NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2016, 7 (4), P. 657–661
Electro chemical and photo catalytic studies of MnO2 nanoparticle from waste dry cell batteries
M. Mylarappa – Research Centre, Department of Chemistry, AMC Engineering College; Department of Studies and Research in Chemistry, Tumkur University, Tumkur-572103, Karnataka, India
V. Venkata Lakshmi – Research Centre, Department of Chemistry, AMC Engineering College, Bengaluru-560083, Karnataka, India; laxmimurthy@rediffmail.com
K. R. Vishnu Mahesh – Department of Chemistry, Dayananda Sagar College of Engineering, Bengaluru-560083, Karnataka, India; vishnumaheshkr@gmail.com
H. P. Nagaswarupa – Research Centre, Department of Science, East West Institute of Technology, Bengaluru-560091, Karnataka, India
S. C. Prashantha – Research Centre, Department of Science, East West Institute of Technology, Bengaluru-560091, Karnataka, India
D. M. K. Siddeswara – Research Centre, Department of Science, East West Institute of Technology, Bengaluru-560091, Karnataka, India
N. Raghavendra – CMRTU, RV College of Engineering, Bengaluru-560059, Karnataka, India
The objective of the existing research was essentially focused on recovery of MnO2 nanoparticles from consumed dry cells by employing adapted hydrometallurgical process. Experimental tests for the recovery of MnO2 present in the dry cell batteries have been carried out by an acidic reductive leachant, namely oxalic acid. The elemental compositions of the recovered metals from dry cells were confirmed by Energy Dispersive X-ray analysis (EDAX). Surface morphology of the recovered metals was examined using Scanning Electron Microscopy (SEM). Phase composition of the recovered metals from dry cell batteries were confirmed from X-ray Diffract meter (XRD). Cyclic Voltammetry (CV) studies were carried out to clarify the reversibility of the reactions. The obtained MnO2 catalyst was applied for the degradation of different nonvolatile dye compounds such as Indigo carmine (IC) and Rhodamine B (RB). The performance of MnO2 shows fast degradation of dyes of high concentration.
Keywords: Dry cell batteries, recovery, Zn, Mn, electrochemical, catalytic activity.
PACS 82.47.-a
DOI 10.17586/2220-8054-2016-7-4-657-661
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