Synthesis of Metal oxides and Nano composites for Photocatalytic Degradation of Waste water Pollutants

Abstract

In this study, different Metal Oxide nanocomposites were synthesized using plant based reducing agents for different environmental applications. Simple, cost-effective processes like combustion, precipitation, and sol-gel were used to develop the nanomaterials. Their versatile application in the field of waste removal, dye degradation, electrochemical sensing, and antimicrobial activity has been discussed. newlineMgO, ZrO2, ZrO2-ZnO, Er-CuO, and Gd-CuO, are among the unique nanostructured materials studied in this work. These were used in a variety of environmental applications as a key component. Different studies have indicated noticeable variations in electrochemical behaviour, performance, and stability, which have been recorded. newlineEco-friendly synthesis of MgO nanoparticles with different fuel ratios named MGN1, MGN2, MGN3, and MGN4 using Phyllanthus emblica aqueous fruit juice, also known as Indian gooseberry. Photocatalytic degradation of Evans blue (EB) dye was investigated using UV light irradiation with the results showing 90% removal of the dye from the wastewater. Further, using the agar well diffusion technique, the same compound is tested for antibacterial activity against several pathogenic bacteria. newlineTetragonal Zirconium oxide (ZrO2) nanoparticles (NPs) were produced by the solution combustion method employing raw extract of Basella alba as a fuel and Zirconium (IV) oxynitrate hydrate as the metal precursor at 600and#8304;C. ZrO2 NPs have optimal photocatalytic activity when it comes to degrading the harmful dye Evans blue. One of the independent factors utilised in the investigation was contact time, along with initial dye concentration and pH. The interdependencies of the various variables were optimised and described using the Response Surface Model (RSM). The Box-Behnken design was used to test the technique (BBD). Additionally, Gram-negative Klebsiella pneumoniae and Gram-positive Bacillus subtilis are also effectively inhibited by ZrO2 nanoparticles. newlineWith the aid of raw Basella alba juice and a solution combu