Synthesis and Characterization of Mn₂O₃/Cuo Nanocomposite Using A Spirulina Biological Model for Dye Degradation in Polluted Water Under Visible Light

Abstract

The release of pollutants into the environment has increased significantly as a result of the widespread use of paints in various industries. The reactive black 5 (RB-5) is one of the most popular azo-based dyes, it's also one of the most commonly used synthetic dyes in the textile industry because of its azo group (N=N). Since this chemical is toxic and has a severe impact on the environment, it's essential to eliminate it from the environment. The objective of this research was to create and characterize Mn2O3-CuO nanocomposites using extracts from Spirulina, then utilize them to degrade the color of the dye RB5 in polluted water. Mn2O3 nanoparticles were created by the coprecipitation method, then copper oxide was created using Spirulina's extracts in conjunction with Mn2O3 nanoparticles. The resultant Mn2O3-CuO nanocomposites were then studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and energy dispersive X-ray analysis (EDX). Under the most beneficial conditions, the pH was 5, the amount of Mn2O3-CuO was 40 mg, and 120 minutes of lightning had a greater than 90% removal of the color from the water sample. Additionally, the composed nanomaterial could be utilized for at least four cycles without a significant loss of its photocatalytic capabilities.

Keywords:

Reactive Black 5 (RB-5), Mn2O3-CuO nanocomposite, Photocatalyst

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