Thiol-functionalized magnetite/graphene oxide hybrid as a reusable adsorbent for Hg(2+) removal

A thiol-functionalized magnetite/graphene oxide (MGO) hybrid as an adsorbent of Hg(2+) was successfully synthesized by a two-step reaction. It exhibited a higher adsorption capacity compared to the bare graphene oxide and MGO due to the combined adsorption of thiol groups and magnetite nanocrystals....

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Detalles Bibliográficos
Autores principales: Bao, Jian, Fu, You, Bao, Zhihao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2013
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3842736/
https://www.ncbi.nlm.nih.gov/pubmed/24252617
http://dx.doi.org/10.1186/1556-276X-8-486
Descripción
Sumario:A thiol-functionalized magnetite/graphene oxide (MGO) hybrid as an adsorbent of Hg(2+) was successfully synthesized by a two-step reaction. It exhibited a higher adsorption capacity compared to the bare graphene oxide and MGO due to the combined adsorption of thiol groups and magnetite nanocrystals. Its capacity reached 289.9 mg g(-1) in a solution with an initial Hg(2+) concentration of 100 mg l(-1). After being exchanged with H(+), the adsorbent could be reused. The adsorption of Hg(2+) by the thiol-functionalized MGO fits well with the Freundlich isotherm model and followed pseudo-second-order kinetics.

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