Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 13 1 2017 02 01 Synthesis, Structure, Spectroscopy and Photocatalytic Studies of Nano Multi-Metal Oxide MgO∙Al2O3∙ZnO and MgO∙Al2O3∙ZnO-Curcumin Composite 69 82 24535 EN Md Abdus Subhan Department of Chemistry, Shah Jalal University of Science and Technology, Sylhet, Bangladesh Pallab Chandra Saha Department of Chemistry, Shah Jalal Un iversity of Science and Technology, Sylhet, Bangladesh Nizam Uddin Department of Chemistry, Shah Jalal Un iversity of Science and Technology, Sylhet, Bangladesh Prosenjit Sarker Square Pharmaceuticals Ltd., Bangladesh Journal Article 2016 05 25 <em>   The mixed metal nanocomposite MgO∙Al₂O₃∙ZnO has been prepared by coprecipitation method. The product was characterized by XRD. The average particle size was found to be 34.89 nm from XRD data. SEM and SEM-EDS were studied for evaluating surface morphology and elemental composition. The FTIR spectrum of prepared mixed metal nanocomposites MgO∙Al₂O₃∙ZnO and MgO∙Al₂O₃∙ZnO-curcumin were studied. The optical properties of the nanocomposites were studied by PL (Photoluminescence). The quantum efficiency (Φ) of MgO∙Al₂O₃∙ZnO and MgO∙Al₂O₃∙ZnO-curcumin was found to be 0.86 and 0.31, respectively in acetone. The photocatalytic activity of the nano composite, MgO∙Al₂O₃∙ZnO was investigated over methyl violet 6b (MV) dye under UV-Visible light irradiation. The photocatalytic activity was assessed with various parameters including variation of pH, effect of H₂O₂ and reusability. The dye degradation efficiency of nanocomposite was observed to be 48.7% and 93.42% for catalyst and catalyst with H₂O₂ at pH 9. The efficiency was 86.96% for catalyst with H₂O₂ at pH 7. </em> https://www.ijnnonline.net/article_24535_6080b4a414292cce8d1c1b197708fefb.pdf