Nanotechnology involves material with nanoscale dimension that range from 0.1 to 100 nm, to make devices, systems and materials with essentially new characteristics and applications due to their large surface area to volume ratio. Zinc oxide nanoparticles (ZnO NPs) are widely known due to its wide band gap and high exciton binding energy. ZnO NPs are normally synthesized by chemical methods which involve the use of hazardous and expensive chemicals, resulting in toxic and environmentally hazardous by-products. Green synthesis of ZnO NPs by plants extract is non-toxic and economic. Therefore, this paper aims to explore the potential of plants extract in the green synthesis of ZnO NPs. Moreover, the capability of Coriandrum sativum leaf extracts to produce ZnO NPs in degrading dyes in textile wastewater is also discussed.