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Journal of Sol-Gel Science and Technology
Erschienen in: Journal of Sol-Gel Science and Technology 3/2016

01.03.2016 | Original Paper

Catechol-functionalized nanosilica for adsorption of germanium ions from aqueous media

verfasst von: Wei Cui, Shixing Wang, Jinhui Peng, Libo Zhang, Gengwei Zhang

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 3/2016

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Abstract

We prepared the catechol-functionalized nanosilica for adsorption of germanium (Ge) ions from aqueous media. The functionalized nanosilica was characterized by FTIR, TGA, TEM, BET, and XPS. The influence of pH, Ge initial concentration, and time of the adsorption process was investigated. Under the optimum condition, the maximum adsorption capacity of Ge ions was 0.048 mg m−2 at pH 4.5. The adsorption mechanism is the chelating interaction between hydroxyl and Ge(OH)4. The functionalized nanosilica was able to selectively adsorb Ge ions from tellurium(IV) and boron. Langmuir isotherm was found to better fit the experiment data rather than Freundlich isotherm. The kinetics of the adsorption process of Ge ions on the functionalized nanosilica was investigated using the pseudo-first-order and pseudo-second-order models, and the results indicated that the pseudo-second order equation model provided the best correlation with the experimental results.

Graphical Abstract

Vorheriger Artikel Formulation and evaluation of sparfloxacin emulsomes-loaded thermosensitive in situ gel for ophthalmic delivery
Nächster Artikel Injectable gel from squid pen chitosan for bone tissue engineering applications

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Metadaten
Titel
Catechol-functionalized nanosilica for adsorption of germanium ions from aqueous media
verfasst von
Wei Cui
Shixing Wang
Jinhui Peng
Libo Zhang
Gengwei Zhang
Publikationsdatum
01.03.2016
Verlag
Springer US
Erschienen in
Journal of Sol-Gel Science and Technology / Ausgabe 3/2016
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-015-3898-7

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