A nanoporous titania was made with an activated carbon template in a supercritical CO2 solvent. Titanium isopropoxide dissolved in supercritical CO2 with isopropanol was attached to an activated carbon template in an autoclave at 423 K and 32 MPa for 2 h. The activated carbon template was removed by treatment in oxygen plasma or by calcination in air at 873 K. The fibrous shape with a high surface area in the activated carbon template was replicated in the titania sample treated in the oxygen plasma. The surface area of the titania sample was 387 m(2)/g. The titania sample crystallized in the anatase form.