Journal of Chemistry and Applications

Research Article

Sustainable Fabrication of Gold Nanoparticles Using Catunaregam spinosa Fruit Extract for Antioxidant Applications

Banu R1* and Mohan KC2

1Department of Chemistry, Dr. BRR GDC(A) Jadcherla, Mahabubnagar Telangana, India.
2Department of Chemistry, MALD Government Degree College Gadwal Telangana, India.
*Address for Correspondence:Ruqya Banu, Department of Chemistry, Dr. BRR GDC(A) Jadcherla, Mahabubnagar Telangana, India. EMail Id:ruqyabrr@gmail.com
Submission: 20 June, 2026 Accepted: 28 July, 2026 Published: 30 July, 2026
Copyright: © 2026 Banu R, et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Keywords: Gold Nanoparticles; Catunaregam Spinosa; Green Synthesis; Antioxidant Activity; DPPH Assay.

Abstract

The green synthesis of gold nanoparticles (AuNPs) has emerged as a promising and sustainable approach in nanotechnology owing to its environmental friendliness, cost-effectiveness, and simplicity. In the present study, a rapid and eco-friendly method was developed for the synthesis of AuNPs using Catunaregam spinosa fruit extract as a natural reducing, capping, and stabilizing agent. The biosynthesized AuNPs exhibited an average particle size of 10 ± 2 nm. Comprehensive characterization of the synthesized nanoparticles was carried out using UV–Visible spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The formation of AuNPs was confirmed by the characteristic surface plasmon resonance (SPR) absorption band in the UV–Visible spectrum, while XRD analysis revealed their crystalline nature with a face-centered cubic (FCC) structure. TEM analysis demonstrated that the nanoparticles were predominantly spherical and well dispersed. The antioxidant potential of the synthesized AuNPs was evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay, which demonstrated significant concentrationdependent antioxidant activity. These findings indicate that Catunaregam spinosa fruit extract-mediated AuNPs represent an environmentally sustainable nanomaterial with promising potential for biomedical and antioxidant applications.