Synthesis of CuO/ZnO Nanocomposites and Their Application in Photodegradation of Toxic Textile Dye

By Abdullah Al Sakib, S. Masum, J. Hoinkis, R. Islam, Md. Ashraful Islam Molla. Journal of Composites Science, 2019

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CuO/ZnO composites are synthesized using a simple mechanochemical combustion method. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier transform infrared (FTIR) are used to characterize the prepared oxides. X-ray diffraction reveals that the prepared CuO/ZnO exhibit a wurtzite ZnO crystal structure and the composites are composed of CuO and ZnO. The strong peaks of the Cu, Zn, and O elements are exhibited in the EDX spectrum. The FTIR spectra appear at around 3385 cm−1 and 1637 cm−1, caused by O–H stretching, and 400 cm−1 to 590 cm−1, ascribable to Zn–O stretching. The photocatalytic performances of CuO/ZnO nanocomposites are investigated for the degradation of methylene blue (MB) aqueous solution in direct solar irradiation. The degradation value of MB with 5 wt % CuO/ZnO is measured to be 98%, after 2 h of solar irradiation. The reactive •O2− and •OH radicals play important roles in the photodegradation of MB. Mineralization of MB is around 91% under sunlight irradiation within 7 h. The photodegradation treatment for the textile wastewater using sunlight is an easy technique—simply handled, and economical. Therefore, the solar photodegradation technique may be a very effective method for the treatment of wastewater instead of photodegradation with the artificial and expensive Hg-Xe lamp.

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/aaa10520c743a8f9780204ecd2f27a78afa7efca

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Citations in the corpus

• Diversity of Synthetic Dyes from Textile Industries, Discharge Impacts and Treatment Methods (2021, background): “Thes factors l ad to sever ecological impacts on the aquatic system such as the inhibiti n of photo y thesis in aqua ic plants, low biodegradability y aerobic microorganisms and harmful effects on the food chain [57,58].”