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Issue 4, 2016
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Meso- and microporous soft templated hydrothermal carbons for dye removal from water

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Abstract

The hydrothermal carbonization (HTC) technique has shown a great ability in the synthesis of carbon materials with special properties for a wide range of different applications. Here, a hypersaline salt mixture (LiCl–ZnCl2) combined with hydrothermal carbonization was applied in order to obtain sulfur containing micro- and mesoporous (0.3–40 nm) monolithic carbons with high surface areas (400–550 m2 g−1) and well developed porosity (0.4–1.2 cm3 g−1). Fructose was used as a carbon source and sulfur was introduced in an aromatic configuration as 2-thiophenecarboxaldehyde. The resulting carbon materials showed a promising removal capacity (qe = 0.3 mmol g−1) towards methylene blue and the adsorption followed the Sips isotherm independent of the pH. Intraparticle diffusion appeared to control the adsorption kinetics. Carbon materials could be easily regenerated with simple ethanol washing. The dye pollutant could be completely desorbed from the adsorbent's surface, while the adsorbent still maintained removal efficiency of above 90% during three cycles.

Graphical abstract: Meso- and microporous soft templated hydrothermal carbons for dye removal from water

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Publication details

The article was received on 04 Aug 2015, accepted on 02 Oct 2015 and first published on 05 Oct 2015


Article type: Paper
DOI: 10.1039/C5GC01796C
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Citation: Green Chem., 2016,18, 1137-1146
  • Open access: Creative Commons BY-NC license
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    Meso- and microporous soft templated hydrothermal carbons for dye removal from water

    S. Alatalo, E. Mäkilä, E. Repo, M. Heinonen, J. Salonen, E. Kukk, M. Sillanpää and M. Titirici, Green Chem., 2016, 18, 1137
    DOI: 10.1039/C5GC01796C

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