Preparation and characterization of Fe~(3+)-doped TiO_2/diatomite composite

摘要

Fe~(3+)-doped TiO_2/diatomite composite photocatalyst were prepared by sol-gel method with titanium isopropoxide used as precursor material. The samples were characterized by SEM, XRD, XPS, BET surface area analysis and UV-Vis techniques. The results showed that the optimum concentration of Fe~(3+) in the composite catalyst was 0.2wt% when the quantity of TiO_2 loaded on the diatomite was 30.3wt%. Compared with the un-doped photocatalyst, the Fe~(3+)-doped sample exhibited red shifts of absorption edge and significant enhancement of light absorption at 400～600 nm.