Materials based on aluminum and iron oxides obtained by the hydrothermal method

摘要

The influence of the relation [Al3+] : [Fe3+] on the phase composition and morphology of the products obtained by the hydrothermal method using solutions of salts of metals and combined sols of aluminum and iron (3+) hydroxides has been studied. The hydrothermal treatment of solutions of salts of aluminum and iron (3+) results in the formation of hematite of a cylindrical or capsular shape, while by the treatment of sols, depending on the relation [Al3+] : [Fe3+], it is possible to obtain particles of hematite with an ellipsoidal shape or bundles of amorphous AlOOH.