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.

发表年度:

2018

卷:

225

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.

刊物名称:

Microporous and Mesoporous Materials

英文刊物名称:

Microporous and Mesoporous Materials

参与作者:

Li, H. Y.,Xu, X. J.,Yu, H. W.