GREEN SYNTHESIS OF COPPER NANOPARTICLES FROM AN EXTRACT OF CINNAMON BARK: SPECTROSCOPIC CHARACTERIZATION, OPTICAL PROPERTIES, ANTIMICROBIAL, AND ANTIOXIDANT ACTIVITIES

Abstract

Nanobiotechnology is increasing at a very fast rate due to its various industrial applications in the textile, biomedical, food, pharmaceutical, and paint industries. The green synthesis of copper nanoparticles using an aqueous extract of cinnamon zeylanicum has been documented in our present research work. The green synthesis of Cu NPs is a very simple, fast, efficient, eco-friendly, and cost-effective method. In this work, we use an aqueous environment for the green synthesis of copper nanoparticle(Cu NPs). The aqueous environment plays a very important role in decreasing reaction time, reducing the minimum possibilities of side reactions, and proper conversion of precursors into good quality CuNPs in very less time. The existence of flavonoids, tannins, glycosides, and alkaloids was confirmed by the phytochemical analysis of the plant extract, and the presence of these chemicals can be used as reducing, stabilizing, and capping agents. The Cu NPs were characterized by structural, vibrational, and electronic spectroscopic techniques. Powdered X-ray diffraction studies confirm the formation of well-defined equispaced crystalline CUNPs. The average particle and crystalline size of CuNPs were found to be 66.16 ±1 nm and 77.54±1 nm respectively. The Surface plasmon resonance peaks were found at 233.67 and 252.2 nm, measured using UV-Visible spectroscopy, and the calculated band gap was found to be 3.5 e V at 288nm, indicating the semiconductor behavior of the CZ-CUNPs. The effective results of pharmacological activities of CuNPs due to the presence of flavonoids, tannins, glycosides, and alkaloids in the CZ bark extract. The green synthesis of CZ-CUNPs from an aqueous extract of cinnamon zeylanicum bark in the proper stoichiometric ratio is an excellent method for synthesizing highly effective bioactive agents which can be considered good drug candidates for various biomedical applications in the future for mankind.