Abstract
Three-dimensional polypyrrole/chitosan nanocomposite monoliths are fabricated by polymerization of pyrrole in chitosan aqueous solution. The static polymerization of pyrrole monomer and the cross-linking of chitosan by glutaraldehyde occur simultaneously, resulting in the self-assembly of polypyrrole/chitosan nanocomposite aerogel monolith. The addition of methyl orange and glutaraldehyde and the static reaction play key roles in the formation of the self-standing aerogel monolith. The as-prepared monolith with larger specific surface area exhibits much better adsorption capability for Cr(VI) removal in comparison with that prepared without the addition of glutaraldehyde. The adsorption process and adsorption isotherms are found to well follow the pseudo-second-order and Langmuir models, respectively. Furthermore, this polypyrrole/chitosan nanocomposite monolith is stable and recyclable. About 73.5% of the initial adsorption capability is kept after eight adsorption–desorption cycles. The polypyrrole/chitosan nanocomposite monolith can be a promising candidate for the efficient removal of Cr(VI).
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Acknowledgements
The work was supported by Outstanding Youth Scientific Innovation Team of Colleges and Universities in Hubei Province (T201406), National Natural Science Foundation of China (51403167), Graduate Innovative Fund of Wuhan Institute of Technology (CX2016001), and Training Programs of Innovation and Entrepreneurship for Undergraduates (201610490019).
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Ji, J., Xiong, H., Zhu, Z. et al. Fabrication of Polypyrrole/Chitosan Nanocomposite Aerogel Monolith for Removal of Cr(VI). J Polym Environ 26, 1979–1985 (2018). https://doi.org/10.1007/s10924-017-1095-1
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DOI: https://doi.org/10.1007/s10924-017-1095-1