纳米钛酸亚铁的制备及刚果红吸附性能 *.

In this paper, nano-FeTiO3 powders with different Ferro titanate molar ratios were prepared by sintering in a reduction atmosphere. The samples were characterized by XRD, XI'S, BET, Zeta potentiometer and VSM. The adsorption of Congo red with different Ferrotitanate molar ratios was studied. According to the study, when FeTiO3 molar ratio was 1 : in the reduction atmosphere, the sample was pure FeTiO3 phase. When FeTiO3 ion ratio was 0.25 : 1 and 0.5 : 1, the sample phase was composed of FeTiO3 and titanium oxide. When FeTiO3, ratio was increased to 2: 1, a small amount of Fe3+C 0.1 and Fe3C were also found in the sample. In the sample, Fe coexisted in Fee2+ and Fe3+ forms, while titanium coexisted in Ti3+ and Ti1+ forms with oxygen vacancy. The dye adsorption performance study showed that the samples with a molar ratio of 0.5 : 1 had the best adsorption performance due to the large specific surface area and Zeta potential value, and the maximum equilibrium adsorption capacity was 128.7 mg/g. The adsorption process conformed to pseudo-second-order model. At the same time, the magnetic test shows that the sample had certain magnetism, so the dye could be re covered and reused by external magnetic field after adsorption. [ABSTRACT FROM AUTHOR]