Green synthesis of NiO nanoparticles using Green Tea extract

In recent years, nanoparticles are synthesized using plant extract. Plant extract has been used an reducing and capping agent for the synthesis of nanoparticles with could be advantageous over photochemical reduction, electrochemical reduction methods[1-2]. Present research work focoused on to synthesis of NiO nanoparticles from leave extract of Green Tea plant using Green synthesis method. To synthesis the NiO nanoparticles dissolve 7g of Ni(NO3)2.6H2O in 50 ml of distilled water. Added leaves extract under constant stirring and achieve PH of solution became 7. The mixture was subjected to stirring for 48h on heater continuously. Afterwards in ultrasonic radiation for 30 min. Then the solution was sealed in a Teflon-lined autoclave and maintained at 80 ̊C for 24h, after cooling to room temperature and washed with distilled water and absolute ethanol. Next dried at 60 ̊C for overnight and calcined at 700 ̊C for 3h. The obtained NiO nanoparticles have been characterized by XRD, FTIR , SEM. The appearance of sharp band at 1457.62 cm -1 in the FTIR spectrum confirms the synthesis of NiO (Fig.1). The XRD pattern showed that the product consist of NiO with no characteristic peak of other impurities (Fig.2). SEM image reveals the uniformity of the average particles size and shape of the obtained NiO nanoparticles (Fig.3). The results indicate that NiO nanoparticles are in spherical shape. We can observe that the particles are highly agglometered and they are essentially a cluster of nanoparticles