ENHANCEMENT OF NO ADSORPTION ON PITCH-BASED ACTIVATED CARBON-FIBERS BY DISPERSION OF CU-DOPED ALPHA-FEOOH FINE PARTICLES

The effects of dispersion of ultrafine Cu-doped alpha-FeOOH particles on the surface of pitch-based activated carbon fibers (ACF) on their NO adsorption capacity were examined at 303 K. Nitrogen adsorption isotherms of the samples were determined at 77 K, and their microporosity characteristic data were obtained from alpha(s)- and Dubinin-Radushkevich plots. The dispersion of alpha-FeOOH increased the saturation uptake of NO by pre-oxidized ACF (alpha-ACF) by more than 50%. Cu doping of the dispersed alpha-FeOOH particles enhanced the NO adsorptivity of ox-ACF remarkably. The alpha-FeOOH-dispersed ox-ACF, heat treated at 773 K in vacuo, showed the largest amount of NO adsorption. However, no enhancement effects were observed in the case of ACF without preoxidation.