Novel biogenic silver and gold nanoparticles for multifunctional applications: Green synthesis, catalytic and antibacterial activity, and colorimetric detection of Fe(III) ions

• Published in: Chemosphere (Oxford) Vol. 287; p. 132271
• Main Authors: Nguyen, Thi Hong Anh, Nguyen, Van-Cuong, Phan, Thi Nhu Huynh, Le, Van Thuan, Vasseghian, Yasser, Trubitsyn, Mikhail Alexandrovich, Nguyen, Anh-Tien, Chau, Tan Phat, Doan, Van-Dat
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-01-2022
• Subjects: 4-Nitrophenol reduction; Antibacterial activity; Colorimetric detection; Ganoderma lucidum; Green synthesis; Metallic nanoparticles; Antibacterial activity; Ganoderma lucidum; Green synthesis; 4-Nitrophenol reduction; Metallic nanoparticles; Colorimetric detection
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2021.132271

In this study, novel biogenic silver (AgNPs) and gold nanoparticles (AuNPs) were developed using a green approach with Ganoderma lucidum (GL) extract. The optimization of synthesis conditions for the best outcomes was conducted. The prepared materials were characterized and their applicability in catalysis, antibacterial and chemical sensing was comprehensively evaluated. The GL-AgNPs crystals were formed in a spherical shape with an average diameter of 50 nm, while GL-AuNPs exhibited multi-shaped structures with sizes ranging from 15 to 40 nm. As a catalyst, the synthesized nanoparticles showed excellent catalytic activity (>98% in 9 min) and reusability (>95% after five recycles) in converting 4-nitrophenol to 4-aminophenol. As an antimicrobial agent, GL-AuNPs were low effective in inhibiting the growth of bacteria, while GL-AgNPs expressed strong antibacterial activity against all the tested strains. The highest growth inhibition activity of GL-AgNPs was observed against B. subtilis (14.58 ± 0.35 mm), followed by B. cereus (13.8 ± 0.52 mm), P. aeruginosa (12.38 ± 0.64 mm), E. coli (11.3 ± 0.72 mm), and S. aureus (10.41 ± 0.31 mm). Besides, GL-AgNPs also demonstrated high selectivity and sensitivity in the colorimetric detection of Fe3+ in aqueous solution with a detection limit of 1.85 nM. Due to the suitable thickness of the protective organic layer and the appropriate particle size, GL-AgNPs validated the triple role as a high-performance catalyst, antimicrobial agent, and nanosensor for environmental monitoring and remediation.
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•Biogenic AgNPs and AuNPs were prepared using Ganoderma lucidum extract.•Both MNPs possessed excellent catalytic activity for the reduction of 4-nitrophenol.•AgNPs showed strong antibacterial activity against several bacterial strains.•The AgNPs-based probe can accurately determine Fe3+ in water with LOD of 1.85 nM.