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- Title
Biosynthesis of Silver and Gold Nanoparticles Using Aqueous Extract of Codonopsis pilosula Roots for Antibacterial and Catalytic Applications.
- Authors
Doan, Van-Dat; Huynh, Bao-An; Nguyen, Thanh-Danh; Cao, Xuan-Thang; Nguyen, Van-Cuong; Nguyen, Thi Lan-Huong; Nguyen, Hoai Thuong; Le, Van Thuan
- Abstract
In this study, biogenic silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) were synthesized by a green approach using an aqueous extract from Codonopsis pilosula (CP) roots as a reducing and stabilizing agent. The formation of CP-AgNPs and CP-AuNPs was confirmed and optimized by UV-Vis spectroscopy. The CP-AgNPs and CP-AuNPs obtained under optimum conditions of metal ion concentration, reaction temperature, and reaction time were characterized by high-resolution transition electron microscopy (HR-TEM), selected area electron diffraction (SAED) analysis, field-emission scan electron microscopy (FE-SEM), powder X-ray diffraction (XRD) analysis, Fourier transform infrared (FTIR) spectroscopy, dispersive X-ray spectroscopy (EDX), and dynamic light scattering (DLS) method. It has been found that the biosynthesized CP-AgNPs and CP-AuNPs were formed in spherical shape with an average size of 10 ± 2.5 nm and 20 ± 3.2 nm , respectively. The biosynthesized metallic nanoparticles exhibited selective bacterial activity against three bacterial strains including two Gram-positive bacteria of Bacillus subtilis and Staphylococcus aureus and one Gram-negative bacteria of Escherichia coli. Meanwhile, there was no antibacterial activity detected toward Gram-negative Salmonella enteritidis. CP-AgNPs and CP-AuNPs also manifested an excellent catalytic performance in the reduction of 1,4-dinitrobenzene, 2-nitrophenol, 3-nitrophenol, and 4-nitrophenol.
- Subjects
GOLD nanoparticles; SILVER nanoparticles; BACILLUS (Bacteria); GRAM-negative bacteria; ELECTRON diffraction; GRAM-positive bacteria
- Publication
Journal of Nanomaterials, 2020, p1
- ISSN
1687-4110
- Publication type
Article
- DOI
10.1155/2020/8492016