Study on preparation and properties of zinc ferrite and titanium dioxide

Abstract

In this paper, sulfuric acid leaching high iron zinc calcine was used to prepare and purify zinc ferrite, high temperature roasting method was used to prepare synthetic zinc ferrite, and sol-gel method was used to prepare TiO2. The properties of the prepared samples ware characterized by XRD, FT-IR, BET, SEM and other methods. The results show that the synthetic zinc ferrite is pure zinc ferrite, and the purified zinc ferrite contains impurities PbSO4. The TiO2 crystal form prepares at the calcination temperature of 300~550°C is basically the same, and the crystal form transformation occurs at the calcination temperature of 550~600°C. TiO2 samples calcines at 400°C (T400) have higher specific surface area, larger total pore volume and average pore diameter. The crystalline degree of synthetic zinc ferrite is high, the micropores on the crystal surface are closed, and the grains bond with each other. The specific surface area, total pore volume and average pore diameter of purified zinc ferrite are larger than those of synthetic zinc ferrite. The effects of specific surface area, pore volume and pore structure on the adsorption capacity and catalytic efficiency are as follows: T400> purified zinc ferrite > synthesized zinc ferrite.

Adsorption of Amido Black 10B by Zinc Ferrite and Titanium Dioxide

“…At 600 • C, the adsorption capacity and removal rate of AB10B decreased sharply. According to the analysis of XRD [27], titanium dioxide started to change from anatase type to rutile type at this temperature. The structure stability of rutile-type titanium dioxide was higher than that of anatase-type titanium dioxide, which also indirectly indicates that rutile-type titanium dioxide has fewer surface defects and fewer adsorption sites.…”