| Hydrogen generation through thermo-chemical water splitting process with active oxygen-deficient ferrite has been paid close attention at abroad in recent years. In this paper, intermingled different metal element ferrites were synthesized by co-precipitation method and oxygen-deficient ferrite was prepared through the following calcinations. The crystal structure, thermal properties, chemical composition and the oxygen-dificient value(δ) were investigated and determined in detail by X-ray diffraction (XRD),Thermo-gravirnetry-Differential Thermal Analysis (TGA-DTA), Atomic adsorption spectrometry (AAS),ultraviolet-visible(UV-Vis), and so on. Through research the effect on co-precipitation temperature and the pH, CoFe2O4, CuFe2O4, MnFe2O4, MgFe2O4, NiFe2O4,ZnFe2O4 and Mn0.1Cu0.9Fe2O4 were synthesized. It was found that co-precipitation temperature played an important role in the formation of MnFe2O4, spinel MnFe2O4 was prepa(?)ed at 80℃ without heat treatment, and the formation process was discussed.The results of DTA-TG indicated that CuFe2O4, MnFe2O4 and Mn0.1Cu0.9Fe2O4 had lower decomposed temperature and are promising for hydrogen production through thermo-chemical water splitting. The determination methods of oxygen-deficient value(δ) and chemical composition were investigated, the effects of calcination temperature and time on the 8 value were studied. In addition, it was found that Mn0.1Cu0.9Fe2O4 could form higher 8 in a short time at 900℃. The experimental setup of the two-step thermal chemical cycle reactor for hydrogen generation was designed and developed, the hydrogen generation process of water splitting through oxygen-deficient Mn0.1Cu0.9Fe2O4 was studied preliminarily, and the feasibility of two-step water-splitting with Mn0.1Cu0.9Fe2O4 as active intermediate was confirmed. |
