GRAPHENE OXIDE FUNCTIONALIZED BY ETHYLENE DIAMINE TETRAACETIC ACID (EDTA) BY A HYDROTHERMAL PROCESS AS AN ADSORBENT FOR NICKEL IONS
Source abstract
Abstract
"Graphene oxide (GO) from sugar cane bagasse (SCB/F) was treated with EDTA to produce modified GO (EGO) by a hydrothermal preparation reaction. Raman spectra showed an intensity ratio of ID/IG for SCB/F and EGO8:1 (EDTA:GO 8:1) of 0.598 and 0.391, respectively. FTIR spectra confirmed the introduction of nitrogen-containing groups into the SCB/F backbone. SEM analysis demonstrated the porosity character for the sample. The TGA/DTA results implied the EGO8:1 sample was less thermally stable than SCB/F. The Ni2+ adsorption study revealed a steadily increasing adsorption of Ni2+ until 45 min, with no noticeable increase in adsorption after that. The results of kinetic modeling, adsorption isotherms, and thermodynamic parameters showed that the pseudo-second-order models gave a better fit to the adsorption data of the SCB/F and EGO samples. Also, the adsorption data fitted the Langmuir model best, and the negative values of G indicated that the sorption process was spontaneous."
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Research context
OpenAlex topics: Graphene and Nanomaterials Applications · Supercapacitor Materials and Fabrication · Graphene research and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
National Research Centre, Cellulose and Paper Department, 33 El-Bohouth Str., Dokki, P.O. 12622, Giza, Egypt
References (34)
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