期刊
CARBON
卷 111, 期 -, 页码 162-172出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2016.09.035
关键词
-
资金
- Natural Science Foundation of China [51278386, 51325102]
- Natural Science Foundation of Hubei Province [2015CFA017]
- [2015DFA90750]
The amorphous carbon derived from a molten salt CO2 capture and electrochemical transformation process, was characterized and studied for the adsorption of aqueous solutes. XRF and TG measurements showed that the electrolytic carbon (E-carbon) had a higher purity than the commonly available biochars and activated carbons due to its unique growth mechanism in molten salts. The analysis on morphology, diameter distribution and porosity indicated that the E-carbon, with an inhomogeneous porous structure, exhibited an average particle size of 9.8 nm in aqueous solution, and a BET surface area of 614 m(2) g(-1). The major surface oxygen-containing functional group for E-carbon was carboxyl group, which was primarily due to the cathodic deoxygenation of carbonate ions and the surface modifying effect of melt. The spontaneous Cu(II) adsorption by E-carbon followed the pseudo-second-order kinetic model and the Langmuir isotherm. Through the surface complexation and surface-precipitation processes, the E-carbon exhibited a maximum adsorptive capacity of 29.9 mg g(-1) for Cu (II) adsorption. It also showed a good performance on methylene blue adsorption due to its favorable adsorption-related features, such as high purity, porosity and having a large number of surface functional groups. The E carbon is envisaged to be used as an adsorptive material for decontamination. (C) 2016 Elsevier Ltd. All rights reserved.
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