Effects of ammonium dibasic phosphate pretreatment time on the structure and properties of PAN-based activated carbon hollow fibers

Authors

  • Junfen Sun,

    Corresponding author
    1. State Key Laboratory for modification of Chemical Fibers and Polymer Materials, College of Material Science & Engineering, Donghua University, Shanghai 200051, People's Republic of China
    • State Key Laboratory for modification of Chemical Fibers and Polymer Materials, College of Material Science & Engineering, Donghua University, Shanghai 200051, People's Republic of China
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  • Chunju He,

    1. State Key Laboratory for modification of Chemical Fibers and Polymer Materials, College of Material Science & Engineering, Donghua University, Shanghai 200051, People's Republic of China
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  • Sijun Zhu,

    1. State Key Laboratory for modification of Chemical Fibers and Polymer Materials, College of Material Science & Engineering, Donghua University, Shanghai 200051, People's Republic of China
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  • Qingrui Wang

    1. State Key Laboratory for modification of Chemical Fibers and Polymer Materials, College of Material Science & Engineering, Donghua University, Shanghai 200051, People's Republic of China
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Abstract

Polyacrylonitrile (PAN) hollow fibers were pretreated with ammonium dibasic phosphate aqueous solution, then further oxidized in air, carbonized in nitrogen, and activated with carbon dioxide. The effects of pretreatment time of PAN hollow fibers in ammonium dibasic phosphate aqueous solution on the microstructure, specific surface, pore-size distribution, and adsorption properties of PAN-based activated carbon hollow fibers (PAN-ACHF) were studied in this work. After the activation process, the Brunaner–Emmett–Teller (BET) surface area of the PAN-ACHF and surface area of mesopores in the PAN-ACHF increases and reaches 513 m2 g−1 and 66 m2 g−1 respectively, when the dipping time of PAN hollow fibers in ammonium dibasic phosphate aqueous solution is 30 min. The adsorptions to creatinine and VB12 of PAN-ACHF are much high, reach 95% and 86% respectively, when dipping time is 30 min. The dominant pore sizes of mesopores in PAN-ACHF range from 2 nm to 5 nm. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 2448–2453, 2006

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