一种新型氧化石墨烯/β-氢氧化铁复合材料的制备及其对水溶液中铜离子的吸附行为。
Fabrication of a novel graphene oxide/β-FeOOH composite and its adsorption behavior for copper ions from aqueous solution.
作者信息
Jiang Tingshun, Yan Lu, Zhang Lei, Li Yingying, Zhao Qian, Yin Hengbo
机构信息
School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, P. R. China.
出版信息
Dalton Trans. 2015 Jun 14;44(22):10448-56. doi: 10.1039/c5dt01030f.
A graphene oxide (GO)/β-FeOOH composite was prepared by the liquid insert method and was characterized by XRD, FT-IR, SEM and TEM. The adsorption capacity of the composite was evaluated by the removal of copper ions (Cu(2+)) from aqueous solution. The effect of initial pH, contact time and absorbent dose on the removal efficiency of Cu(2+) was investigated by batch experiments. Langmuir and Freundlich models were employed to describe the adsorption equilibrium. The adsorption kinetics was investigated by both the pseudo-first-order and pseudo-second-order kinetics models. The results showed that the GO/β-FeOOH composite exhibited excellent adsorption capacity for Cu(2+) and under the optimum experimental conditions, the removal rate of Cu(2+) can reach ca. 93.8%. The adsorption isotherm was a good fit with the Langmuir model and the adsorption process was described by the pseudo-second-order kinetics model.
采用液相插入法制备了氧化石墨烯（GO）/β-氢氧化铁（β-FeOOH）复合材料，并通过X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对其进行了表征。通过从水溶液中去除铜离子（Cu(2+)）来评估该复合材料的吸附容量。通过分批实验研究了初始pH值、接触时间和吸附剂用量对Cu(2+)去除效率的影响。采用朗缪尔（Langmuir）和弗伦德利希（Freundlich）模型描述吸附平衡。通过准一级动力学模型和准二级动力学模型研究吸附动力学。结果表明，GO/β-FeOOH复合材料对Cu(2+)表现出优异吸附容量，在最佳实验条件下，Cu(2+)的去除率可达约93.8%。吸附等温线与朗缪尔模型拟合良好，吸附过程由准二级动力学模型描述。
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