1. Department of ChemistryJamal Mohamed College, Tiruchirappalli 620 020, India
2. Electropyrometallurgy Division, Central Electrochemical Research Institute, Karaikudi 630 006, India
3. Characterization and Measurement LabCouncil of Scientific and Industrial Research (CSIR), Central Electrochemical Research Institute, Karaikudi 630 006, India