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Journal of Chemistry
Volume 2017, Article ID 3621084, 7 pages
Research Article

Application of Spent Li-Ion Batteries Cathode in Methylene Blue Dye Discoloration

DECEB, Federal University of São João del-Rei, Campus Sete Lagoas, MG-424, Km 45, 35701-970 Sete Lagoas, MG, Brazil

Correspondence should be addressed to Eric M. Garcia; moc.liamtoh@gmgmcire

Received 22 December 2016; Revised 4 March 2017; Accepted 26 March 2017; Published 30 May 2017

Academic Editor: Carlos Alberto Lberto Martínez-Huitle

Copyright © 2017 Eric M. Garcia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper aims to present the mechanism study of methylene blue (MB) discoloration using spent Li-ion battery cathode tape and hydrogen peroxide. The recycled cathode used in this work is composed of 72% of LiCoO2, 18% of carbon, and 10% of Al. The value found for surface area is 8.9 m2/g and the ZCP value occurs in pH = 2.95. Different from what is proposed in the literature, the most likely mechanism of methylene blue discoloration is the oxidation/delitiation of LiCoO2 and the reduction of H2O2 forming . Thus, in this paper, an important and promising alternative for discoloration of textile industry dyes using spent Li-ion battery cathode is presented.