Controllable reduction of graphene oxide by electron-beam irradiation
| Autor: | Ruobing Yi, Yu Yang, Gang Xu, De-Yuan Li, Minghong Wu, Liang Chen, Jia-Wei Mo |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Aqueous solution Graphene General Chemical Engineering Oxide 02 engineering and technology General Chemistry Epoxy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion law.invention chemistry.chemical_compound Adsorption Membrane Chemical engineering chemistry law visual_art visual_art.visual_art_medium Irradiation 0210 nano-technology |
| Zdroj: | RSC Advances. 9:3597-3604 |
| ISSN: | 2046-2069 |
| Popis: | The oxygen content of graphene oxide (GO) is directly related to its physical and chemical properties, such as hydrophilicity, suspension stability, adsorption, and ion-sieving ability of GO membranes. Here, a series of reduced GO (rGO) with C/O atomic ratios from 1.6 to 4.8 were prepared conveniently by electron-beam irradiation (EBI) with irradiation-dose control. Moreover, a single oxygen-containing group, i.e., epoxy or carbonyl, could be retained mainly in the rGO. The interlayer spacing of rGO could be changed from 9.6 A to 7.4 A through control of the oxygen content. The prepared rGO exhibited an excellent adsorption effect on Pb(II) ions, and the max adsorption capacity reached 194.76 mg g−1 for rGO with a low irradiation dose (5 kGy), which showed that the ratio of oxygen-containing groups is important for improving the adsorption of rGO in aqueous solution. These results indicated that highly efficient, environmentally friendly, and advanced EBI technology has good potential prospects for use in the large-scale production of rGO with precise control of the oxygen content. |
| Databáze: | OpenAIRE |
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