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| 论文题目: | Synthesis of reduced graphene oxide/NiO nanocomposites for the removal of Cr(VI) from aqueous water by adsorption |
| 英文论文题目: | Synthesis of reduced graphene oxide/NiO nanocomposites for the removal of Cr(VI) from aqueous water by adsorption |
| 第一作者: | 张可心 |
| 英文第一作者: | Zhang, K. X. |
| 联系作者: | 于洪文 |
| 英文联系作者: | Yu, H. W. |
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| 发表年度: | 2018 |
| 卷: | 255 |
| 期: | |
| 页码: | 7-14 |
| 摘要: | In this work, we report a room-temperature approach to synthesizing reduced graphene oxidei/NiO (RGO/NiO) nanocomposites. The chemical structure of RGO/NiO nanocomposites were investigated by Transmission Electron Microscope (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray power diffraction (XRD). It is shown by the experiment that the RGO/NiO nanocomposites have strong capacity to absorb the hexavalent chromium ion (Cr (VI)), the maximum adsorption capacity of Cr (VI) on RGO/NiO nanocomposites at pH = 4 and T = 25 degrees C can reach 198 mg g(-1), higher than any other currently reported. The adsorption kinetic data were well described by a pseudo-second-order model. Both Freundlich and Langmuir isotherm models were applied to the experimental data analysis, and the latter proved to be a better fit. The pH value markedly affected the adsorption behavior of RGO/NiO nano composites, but the effect of temperature was insignificant. The probable mechanism of synergistic adsorption of Cr (VI) ions was considered. These results suggest that RGO/NiO nanocomposites have the potential to be applied in industrial wastewater treatment. (C) 2017 Elsevier Inc. All rights reserved. |
| 英文摘要: | In this work, we report a room-temperature approach to synthesizing reduced graphene oxidei/NiO (RGO/NiO) nanocomposites. The chemical structure of RGO/NiO nanocomposites were investigated by Transmission Electron Microscope (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray power diffraction (XRD). It is shown by the experiment that the RGO/NiO nanocomposites have strong capacity to absorb the hexavalent chromium ion (Cr (VI)), the maximum adsorption capacity of Cr (VI) on RGO/NiO nanocomposites at pH = 4 and T = 25 degrees C can reach 198 mg g(-1), higher than any other currently reported. The adsorption kinetic data were well described by a pseudo-second-order model. Both Freundlich and Langmuir isotherm models were applied to the experimental data analysis, and the latter proved to be a better fit. The pH value markedly affected the adsorption behavior of RGO/NiO nano composites, but the effect of temperature was insignificant. The probable mechanism of synergistic adsorption of Cr (VI) ions was considered. These results suggest that RGO/NiO nanocomposites have the potential to be applied in industrial wastewater treatment. (C) 2017 Elsevier Inc. All rights reserved. |
| 刊物名称: | Microporous and Mesoporous Materials |
| 英文刊物名称: | Microporous and Mesoporous Materials |
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| 参与作者: | Li, H. Y.,Xu, X. J.,Yu, H. W. |
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Synthesis of reduced graphene oxide/NiO nanocomposites for the removal of Cr(VI) from aqueous water
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