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Surfactant-assisted nanorod synthesis of α-FeOOH and its adsorption characteristics for methylene blue

Published online by Cambridge University Press:  27 January 2014

Jinhua Zhang*
Affiliation:
Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China
Xiaomeng Zhu
Affiliation:
Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China
Kun Yu
Affiliation:
Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Sodium dodecyl sulfate (SDS) was chosen as the structure controller and surface modifier for hydrothermal preparation of surfactant-modified goethite (α-FeOOH) nanorods. The as-synthesized samples were characterized by transmission electron microscopy, x-ray diffraction, Fourier transform infrared spectroscopy, Brunauer, Emmett and Teller technique, and potentiometric titration. Adsorption study using methylene blue (MB) as a model pollutant was conducted onto the surfactant-modified goethite surface. The results showed that the surfactant-modified α-FeOOH nanorods had high adsorption capacity. MB could be efficiently removed from the solution at pH 5, initial MB concentration 200 mg/L, α-FeOOH dosage 0.5 g/L, and temperature 30 °C, with 96% removal ratio. The adsorption capacity was found to be as high as 385 mg/g. The adsorption kinetic data could be described well by the pseudo-second-order model. The isothermic data were highly fitted to Langmuir isotherm. High adsorption capacity and simple reaction conditions give this novel material good prospects in future applications.

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Articles
Copyright
Copyright © Materials Research Society 2013 

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References

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