期刊
APPLIED SURFACE SCIENCE
卷 324, 期 -, 页码 854-863出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.11.060
关键词
Magnetic colloidal nanocrystal clusters; Surface functionalization; Dye adsorption; Electrostatic interactions; Poly(4-styrenesulfonic acid-co-maleic acid) sodium
类别
资金
- National Natural Science Foundation of China [21106116]
- project of academic innovation team, Southwest University for Nationalities [XN2014-4]
- project of postgraduate degree construction, Southwest University for Nationalities [2014XWD-S0703]
- Innovative research program for students of Southwest University for Nationalities [CX2014SZ57]
Magnetic colloidal nanocrystal clusters (MCNCs) modified with different amounts of poly(4-styrenesulfonic acid-co-maleic acid) sodium (PSSMA) have been prepared through simple one-step solvothermal method for removal of methylene blue (MB) from aqueous solution. The prepared MCNCs are characterized by Fourier transform infrared (FT-IR) spectra, scanning electron microscope (SEM), transmission electron microscope (TEM), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), X-ray diffraction (XRD), nitrogen adsorption-desorption technique and dynamic light scattering (DLS). Moreover, effects of the solution pH, contact time, adsorbent dosage, ionic strength and initial dye concentration on MB adsorption onto the MCNCs are systematically investigated. The PSSMA-modified MCNCs show fast and highly-efficient MB removal capacity, which dramatically depends on the immobilization amounts of PSSMA, solution pH and adsorbent dosage. Their adsorption kinetics and isotherms exhibit that the kinetics and equilibrium adsorptions can be well-described by pseudo-second-order kinetic and Langmuir model, respectively. These magnetic nanocomposites, with high separation efficiency, low production cost and recyclable property, are promising as functional adsorbents for efficient removal of cationic organic pollutants from aqueous solution. (C) 2014 Elsevier B.V. All rights reserved.
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