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Frontiers of Materials Science

Front. Mater. Sci.    2016, Vol. 10 Issue (2) : 147-156     DOI: 10.1007/s11706-016-0330-3
Magnetic motive, ordered mesoporous carbons with partially graphitized framework and controllable surface wettability: preparation, characterization and their selective adsorption of organic pollutants in water
Bin ZHANG2,Chen LIU1,Weiping KONG1,*(),Chenze QI1,*()
1. Department of Chemistry, Shaoxing University, Shaoxing 312000, China
2. School of Chemistry & Chemical Engineering, Zhejiang Pharmaceutical College, Ningbo 315000, China
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Magnetically active, ordered and stable mesoporous carbons with partially graphitized networks and controllable surface wettability (PR-Fe-P123-800 and PR-Ni-P123-800) have been synthesized through direct carbonization of Fe or Ni functionalized, and ordered mesoporous polymers at 800°C, which could be synthesized from self assembly of resol (phenol/formaldehyde) with block copolymer template (P123) in presence of Fe3+ or Ni2+, and hydrothermal treatment at 200°C. PR-Fe-P123-800 and PR-Ni-P123-800 possess ordered and uniform mesopores, large BET surface areas, good stabilities, controllable surface wettability and partially graphitized framework. The above structural characteristics result in their enhanced selective adsorption property and good reusability for organic pollutants such as RhB, p-nitrophenol and n-heptane in water, which could be easily regenerated through separation under constant magnetic fields and washing with ethanol solvent. The unique magnetically active and adsorptive property found in PR-Fe-P123-800 and PR-Ni-P123-800 will be very important for them to be used as efficient absorbents for removal of various organic pollutants in water.

Keywords magnetic separation      mesoporous carbon      graphitization      adsorption      high temperature synthesis     
Corresponding Authors: Weiping KONG,Chenze QI   
Online First Date: 18 February 2016    Issue Date: 11 May 2016
 Cite this article:   
Bin ZHANG,Chen LIU,Weiping KONG, et al. Magnetic motive, ordered mesoporous carbons with partially graphitized framework and controllable surface wettability: preparation, characterization and their selective adsorption of organic pollutants in water[J]. Front. Mater. Sci., 2016, 10(2): 147-156.
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Chen LIU
Weiping KONG
Chenze QI
Fig.1  (A) Small- and (B) wide-angle XRD patterns of PR-Fe-P123-800 (black) and PR-Ni-P123-800 (red).
Fig.2  (A) N2 isotherms and (B) pore size distribution of PR-Fe-P123-800 (black) and PR-Ni-P123-800 (red).
Samples SBET/(m2·g-1) a) Vp/(cm3·g-1) a) Pore sizes/nm b)
PR-Fe-P123-600 585 0.34 3.5
PR-Fe-P123-800 348 0.28 2.1
PR-Ni-P123-800 593 0.35 2.8
Activated carbon 980 0.48 <1.0
Amberlyst 15 45 0.33 46
XAD-4 800 1.15 24
Tab.1  Structural parameters of various samples
Fig.3  SEM images of (A)(B)(C) PR-Fe-P123-800 and (D)(E)(F) PR-Ni-P123-800.
Fig.4  TEM images of (A)(B) PR-Fe-P123-800 and (C)(D) PR-Ni-P123-800. (E)(F) HR-TEM images of PR-Fe-P123-800.
Fig.5  TG curves of as synthesized PR-Fe-P123-200 (a) and PR-Fe-P123-600 (b).
Fig.6  Room-temperature magnetization curves of PR-Fe-P123-800 (a) and PR-Fe-P123-600 (b).
Fig.7  Contact angles of PR-Fe-P123-800 for (A) water, (B) sunflower oil, (C) ethanol and (D)n-heptane.
Fig.8  (A) Adsorption curves of RhB in water over PR-Fe-P123-800 (a), 4 times recycled PR-Fe-P123-800 (b), XAD-4 (c), activated carbon (d), and Amberlyst 15 (e). (B) The scheme for the removal of organic dyes of RhB in water over PR-Ni-P123-800 by adding constant magnetic field.
Fig.9  Adsorption curves of PNP in water over PR-Fe-P123-800 (a), 4 times recycled PR-Fe-P123-800 (b), XAD-4 (c), and activated carbon (d).
Fig.10  (A) Saturated adsorptive capacity of n-heptane in liquid phase over XAD-4, Amberlyst 15 and PR-Fe-P123-800. (B) Scheme of selective adsorption of n-heptane in water over PR-Fe-P123-800, XAD-4, and Amberlyst 15.
Fig.1  Fig. S1 Raman spectrum of PR-Fe-P123-800.
Fig.2  Fig. S2 (A) N2 isotherm and (B) pore size distribution of activated carbon.
Fig.3  Fig. S3 TG curves of calcinated PR-Fe-P123 at 360°C and 800°C synthesized by using EISA method (a)(c) and hydrothermal route (b)(d).
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