Antibacterial and catalytic activities of biosynthesized silver nanoparticles prepared by using an aqueous extract of green coffee bean as a reducing agent

作者：Wang, Mengmeng; Zhang, Wenjing; Zheng, Xuesong^*; Zhu, Peizhi^*

来源：RSC Advances, 2017, 7(20): 12144-12149.

DOI：10.1039/c6ra27706c

• FACILE SYNTHESIS
• IONS
• MECHANISM
• COMPLEX
• OXIDE

Spherical biogenic silver nanoparticles (AgNPs) were synthesized using aqueous green coffee bean extract as a reducing agent. The green coffee bean extract was used for the time to reduce silver ions via a one-step, green, and rapid approach. The prepared AgNPs were characterized via transmission electron microscopy (TEM), atomic force microscopy (AFM), and UV-visible spectroscopy. Dynamic light scattering (DLS) was performed to measure the particle size. These AgNPs exhibit strong antibacterial activity against both Gram-negative and Gram-positive bacteria and the minimum inhibitory concentration (MIC) of AgNPs for Escherichia coli and Staphylococcus aureus are 0.05 mu mol L-1 and 0.1 mu mol L-1, respectively. Furthermore, AgNPs could serve as an effective catalyst for the reduction of 4-nitrophenol to 4-aminophenol in the presence of NaBH4.

• 出版日期2017
• 单位上海应用技术大学; 扬州大学