance (LSPR) band at ~530nm. TEM analysis confirmed the formation of spherical particles with an average size of 7.6nm±3.1nm. PEPMA-Au NPs prepared under optimized conditions were employed as an efficient catalytic system to carry out the reduction of p-nitrophenol (PNP) to p-aminophenol (PAP). The reaction was observed to follow pseudo first order kinetics and demonstrated good efficiency in carrying out the catalytic reduction reaction under optimized conditions. Copyright © 2018 VBRI Press.
Keywords
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Final amount of
catalyst (mg.mL-1)
PNP
(μM)
Apparent rate
constant k (s-1)
1.90 x10-4(1.0 μM)
4.75x10-4(2.5 μM)
9.50x10-4 (5.0 μM)
1.43x10-3 (7.5 μM)
1.90x10-3(10.0 μM)
50
50
50
50
50
5.00x10-5
2.50x10-4
8.83x10-4
1.20x10-3
1.73x10-3
Research Article 2018, 3(4), 199-205Advanced Materials Proceedings
Copyright © 2018VBRI Press 205
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