期刊
JOURNAL OF MATERIALS SCIENCE
卷 48, 期 21, 页码 7708-7717出版社
SPRINGER
DOI: 10.1007/s10853-013-7591-3
关键词
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资金
- National Natural Science Foundation of China [21207001]
- Natural Science Fund of Anhui Provincial Education committee of P. R. China [KJ2012Z036]
- Anhui Province College Outstanding Young Talent Fund of P. R. China [2012SQRL032ZD]
In this study, flake-like polyaniline/montmorillonite (PANI/MMT) nanocomposites with rough surface were successfully prepared by in situ chemical oxidation polymerization during which poly(2-acrylamido-2-methylpropanesulfonic acid), a polymer acid, on the surface of clay platelets was used as dopant of PANI and played a 'bridge' role to combine PANI with clay. Flake thickness and surface roughness of PANI/MMT composites decreased with the increase of montmorillonite/aniline feeding ratio. The effects of operating parameters including pH, contact time, Cr(VI) concentration, and adsorbent dose were studied. The pseudo-second-order equation and three adsorption isotherms including Langmuir, Freundlich, and Temkin equations were applied to determine the adsorption rate and capacity. The results show that the flake-like PANI/MMT nanocomposites exhibited a high adsorption capacity (167.5 mg/g). The excellent adsorption characteristic of flake-like PANI/MMT nanocomposites will render it a highly efficient and economically viable adsorbent for Cr(VI) removal.
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