Recycling of Silver Nanoparticles from Scarp Electronic Components by Chemical Reduction

In the present project, the use of scarp electronic components in the synthesis of silver nanoparticles was investigated. For this purpose, crystalline oscillators were used as a consumable piece to synthesize these particles. The results showed that by optimizing the time and temperature of dissolution process with nitric acid solution up to 90% silver can be separated from these components. The temperature of 60°C and the time of one hour were determined as the optimum conditions of this section. Then, the synthesis of silver nanoparticles was investigated using silver nitrate solution. The results showed that the initial silver nitrate concentration had a significant effect on the final product quality, so that at 1 mollar concentration, the best conditions were provided for the synthesis of silver nanoparticles with suitable properties. Phase’s evaluation illustrated that the main phase of the synthesized silver particles had an FCC structure and no unwanted phase was observed. UV analysis of the synthesized powder showed that the core peak of the silver nanoparticles appeared in the wavelength range of 400 to 450 nm. The DLS results showed that the concentration of 1 mollar was the optimum concentration of silver nitrate in the present study. The AFM and TEM observation show that the silver particles synthesized with a particle size less that 20 nanometer, spherical morphology and uniform particle size distribution.