Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 531, Issue -, Pages 394-403Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.07.071
Keywords
4-Vinylpyridine; Post-cross-linked resin; Porogen; Adsorption
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Funding
- National Natural Science Foundation of China [21506016, 51673216]
- Changsha University
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Herein 4-vinylpyridine (4-VP) was employed as the functional monomer to copolymerize with divinylbenzene using 1,2-dichloroethane (DCE) as the porogen, and a series of 4-vinylpyridine-modified post cross -linked resins was fabricated. The effect of 4-VP and DCE percentage on the porosity, polarity, and adsorption was investigated in detail. The results indicate that the porosity and nitrogen (N) content of the as-prepared resins can be easily regulated by changing the 4-VP and DCE percentage. Specifically, HPDN-10%-300% with 10 wt% 4-VP and 300 wt% DCE has the highest specific surface area (S-BET) and pore volume (V-total), while HPDN-10%-100% with 100 wt% DCE has the greatest micropore area (S-micro) and micropore volume (V-micro). Furthermore, the equilibrium adsorption experiments of the resins exhibit that the adsorption of phenol on HPDN-10%-100% is the most efficient by reason of its greatest S-micro and V-micro, whereas HPDN-10%-300% owns the largest equilibrium capacity to Rhodamine B (RB) because of its highest S-BET, V-total and broad pore size distribution (PSD). The kinetic adsorption reveal that HPDN-10%-100% needs the least time to reach equilibrium for the adsorption of phenol while the adsorption of RB on HPDN-10%-300% is the fastest. The temperature is disadvantageous for the adsorption and the isosteric enthalpy at zero fractional loading is predicted to be -40.39 and -56.38 kJ/mol for phenol and RB on the resins, respectively. (C) 2018 Elsevier Inc. All rights reserved.
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