摘要: Activated carbon fibers (ACF) were treated by a solution of palladium chloride (PdCl₂), cuprous chloride (CuCl), or graphene oxide (GO). Surface morphology of the treated ACF was examined by scanning electron microscope (SEM) and its surface functionality was assessed by X-ray photoelectron spectroscopy (XPS). The treated ACF was added into cavity-style composite cigarette filters. The yields of nicotine-free-dry-particulate-matter (NFDPM), carbonyls and phenols in mainstream smoke were analyzed. The results showed that the modification changed the pore structure and the surface chemical properties, especially the absorption ability of ACF. Compared with a reference cigarette, the yields of NFDPM, phenol and catechol of the cigarette with ACF treated by PdCl₂/CuCl (Pd²⁺/Cu⁺-ACF) were reduced by 8.3%, 22.7% and 35.7%, respectively. In addition, the ACF treated by GO (GO-ACF) had a selective filtration affinity for carbonyls and phenols. The reduction ratio of NFDPM of the cigarette with GO-ACF was the same as Pd2+/Cu+-ACF, while the yields of phenol, catechol and crotonaldehyde was decreased by 28.3%, 18.0% and 33.4%, respectively. The reduction for carbonyls and phenols was found to be less dependent on the specific surface area (S_BET) of ACF, implying that chemisorption played an important role.