Preparation of magnetic MnFe2O4-Cellulose aerogel composite and its kinetics and thermodynamics of Cu(II) adsorption
In this paper, a MnFe2O4-Cellulose magnetic composite aerogel (MnCA) with high adsorption capacity was fabricated by in situ incorporating MnFe2O4 to regenerated cellulose hydrogel matrix, followed by CO2 supercritical drying. A green synthetic strategy was performed by using renewable cellulose materials, environmentally benign cellulose solvents and facile synthetic conditions. The results showed that the obtained magnetic cellulose aerogel had a continuous and tiered three dimensional network with interconnected fibrils of about 30 nm in width, which was similar to those of cellulose aerogel prepared from NaOH/urea solution via CO2 supercritical drying. Meanwhile, they had high specific surface areas of 236–288 m2/g and total pore volume of 0.55–0.88 cm3/g. In addition, the hybrid aerogel showed superparamagnetism with maximum saturation magnetization reaching up to 18.53 emu/g. The magnetic nanocomposite aerogel could be used for biological and environmental applications. The adsorption test showed that MnCA had rapid adsorption rate and excellent adsorption ability of removing heavy metal ions in aqueous solution which could attain to 63.3 mg/g within 100 min. Moreover, all the composite aerogels exhibited good reusability and could be easily reused from the water after adsorption.
KeywordsMagnetic aerogel MnFe2O4-Cellulose Composites Copper ion Adsorption
This work was financially supported by the NSFC (81471183), the clinical medical special Program of Science and Technology Project of Jiangsu Province (BL2014074), the Industry Program of Science and Technology Support Project of Jiangsu Province (BE2014128, BE2016171), the Prospective Joint Research Program of Jiangsu Province (BY2015005-01), the Major Program of Natural Science Fund in Colleges and Universities of Jiangsu Province (15KJA430005), the General Program of Social Development Project of Jiangsu Province (BE2015672), the Program for Changjiang Scholars and Innovative Research Team in University (No.IRT_15R35) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (BK2014377). Any opinions, findings, and conclusions or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of these programs.
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