dc.contributor.author |
Chauke, VP
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dc.contributor.author |
Maity, Arjun
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dc.contributor.author |
Chetty, A
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dc.date.accessioned |
2016-02-23T08:38:56Z |
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dc.date.available |
2016-02-23T08:38:56Z |
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dc.date.issued |
2015-07 |
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dc.identifier.citation |
Chauke, V.P, Maity, A and Chetty, A. 2015. High-performance towards removal of toxic hexavalent chromium from aqueous solution using graphene oxide-alpha cyclodextrin-polypyrrole nanocomposites. Journal of Molecular Liquids, vol. 211, pp 71-77 |
en_US |
dc.identifier.issn |
0167-7322 |
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dc.identifier.uri |
http://ac.els-cdn.com/S0167732215301811/1-s2.0-S0167732215301811-main.pdf?_tid=d81b0a34-cc0b-11e5-ab40-00000aab0f02&acdnat=1454678874_07c7a33f64d06cb18d23688596ca1f2e
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dc.identifier.uri |
http://hdl.handle.net/10204/8389
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dc.identifier.uri |
https://www.sciencedirect.com/science/article/pii/S0167732215301811
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dc.identifier.uri |
https://doi.org/10.1016/j.molliq.2015.06.044
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dc.description |
Copyright: 2016 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in Journal of Molecular Liquids, vol. 211, pp 71-77 |
en_US |
dc.description.abstract |
Graphene oxide (GO) was functionalized with alpha cyclodextrin (aCD) through a covalent bond to form GO-aCD nanocomposites (NC). GO-aCD NC was further modified with polypyrrole (PPY) to afford an advanced GO-aCD-PPY NC for the removal of highly toxic Cr(VI) from water. The prepared GO-aCD-PPY NCs were successfully characterised with AT-FTIR, FE-SEM, HR-TEM, BET and XRD techniques. Adsorption experiments were performed in batch mode to determine optimum conditions that include temperature, pH, concentration of
Cr(VI) and contact time. It was deduced from the experiments that the adsorption of Cr(VI) by the GO-aCD-PPY NC is pH and temperature dependent, where optimum adsorption was achieved at pH 2 and it increased with increasing temperature. The adsorption kinetics followed the pseudo-second-order model and the adsorption isotherms fitted well to the Langmuir isotherm model with maximum adsorption capacities ranging from 606.06 to 666.67 mg/g. Effect of co-existing ions studies revealed that cations and anions had no significant effect on the adsorption of Cr(VI). Desorption studies also illustrated that the NC can be re-used up to 3 cycles. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier |
en_US |
dc.relation.ispartofseries |
Workflow;16178 |
|
dc.subject |
Graphene oxide |
en_US |
dc.subject |
Nanocomposites |
en_US |
dc.subject |
Polypyrrole |
en_US |
dc.subject |
Cyclodextrin |
en_US |
dc.subject |
Cr(VI) removal |
en_US |
dc.title |
High-performance towards removal of toxic hexavalent chromium from aqueous solution using graphene oxide-alpha cyclodextrin-polypyrrole nanocomposites |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Chauke, V., Maity, A., & Chetty, A. (2015). High-performance towards removal of toxic hexavalent chromium from aqueous solution using graphene oxide-alpha cyclodextrin-polypyrrole nanocomposites. http://hdl.handle.net/10204/8389 |
en_ZA |
dc.identifier.chicagocitation |
Chauke, VP, Arjun Maity, and A Chetty "High-performance towards removal of toxic hexavalent chromium from aqueous solution using graphene oxide-alpha cyclodextrin-polypyrrole nanocomposites." (2015) http://hdl.handle.net/10204/8389 |
en_ZA |
dc.identifier.vancouvercitation |
Chauke V, Maity A, Chetty A. High-performance towards removal of toxic hexavalent chromium from aqueous solution using graphene oxide-alpha cyclodextrin-polypyrrole nanocomposites. 2015; http://hdl.handle.net/10204/8389. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Chauke, VP
AU - Maity, Arjun
AU - Chetty, A
AB - Graphene oxide (GO) was functionalized with alpha cyclodextrin (aCD) through a covalent bond to form GO-aCD nanocomposites (NC). GO-aCD NC was further modified with polypyrrole (PPY) to afford an advanced GO-aCD-PPY NC for the removal of highly toxic Cr(VI) from water. The prepared GO-aCD-PPY NCs were successfully characterised with AT-FTIR, FE-SEM, HR-TEM, BET and XRD techniques. Adsorption experiments were performed in batch mode to determine optimum conditions that include temperature, pH, concentration of
Cr(VI) and contact time. It was deduced from the experiments that the adsorption of Cr(VI) by the GO-aCD-PPY NC is pH and temperature dependent, where optimum adsorption was achieved at pH 2 and it increased with increasing temperature. The adsorption kinetics followed the pseudo-second-order model and the adsorption isotherms fitted well to the Langmuir isotherm model with maximum adsorption capacities ranging from 606.06 to 666.67 mg/g. Effect of co-existing ions studies revealed that cations and anions had no significant effect on the adsorption of Cr(VI). Desorption studies also illustrated that the NC can be re-used up to 3 cycles.
DA - 2015-07
DB - ResearchSpace
DP - CSIR
KW - Graphene oxide
KW - Nanocomposites
KW - Polypyrrole
KW - Cyclodextrin
KW - Cr(VI) removal
LK - https://researchspace.csir.co.za
PY - 2015
SM - 0167-7322
T1 - High-performance towards removal of toxic hexavalent chromium from aqueous solution using graphene oxide-alpha cyclodextrin-polypyrrole nanocomposites
TI - High-performance towards removal of toxic hexavalent chromium from aqueous solution using graphene oxide-alpha cyclodextrin-polypyrrole nanocomposites
UR - http://hdl.handle.net/10204/8389
ER -
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en_ZA |