Cr3+ Doped Al2O3 obtained by non-hydrolytic sol-gel methodology - Caiut, José Maurício Almeida; Floch, Nolwen; Messaddeq, Younés; Lima, Omar José de; Rocha, Lucas A.; Ciuff, Katia J.; Nassar, Eduardo José; Friedermann, Geraldo Roberto; Ribeiro, Sidney José Lima (Journal of the Brazilian Chemical Society, 2019)