التفاصيل البيبلوغرافية
| العنوان: |
Adsorption properties of a novel 3D graphene/MgO composite for heavy metal ions. |
| Alternate Title: |
一种新的三维石墨烯/MgO 复合物对重金属离子的吸附性能研究. (Chinese) |
| المؤلفون: |
Zhou, Ying, Liang, Chun-yan, Yu, Jin-gang, Jiang, Xin-yu |
| المصدر: |
Journal of Central South University; Apr2019, Vol. 26 Issue 4, p813-823, 11p |
| Abstract (English): |
A novel three-dimension (3D) graphene/MgO composite was synthesized through self-assembly and embedding MgO nanoparticle in reduced graphene in situ. Fourier transform infrared (FT-IR) spectroscopy, thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscope (TEM), powder X-raydiffraction (XRD) and X-rayphotoelectron spectroscopy(XPS) were employed to characterize the prepared 3D graphene/MgO composite. The adsorption performance of some metal ions on 3D graphene/MgO was investigated. The results showed that the adsorption capacity was greater than 3D graphene and the maximum adsorption capacity at 25 °C was found to be 358.96 mg/g, 388.4 mg/g and 169.8 mg/g for Pb2+, Cd2+ and Cu2+, respectively. The adsorption kinetic conformed to the pseudo-second-order kinetic model and the adsorption isotherm was well described by Langmuir model. The thermodynamic constants revealed that the sorption process was endothermic and spontaneous in nature. Based on the results of the removal of heavy metal ions from metal smelting wastewater, it can be concluded that the prepared 3D graphene/MgO composite is an effective and potential adsorbent. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
摘要: 通过水热法在石墨烯自组装和原位还原的过程中嵌入MgO 制备了一种新的三维石墨烯/MgO 复 合物。采用 FT-IR, TGA, SEM, TEM, XRD 和 XPS 等测试手段对制备的材料进行了表征。研究了 三维石墨烯/MgO 复合物对一些金属离子的吸附性能。研究结果表明复合物材料的吸附性能优于三 维石墨烯, 25°C 时对 Pb2+, Cd2+, Cu2+ 的最大吸附量分别为 358.96 mg/g, 388.4 mg/g 和 169.8 mg/g, 吸附过程符合准二级动力学和 Langmuir 等温吸附模型。热力学参数表明吸附过程是一个吸热自发的 过程。将三维石墨烯/MgO 复合物用于冶炼厂废水样中重金属离子的去除, 结果显示材料具有很好的 去除效果。 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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