Solid–solid grinding/templating route to magnetically separable nitrogen-doped mesoporous carbon for the removal of Cu2+ ions

•NOMC or Fe-embedded NOMC were synthesized by grinding/templating route.•Magnetic α-Fe can be embedded in NOMC and led to the formation of irregular hollow tubular morphology.•Fe-embedded NOMC material displayed an excellent adsorption capacity for Cu2+ ions. N-doped ordered mesoporous carbon materi...

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Veröffentlicht in:Journal of hazardous materials 2014-08, Vol.279, p.280-288
Hauptverfasser: Chen, Aibing, Yu, Yifeng, Zhang, Yue, Xing, Tingting, Wang, Yanyan, Zhang, Yexin, Zhang, Jian
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Sprache:eng
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Zusammenfassung:•NOMC or Fe-embedded NOMC were synthesized by grinding/templating route.•Magnetic α-Fe can be embedded in NOMC and led to the formation of irregular hollow tubular morphology.•Fe-embedded NOMC material displayed an excellent adsorption capacity for Cu2+ ions. N-doped ordered mesoporous carbon materials (NOMC) with 2D hexagonal symmetry structure were synthesized via a facile solid–solid grinding/templating route, in which the ionic liquids (ILs) of 1-cyanoethyl-3-methylimidazolium chloride and SBA-15 were employed as the precursor and hard template, respectively. The as-synthesized NOMC features with a uniform mesoporous size (3.5nm), ropes-like morphology (0.4–1μm in length) and high surface area (803m2/g). The quantitative analysis revealed the nitrogen content on the surface of NOMC is 5.5at%. Magnetic iron nanoparticles were successfully embedded into the carbon matrix by introducing iron chloride to the mixture of SBA-15 and ILs during the synthesis process. The NOMC-Fe composite possessed superior adsorption capacity of Cu2+ ions (23.6mg/g). Kinetic and isothermal analysis demonstrated the strong interactions between Cu2+ ion and the adsorbent. Furthermore, the composite was magnetically separable from solution under an external magnetic field and thus displayed a superior reusability in the recycling test.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2014.07.011