Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 215, Issue -, Pages 123-131Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2018.03.051
Keywords
Nitrogen-enriched carbon sheet; Adsorbent; Methyl blue removal; pH-sensitive behavior; Regeneration
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Funding
- National Natural Science Foundation of China [51678307]
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In this work, nitrogen-enriched carbon sheet (NECS) was successfully fabricated by using sodium gluconate as a carbon source via melamine assisted chemical blowing approach. The obtained material exhibits sheet-like morphology with ultra-thin thickness and has a high specific surface area of 604 m(2)g(-1) and high nitrogen contents of 11.2 wt%. The NECS showed an excellent adsorption performance towards the removal of anionic dye Methyl blue (a-Mb). The adsorption of a-Mb onto NECS better fitted the Langmuir isotherm model with the highest adsorption capacity of 847 mg g(-1). Interestingly, the NECS showed a pH-sensitive behavior towards the adsorption efficiency of a-Mb dye in which the adsorption capacity abruptly increased from 34 to 701 mg g(-1) when the pH of the solution was decreased from 10 to 2. Furthermore, the adsorbed materials can be easily regenerated without obvious efficiency loss over a five adsorption-desorption cycles. (C) 2018 Elsevier Ltd. All rights reserved.
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