Green synthesis of ZnO nanoparticles using polyphenol extracts from pepper waste (Capsicum annuum)

The nanoparticles (NPs) synthesis poses an environmental problem: the formation of other toxic substances. An eco-friendlier alternative method based on use polyphenolic extracts is gaining interest due to their potential reduce metal salts for NPs without products. Thus, main objective this work was obtain zinc oxide (ZnO) from pepper rich in polyphenols. To end, polyphenol extraction process set-up using a response surface analysis different parameters involved (i.e. temperature, time, amount and solvent used, type part used -whole fruit, pulp or waste-) terms total content (TPC) antioxidant activity extracts. optimal were synthesize ZnO by colloidal precipitation, which further characterized through X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy tests. In addition, green compared with those obtained chemical reagents. synthesized purer (100 88% NPs) smaller (24–43 35–70 nm NPs). results show great synthesis, being contribution sustainability.