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Nitrogen‑doped and hierarchically porous carbon derived from spent coffee ground for efficient adsorption of organic dyes KCI 등재

  • 언어ENG
  • URLhttps://db.koreascholar.com/Article/Detail/420706
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Carbon Letters (Carbon letters)
한국탄소학회 (Korean Carbon Society)
초록

Here, a novel nitrogen-doped carbon nano-material (N-CGNM) with hierarchically porous structure was prepared from spent coffee ground for efficient adsorption of organic dyes by a simple one-step carbonization process (the uniform mixture consists of spent coffee ground, urea, and CaCl2 with the ratio of 1:1:1, which was heated to 1000 °C with a rate of 10 °C min− 1 and held at 1000 °C for 90 min in N2 atmosphere to carry out carbonization, activation, and N-doping concurrently). The morphology and structure analysis show that the prepared N-CGNM exhibits hierarchical pore structure, high specific surface area (544 m2/ g), and large numbers of positively charged nitrogen-containing groups. This unique structure and chemical composition endow N-CGNM with an excellent adsorption capacity toward anion Congo red (623.12 ± 21.69 mg/g), which is obviously superior to that (216.47 ± 18.43 mg/g) of untreated spent coffee ground-based carbon nano-materials (CGM). Oppositely, the adsorption capacity of N-CGNM towards cation methylene blue is inferior to that of CGM due to the existence of electrostatic repulsion. These findings show a great guidance for the development of low-cost but efficient selective adsorbent.

목차
    Abstract
    1 Introduction
    2 Experience
        2.1 Materials
        2.2 Preparation of N-CGNM
        2.3 Materials characterization
        2.4 Adsorption experiments
    3 Results and discussion
        3.1 Morphology and structure characterization
        3.2 Adsorption of dyes
        3.3 Adsorption isotherm and kinetics
    4 Conclusion
    Acknowledgements 
    References
저자
  • Zhong Dai(School of Materials Science and Engineering, Xi’an University of Technology)
  • Peng‑Gang Ren(School of Materials Science and Engineering, Xi’an University of Technology, Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology)
  • Hua Zhang(School of Materials Science and Engineering, Xi’an University of Technology)
  • Xin Gao(Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology)
  • Yan‑Ling Jin(School of Materials Science and Engineering, Xi’an University of Technology, Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi’an University of Technology)