Study on the Preparation of Silver Nanoparticle from Grape-Skin Extract and Its Antibacterial Properties
The method of preparing nano silver from agricultural waste grape skin extract was studied,and the possible effects of silver nitrate solution concentration and reaction solution pH on the synthesis of nano silver were analyzed.UV spectrophotometer,Fourier transform infrared spectroscopy analyzer,X-ray diffractometer,and transmission electron microscope were used to analyze the UV spectrum,potential functional groups involved in the reaction,and morphology of silver nanoparticles.The results indicate that the amino,amide,and carboxyl groups in grape skin extract play a crucial role in reducing silver ions in silver nitrate solution to silver nanoparticles.During the experiment,the silver nitrate solution changed from colorless to brown after the addition of grape skin extract.The UV characteristic peak of the synthesized nano silver particles was at 425 nm,with a particle size of about 5 nm.It has good antibacterial properties against Escherichia coli,Staphylococcus aureus,and Pseudomonas aeruginosa.
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