Affiliation: | a Department of General Chemistry, Faculty of Chemistry, University of Havana, Zapata and G, Havana City 10400, Cuba b Sugar Cane-Cellulose Research Center, Cuba-9, Quivicán, Cuba c Department of Inorganic Chemistry, Faculty of Chemistry, University of Havana, Zapata and G, Havana City 10400, Cuba d Department of Inorganic Chemistry-1, Complutense University of Madrid, Madrid 28040, Spain e Chemical Engineering Department, Complutense University of Madrid, Madrid 28040, Spain f Electron Microscopy Center, Complutense University of Madrid, Madrid 28040, Spain |