Abstract：α-Fe2O3 and hexagonal cubic WO3 nanorods were successfully prepared by new combustion synthesis and hydrothermal method, respectively. WO3-Fe2O3 heterojunction was prepared by solvent dispersion method. The product was characterized by XRD, TEM, BET specific surface area and UV - Vis diffuse reflectance spectroscopy （DRS）. The photocatalytic degradation of Rhodamine B in aqueous solution was used as a probe reaction. The results indicate that particles are all rodlike, with sizes of about 80 nm and specific surface area of 46.91 m2/g. The heterojunction has a strong absorption in the visible light range and its band gap is calculated to be 2.4 eV. WO3-Fe2O3 has marked photocatalytie degrada- tion activity of multiple dyes. The highest degradation efficiency is reached at 97.73% when 0.1 g WO3-Fe2O3 （ω（Fe2O3） = 5% ）was dispersed in 100 mL at 10 mg/L Rhodamine B. Basis on the calculated energy band positions, the mechanism of enhanced photocatalytic activity is discussed.
2009, Vol. 30 
