Abstract

• The present study deals with the synthesis of copper(II) oxide nanoparticles (CuO NPs) by using aqueous solution of copper(II) nitrate and leaves extracts of Tamarindus indica L. (Ma-Gyi). Characterizations of the CuO NPs were made by Thermogravimetric-Differential Thermal Analysis (TG-DTA), X-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FT IR), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). CuO nanoparticles were indexed as monoclinic with average crystallite size of 19.9 nm. The presence of characteristic vibration of Cu-O in the range of 430-606 cm-1 was confirmed by FT IR analysis. Photocatalytic degradation of alizarin and malachite green dyes by CuO NPs under sunlight was conducted. Highest degradation percentages of alizarin and malachite green were attained at 03 g dosage of CuO NPs for 120 min Treatment of wastewater from textile dye factory with the CuO NPs was performed and 99.13 % of the colour was removed after 8 days.