1. Department of Chemistry, State University of Paraiba, Rua Juvêncio Arruda s/n CampusUniversitário, Bodocongó - 58109-790, Campina Grande, PB, Brazil
2. Materials Engineering Department, Federal University of Campina Grande Av.Aprígio Veloso, 882 - Bodocongó - 58109-970, Campina Grande, PB, Brazil
3. Materials Science and Metallurgy Department, Pontificial Catholic University of Rio de Janeiro, Rua Marquês de São Vicente, 225 - Gávea - 22453-900 Rio de Janeiro, RJ, Brazil,