1. Department of Chemical and Materials Engineering; Pontifical Catholic University of Rio de Janeiro; Rio de Janeiro Brazil
2. Department of Materials; New Materials Laboratory; Escuela Politécnica Nacional; Quito Ecuador
3. Department of Metallurgical and Materials Engineering; COPPE/UFRJ; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
4. Department of Chemistry; Clean Technology Research Institute; Dalhousie University; Halifax NS Canada