Antioxidant activity of phytosynthesized biomatrix-loaded noble metallic nanoparticles

Preeti Dauthal; Mausumi Mukhopadhyay

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Antioxidant activity of phytosynthesized biomatrix-loaded noble metallic nanoparticles

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Antioxidant activity of phytosynthesized biomatrix-loaded noble metallic nanoparticles
- Chinese Journal of Chemical Engineering Vol. 26, Issue 5, Pages: 1200-1208(2018)
- Affiliations：
  
  2 Department of Chemical Engineering, Marwadi University, Gauridad, Rajkot 360003, Gujarat,India
- Author bio：
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- DOI：
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- Published：2018
- Accepted：
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Preeti Dauthal, Mausumi Mukhopadhyay. Antioxidant activity of phytosynthesized biomatrix-loaded noble metallic nanoparticles[J]. Chin.J.Chem.Eng., 2018, 26(5): 1200-1208.
DOI：

Preeti Dauthal, Mausumi Mukhopadhyay. Antioxidant activity of phytosynthesized biomatrix-loaded noble metallic nanoparticles[J]. Chin.J.Chem.Eng., 2018, 26(5): 1200-1208. DOI：

摘要

Abstract

Biofabrication of noble monometallic platinum nanoparticles (Pt-NPs) and bimetallic gold-silver nanoparticles (AuAg-NPs) using aqueous extract of Delonix regia is presented here. Antioxidant activity of biomatrix-loaded metallic nanoparticles is estimated for scavenging of two model radicals i.e.

2'-Azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt and 1

1'-Diphenyl-2-picrylhydrazyl. Broad spectral continuum spanning from visible to ultra-violet region (Pt-NPs:30 min) and broad high intensity absorption peak around at 500 nm (AuAg-NPs:10 min) in two different UV-Visible spectra confirmed the biofabrication. Nanoparticles fabricated with distorted spherical shape and crystalline face-centred-cubic geometry. Strong signal around at 2.10 keV (pure-phase platinum) and typical X-ray peaks observed at 2.20 and 3 keV suggested

co-existence and alloying interaction of Au and Ag in AuAg-NPs. ζ potential (-15.2 mV:Pt-NPs and -13.9 mV:AuAg-NPs) values suggested surface adsorption of polyphenolic compounds to provide stability. Nanoparticles exhibited pronounced antioxidant activity against free radicals through their electron/hydrogen transfer ability.

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