title: Adsorption properties of regenerative materials for removal of low concentration of toluene.
abstract: A specific type of material, activated carbon fiber (ACF), was modified by SiO2, and the final products ACF-x were obtained as ACF-12.5, ACF-20, ACF-40, and ACF-80 according to different dosages of tetraethoxysilane (TEOS). The modified material on the ACF surface had a significant and smooth cover layer with low content of silica from scanning electron microscope (SEM) image. The modified ACF-x showed the stronger hydrophobicity, thermal stability, and adsorption capacity, which had almost no effect in the presence of water vapor and no destruction in multiple cycles. ACF-20 was proven as the most efficient adsorbent in humid conditions. The dual-function system composed of the regenerative adsorbents and the combustion catalyst would be efficient in consecutive toluene adsorption/oxidation cycles, in which the combustion catalyst was prepared by the displacement reaction of H2PtCl6with foam Ni. Therefore, the adsorption/catalytic oxidation could be a promising technique in the indoor air purification, especially in the case of very low volatile organic compound (VOC; toluene) concentration levels.
  
  
  
  Exploring highly effective adsorptive materials with less expensive costs becomes an urgent issue in the indoor air protection. ACF-20 modified by SiO2with Pt/Ni catalysts shows stronger hydrophobicity, thermal stability, and adsorption capacity. This dual-function system composed of the regenerative materials and the combustion catalyst would be a promising technique in the indoor air purification, especially in the case of removal of very low concentration of toluene.
authors: a College of Public Health , Jilin University , Changchun , People's Republic of China.
authors: Zhen-Zhen
authors: ZZ
authors: Xie
authors: a College of Public Health , Jilin University , Changchun , People's Republic of China.
authors: Lin
authors: L
authors: Wang
authors: a College of Public Health , Jilin University , Changchun , People's Republic of China.
authors: Ge
authors: G
authors: Cheng
authors: a College of Public Health , Jilin University , Changchun , People's Republic of China.
authors: Lei
authors: L
authors: Shi
authors: b Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Changchun , People's Republic of China.
authors: Yi-Bo
authors: YB
authors: Zhang
mesh_terms: D000327:Adsorption; D061808:Air Filters; D000393:Air Pollutants / Q000737:chemistry*; D016902:Air Pollution, Indoor / Q000517:prevention & control*; D002244:Carbon / Q000737:chemistry; D000077482:Carbon Fiber; D002384:Catalysis; D002606:Charcoal / Q000737:chemistry; D010084:Oxidation-Reduction; D012821:Silanes / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D014050:Toluene / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D000077482:Carbon Fiber; D012821:Silanes; D002606:Charcoal; D014050:Toluene; C040733:tetraethoxysilane; D002244:Carbon; D012822:Silicon Dioxide