Production of selenium nanoparticles with coffee bean extract

Nanoparticles have become one of the most studied areas today due to their superior properties and many advantages. A green synthesis method is used, which is low cost, non-toxic, environmentally friendly and does not require any chemicals in its production. In this study, the extraction of some bioactive compounds from green coffee beans was optimized by response surface method using Box-Behnken experimental design and microwave-assisted selenium nanoparticle production was carried out using the extract obtained under optimized conditions. It was determined that the produced selenium nanoparticles showed absorbance between 350-400 nm. The surface morphology and size of the nanoparticles were determined by transmission electron microscopy (TEM) and spherical nanoparticles of about 100 nm were produced. Functional groups affecting the reduction were determined by FTIR analysis. In addition, it was determined that the produced selenium nanoparticles were in amorphous (non-uniform) structure and could maintain their stability at high temperatures.