Preparation and Performance Characterization of Silver Nanoparticles of Perilla Seed Shell Extract

In order to further improve the utilization value of Perilla resources, this study used Perilla seed shell extract (PSHE) as raw material, through single factor experiments, the effects of silver nitrate concentration, extract concentration, ultrasonic power, ultrasonic temperature and ultrasonic time on the silver ion reduction rate of Perilla seed shell extract silver nanoparticles (PSHE@AgNPs) were investigated, response surface methodology (RSM) was used to optimize the ultrasonic-assisted preparation of PSHE@AgNPs, the structure and properties of PSHE@AgNPs were characterized by X-ray diffraction, fourier transform infrared spectroscopy, thermogravimetric analysis and transmission electron microscope. The results showed that the optimal PSHE@AgNPs preparation process involved a silver nitrate concentration 15 mmol/L, extract concentration 0.4 g/mL, ultrasonic power 480 W, ultrasonic temperature 80 ℃, and ultrasonic time 7 hours. Under these conditions, the silver ion reduction rate of PSHE@AgNPs reached