期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 198, 期 -, 页码 282-290出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2011.10.041
关键词
Magnetite; Multi-walled carbon nanotubes; Adsorption; Methylene blue
资金
- National Natural Science Foundation of China [21103141]
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province [11CSPC-(1-7)]
- Program for Scientific and Technological Innovative Team in Sichuan Provincial Universities [2010008]
- Program for Scientific Research Innovation Team of China West Normal University
In this study, we have demonstrated the efficient removal of cationic dye, methylene blue (MB), from aqueous solution with the one-pot solvothermal synthesized magnetite-loaded multi-walled carbon nanotubes (M-MWCNTs). The as-prepared M-MWCNTs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy. The effects of contact time, initial dye concentration, and solution pH on the adsorption of MB onto M-MWCNTs were systematically studied. It was shown that the MB adsorption was pH-dependent. Adsorption kinetics was best described by the pseudo-second-order model. Equilibrium data were well fitted to the Langmuir isotherm model, yielding maximum monolayer adsorption capacity of 48.06 mg g(-1) FTIR analysis suggested that the adsorption mechanism was possibly attributed to the electrostatic attraction and it-it stacking interactions between MWCNTs and MB. (C) 2011 Elsevier B.V. All rights reserved.
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