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Morphology controlled synthesis of α-FeOOH crystals and their shape-dependent adsorption for decontamination of Congo red dye

Authors :
Qiang Wang
E. L. Zhang
X. T. Liu
X. J. Sun
Source :
Materials Research Innovations. 19:385-391
Publication Year :
2015
Publisher :
Informa UK Limited, 2015.

Abstract

The α-FeOOH nanorods with superb adsorption properties have been synthesised by a facile and scaled-up method. In this approach, KOH solution concentration plays a crucial role in controlling the morphology of α-FeOOH nanaocrystals. It has been demonstrated that the synthesised α-FeOOH nanorods are about 10 nm in diameter and 100 nm in length. The α-FeOOH nanorods have a high specific surface area (333 m2 g− 1), and exhibited super adsorption properties, with maximum adsorption capacity of 104.2 mg g− 1 for Congo red (CR). The as-prepared nanorods show a larger specific surface area than the nanoparticles do, which enhance their adsorption capacity and increase their potential for application in wastewater treatment. The adsorption process of CR on α-FeOOH nanorods was systematically investigated, which was found to obey the pseudo-second-order rate equation and Langmuir adsorption model.

Details

ISSN :
1433075X and 14328917
Volume :
19
Database :
OpenAIRE
Journal :
Materials Research Innovations
Accession number :
edsair.doi...........53301190d7332723d24b6b24b1e8871e