Nanoporous ferric oxide prepared with activated carbon template in supercritical carbon dioxide

Nanoporous ferric oxide has been prepared with nanoscale casting process using activated carbon template in supercritical carbon dioxide. The precursors with the cosolvent of acetone were dissolved in supercritical CO2, and then attached to activated carbon in the supercritical condition. After removal of the activated carbon template by calcinations in air at 873 K, the nanoporous Fe2O3 was obtained. Four factors were considered to study the effect on the coating ratio and yield. The structure and morphology of the products were characterized through nitrogen adsorption–desorption isotherms, thermal gravimetric analysis (TGA), wide-angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM).