Biosynthesis of gold nanoparticles using aqueous extract of Ricinus cummunis leaves to augment catalytic degradation of organic dyes and study of its antifungal and antibacterial activities--颗粒学报PARTICUOLOGY

Parmar, M., & Sanyal, M. (2024). Biosynthesis of gold nanoparticles using aqueous extract of Ricinus cummunis leaves to augment catalytic degradation of organic dyes and study of its antifungal and antibacterial activities. Particuology, 87, 87-98. https://doi.org/10.1016/j.partic.2023.07.018

Biosynthesis of gold nanoparticles using aqueous extract of Ricinus cummunis leaves to augment catalytic degradation of organic dyes and study of its antifungal and antibacterial activities

Mrinalini Parmar ^a *, Mallika Sanyal ^{a b}

a Department of Chemistry, Gujarat University, Ahmedabad, Gujarat 380009, India
b St. Xavier's College, Navrangpura, Ahmedabad, Gujarat 380009, India

10.1016/j.partic.2023.07.018

Volume 87, April 2024, Pages 87-98

Received 24 April 2023, Revised 28 June 2023, Accepted 24 July 2023, Available online 19 August 2023, Version of Record 28 August 2023.

E-mail: mrinalini0901@gmail.com

Highlights

• Green synthesis of gold nanoparticles using aqueous extract of Ricinus cummunis leaves.

• Reaction parameters effecting the formation of nanoparticles.

• Antifungal and antibacterial studies.

• Mechanism of organic dye degradation using biosynthesised nanoparticles.

Abstract

In this study, biosynthesis of gold nanoparticles (Au NPs) using aqueous extract of fresh leaves of Ricinus cummunis plant is reported without the use of any synthetic chemical in the reaction process. The prepared NPs are mostly spherical in shape with some particles having triangular or hexagonal structures. The average size of the particles as calculated using TEM data is 18 nm. The biosynthesised Au NPs were studied for their application in remediation of Congo Red, Methylene Blue, Reactive Red 120 and Rhodamine B dyes present in industrial effluents. The degradation of dyes was confirmed spectrophotometrically using UV–Vis Spectrophotometer. Reactive Red 120 and Congo red dyes were most effectively reduced with 88% degradation. The Au NPs were further studied for their potential as an effective antifungal agent against fungal strains namely Candida albicans and Aspergillus fumigatus and antibacterial properties against Bacillus subtilis (Gram +ve) and Pseudomonas aeruginosa (Gram −ve) bacterial strains. The MIC values being 7.8 and 15.6 (μg/mL) for Bacillus subtilis and Pseudomonas aeruginosa respectively.

Graphical abstract

Keywords

Gold nanoparticles; Photocatalysts; Dye degradation; Antifungal studies; Antibacterial studies

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