Green Synthesis, Characterization, Biological Activities of CuO Nanoparticles and Their Photocatalytic Degradative Mechanistic Study of Methylene Blue Dye Using Mass Spectroscopy
Reshma Reshma, Hussain Shaik, K. Venkatesan, M. D. Kadeer, P. Veera Somaiah
Abstract
Abstract A facile and green route was employed to synthesize CuO NPs using a non-toxic, lemon extract (Citrus limon) as both the reducing and stabilizing agent. The synthesized NPs were characterized using UV-Vis, FTIR, TEM, SEM, EDX, and XRD, FTIR techniques. The synthesized CuO NPs were used for photocatalytic degradation of MB dye under solar irradiation. In this study, the photocatalytic degradation efficiency of CuO NPs towards the MB dye was 87.7%. The kinetics of photocatalysis of synthesized CuO nanoparticles for the degradation of MB dye follows the pseudo-first-order kinetics with a reasonable apparent rate constant, 2.5×10–2 min–1. The possible mechanism pathways and the degradation products of MB dye during the photocatalytic process were identified using Liquid chromatography-Mass spectrometry (LC-ESI-TOF-MS). The antibacterial activity of synthesized NPs was evaluated using Bacillus subtillis and Klebsiella pneumonia bacterial strains. The synthesized CuO NPs showed good antimicrobial activity.In vitro anticancer activity of synthesized CuO NPs was studied against cancer cell lines, A549 and HepG2.The results revealed that CuO NPs have a capacity of anticancer activity against A549 cells and HepG2 cells. The antioxidant activity of synthesized nanoparticles was examined using ABTS and DPPH radical.