Synthesis of Porous α-Fe₂O₃ Nanorods and Deposition of Very Small Gold Particles in the Pores for Catalytic Oxidation of CO

FeO(OH) nanorods were prepared by a mild hydrothermal synthesis using tetraethylammonium hydroxide (TEAOH) as the structure director. The as-prepared FeO(OH) was converted to porous α-Fe2O3 nanorods via calcination at 300 °C. The α-Fe2O3 nanorods have a pore size distribution in the range of 1−5 nm, which is ideal to house very small gold (Au) particles. Later, by employing our invented Au- colloid-method, in which lysine was used as the capping...