Synthesis And Characterization Of Mgo Based Nanocomposites For Potential Applications

Abstract

The green-synthesized MgO nanostructures are commonly used as adsorbents and effective photocatalysts for the degradation of organic dyes in wastewater. MgO nanoparticles were produced through a sustainable neem leaf-assisted green method and traditional chemical synthesis. Material characterization using XRD, FTIR, UV Vis, and FESEM techniques was undertaken. The maximum adsorption capacity of MgOatCM and MgOatGM for CR and BG dye removal was revealed at an optimal pH range of 5 6. The maximal adsorption capacities were determined as 427.73 mg/g (MgOatCM) and 420.34 mg/g (MgOatGM) for CR, and 294 mg/g (MgOatCM)and 275.4 mg/g (MgOatGM) for BG. The other two green extracts are sweet lemon (Citrus Limetta) (MgOatSL) peel extract and rosewood leaves (Dalbergia Sissoo) (MgOatDS) leaves extract. Both magnesium oxide nanoparticles are then employed to evaluate their effectiveness in removing the single and bicomponent solutions of CR and BG dye. For the synthesis of nanocomposites of magnesium oxide, various carbon routes are studied individually for wastewater treatment. Bisphenol A (BPA) in water is removed by employing activated carbon (AC), carbon nanotubes (CN), and graphene oxide (GO) as effective adsorbents. The maximum Langmuir adsorption capacity of AC, CN, and GO was 158.7 mg/g, 137mg/g, and 63.3 mg/g, respectively. Nanocomposites of MgO and AC are successfully synthesized by chemical methods (MgOatCM/AC) and green methods by using different green extracts (MgOatNL/AC, MgOatDS/AC, MgOatSL/AC). The material shows good photocatalytic performance for MB dye in a single-component system and removes CR, BG, and MB dye. The material is successfully used till the 5th cycle. The removal of MB dye is MgOatDS/AC, MgOatDS/AC, 47 % to 9 % for MgOatSL/AC, and 56 % to 16 % for MgOatDS/AC from the 1st to the 5th cycle. In this study, MgO is successfully applicable for the removal of CR, BG, and MB dyes. The resulting nanocomposites of MgO and AC are applicable for the removal of MB dye in single and multi-component systems of dye.