COPPER OXIDE NANOPARTICLES SYNTHESIS AND APPLICATIONS

Abstract

In this work, the CuO nanoparticles were effectively synthesized by the conventional hydrothermal method at different temperatures and by using different precursors. A strong base was used for the precipitation of nanoparticles resulting in no templating agent being needed for the process to occur. Three different samples were prepared using copper chloride and copper nitrate as precursors at 150 °C and 180 °C Different characterization. techniques were used to examine which sample is best suited for gas sensing applications Crystallography and morphological analysis suggested that sample prepared at 150 °C using copper nitrate as precursor shows good sensitivity compared to other samples Further all other characterizations are performed for this sample X-ray diffraction pattern confirms nanoparticles have a crystallite size of 44 nm with a monoclinic phase of CuO Highly dense and uniformly distributed particles with lower particle size can be seen by FESEM images Bond vibration frequencies were used to detect the presence of Cu-O bond in the sample using FTIR spectroscopy Compositional analysis was done with EDX spectroscopy. The photoluminescence (PL) analysis was performed and a peak maximum was observed at 417 nm might be due to the presence of defect states Sensitivity analysis of acetone depicts CuO has a low response and recovery time and is highly sensitive to acetone gas. Thus, a low-cost and efficient volatile gas sensor with a sustainable approach is proposed.