For the development of Fe2O3 -doped nickel-based catalysts to be used in biomass gasification, nano-sized Fe2O3 were prepared by homogeneous precipitation method with ferric nitrate [ Fe (NO3)3 · 9H2O] as raw material and with urea as precipitator. Different approaches, such as XRD and SEM, were used to characterize the products. Meanwhile, effects of various technical parameters in preparation process on the yield of products were investigated, and optimal conditions were found for preparing nano-sized Fe2O3 ,which were as follows:molar ra...