Nano-technology is being frequently used in several aspect of life. Chemical and physical methods of nanoparticle synthesis generally involve high temperature, vacuum condition and harsh/toxic chemicals that cause adverse impact on environments including humans and are costly. Hence, there is a need of alternative method to synthesize nanoparticles. Biological approach that connects nanotechnology with plant extracts, fungi, honey etc. is the possible alternative of chemical and physical methods of non-particles synthesis. Bio-tools are adapted in nano-biotechnology to promote the safer and sustainable application. This review focuses on the use of nano-catalysis and green chemistry for development of non-particles and their effective application in various biological and industrial, medical, agriculture etc.

Keywords: Nanoparticles; Green Synthesized NPs; Phytoextract;