B/N-doped carbon sheets from a new ionic liquid with excellent sorption properties for methylene blue

Journal of Ionic Liquids

Peter Wasserscheid¹  Florian Maier²  Hans-Peter Steinrück²  Ulrike Paap²  Bettina S.J. Heller²  Martin Hartmann³  Matthias Ermer³  Carsten Korte⁴  Julian Mehler⁵  Peter S. Schulz⁵ 

[1] Corresponding author.;Chair of Physical Chemistry II, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany;Erlangen Center for Interface Research and Catalysis (ECRC), Friedrich-Alexander University Erlangen-Nürnberg, 91058, Erlangen, Germany;Forschungszentrum Jülich, Institute of Energy and Climate Research - Fuel Cells (IEK-14), 52425 Jülich, Germany;Institute of Chemical Reaction Engineering, Friedrich-Alexander University Erlangen-Nürnberg, 91058 Erlangen, Germany;

关键词: Material synthesis;    Ionic liquid precursor;    B/N doped carbon nanosheets;    Adsorption;   

DOI  :  

来源: DOAJ

【 摘 要 】

The pyrolytic treatment of the novel ionic liquid 1-ethyl-3-methyl-imidazolium tetrakis-(1-imidazolyl)borate ([EMIM][BIm4]) allowed the preparation of B/N-doped carbonaceous materials with an exceptional performance in the adsorptive removal of the cationic dye methylene blue (MB) from wastewater. [EMIM][BIm4] was prepared via an easy and scalable synthesis protocol in very good yield. The carbon materials obtained after salt templated pyrolysis of the IL displayed high degrees of heteroatom doping (up to 22 wt% N, 3 wt% B) and high surface areas of up to 1860 m2 g−1. The materials were tested for their performance in the adsorptive removal of MB from contaminated water. Adsorption equilibrium experiments revealed an adsorption capacity exceeding500 mg g−1, which is, to the best of our knowledge, the highest value reported so far. Time-resolved adsorption experiments showed that the materials not only exhibit high capacity but also very fast adsorption kinetics. Complete decolorization of MB solutions in only 5 min at high MB concentrations of 100 mg L−1 was observed. These results demonstrate that [EMIM][BIm4] is an excellent precursor for the preparation of IL-derived B/N-doped carbon sorbents.

【 授权许可】

Unknown