1. Department of Physics, Nizam College, Osmania University, Hyderabad- 01, Telangana, India
2. Nanomaterials and Catalysis Research Laboratory, Department of Chemistry, Nizam College, Osmania University, Hyderabad-01, Telangana, India
3. Department of Chemistry, Osmania University, Hyderabad-07, Telangana, India
4. Department of Catalysis and Fine Chemicals, CSIR-IICT, Hyderabad-07, India