Preparation Of Fe Base Nanomaterisls And Their Photocatalytic Characterization

Artificial photosynthesis holds great promise for addressing global energy and environmental problems. Extensive studies have been devoted to exploiting highly-efficient semiconductor photocatalysts to be photoactive in H2 evolution and organic pollutant degradation under visible light irradiation. Nanometer semiconductor materials act as photocatalyst for degrading organic pollutants have been paid more attentions in the field of materials. Compared with the block materials, nano materials have unique properties, such as small size effect, surface effect, quantum size effect. These effects make nano material has better physical and chemical properties than block material and has been widely used in catalysis, sensors, electrode materials, electrical equipment, and other fields.Due to the its excellent properties, nanometer iron oxide has a wide range of applications special in electrode materials, catalysis, sensors. this paper mainly studies its application in photocatalysis. Samples were prepared by EISA method and hydrothermal method, furthermore, by using the method of doping metal ions and composition with other semiconductor materials to enhance the photocatalytic activity.(1) Fe(N03)3-9H2O was as raw material, using the EISA method prepared mesoporous Fe2O3, then, doping Ti ion to increase its specific surface, thus enhanced photocatalytic activity. XRD characterization, Nitrogen adsorption isotherm measurements and photocatalytic degradation of the gas phase isopropyl alcohol were used to evaluate the phase, mesoporous structure and activity. The results showed that Ti doped 380℃ calcined iron oxide show the highest catalytic activity.(2) Synthesizing Fe2O3 and ZnFe2O4nano particles by hydrothermal mothed respectively, then mixed above two obtained samples and calcined at high temperature, thus achieved the Fe2O3/ZnFe2O4 composition. The samples were test by XRD characterization, Nitrogen adsorption isotherm measurements, photocatalytic degradation of the gas phase isopropyl alcohol. The results show that the composition of Fe2O3/ZnFe2O4 possess the highest activity among the all samples.In summary, the mothed of doping Ti and composited with ZnFe2O4 can enhanced the photocatalytic activity of Fe2O3 effectively.