Synthesis, Characterization of Nano MnO2 and its Adsorption Characteristics Over an Azo DyeBM Pradeep Kumar1, Sriram Karikkat2, R Hari Krishna3, TH Udayashankara2, KH Shivaprasad1and BM Nagabhushana3*
- *Corresponding Author:
- BM Nagabhushana
Department of Chemistry
M. S. Ramaiah Institute of Technology
Bangalore 560 054, India.
Received Date: 22/11/2013; Revised Date: 12/12/2013; Accepted Date: 19/12/2013
Nano MnO2 powder was synthesized by low temperature solution combustion method using oxalyl dihydrazide (ODH) fuel. The final product was well characterized by Powder X-ray diffraction (PXRD), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning electron microscopy (SEM) for crystallographic purity, phase formation and surface morphology respectively. PXRD results show that pure MnO2 was synthesized at 300 0C with no other impurities. SEM micrograph shows the product has highly porous structure with large voids, typical of combustion derived material. An adsorption characteristic of the porous MnO2 was studied over direct green dye (DG). The optimum dose of MnO2 for removal of 10 ppm DG azo dye was found to be 0.4 g L-1