Superhydrophobic Activated Carbon-Coated Sponges for Separation and Absorption

Authors

  • Hanxue Sun,

    1. State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Key Laboratory of Nonferrous Metal Alloys and Processing, Ministry of Education, College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050 (PR China), Fax: (+86) 931-2973305
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  • Prof. An Li,

    Corresponding author
    1. State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Key Laboratory of Nonferrous Metal Alloys and Processing, Ministry of Education, College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050 (PR China), Fax: (+86) 931-2973305
    • State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Key Laboratory of Nonferrous Metal Alloys and Processing, Ministry of Education, College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050 (PR China), Fax: (+86) 931-2973305
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  • Zhaoqi Zhu,

    1. State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Key Laboratory of Nonferrous Metal Alloys and Processing, Ministry of Education, College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050 (PR China), Fax: (+86) 931-2973305
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  • Dr. Weidong Liang,

    1. State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Key Laboratory of Nonferrous Metal Alloys and Processing, Ministry of Education, College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050 (PR China), Fax: (+86) 931-2973305
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  • Dr. Xinhong Zhao,

    1. State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Key Laboratory of Nonferrous Metal Alloys and Processing, Ministry of Education, College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050 (PR China), Fax: (+86) 931-2973305
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  • Prof. Peiqing La,

    1. State Key Laboratory of Gansu Advanced Nonferrous Metal Materials, Key Laboratory of Nonferrous Metal Alloys and Processing, Ministry of Education, College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050 (PR China), Fax: (+86) 931-2973305
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  • Prof. Weiqiao Deng

    Corresponding author
    1. State Key Laboratory of Molecular Reaction Dynamics, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023 (PR China)
    • State Key Laboratory of Molecular Reaction Dynamics, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023 (PR China)
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Abstract

Highly porous activated carbon with a large surface area and pore volume was synthesized by KOH activation using commercially available activated carbon as a precursor. By modification with polydimethylsiloxane (PDMS), highly porous activated carbon showed superhydrophobicity with a water contact angle of 163.6°. The changes in wettability of PDMS- treated highly porous activated carbon were attributed to the deposition of a low-surface-energy silicon coating onto activated carbon (confirmed by X-ray photoelectron spectroscopy), which had microporous characteristics (confirmed by XRD, SEM, and TEM analyses). Using an easy dip-coating method, superhydrophobic activated carbon-coated sponges were also fabricated; those exhibited excellent absorption selectivity for the removal of a wide range of organics and oils from water, and also recyclability, thus showing great potential as efficient absorbents for the large-scale removal of organic contaminants or oil spills from water.

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