Comparative study of graphene oxide, activated carbon and carbon nanotubes as adsorbents for copper decontamination.
Comparative study of graphene oxide, activated carbon and carbon nanotubes as adsorbents for copper decontamination.
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DOI：
10.1039/c3dt32969k
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发表时间：
2013-03
影响因子：
4
通讯作者：
X. Ren;Jiaxing Li;X. Tan;Xiangke Wang
中科院分区：
文献类型：
--
作者：
X. Ren;Jiaxing Li;X. Tan;Xiangke Wang
本文对氧化石墨烯、多壁碳纳米管和活性碳三种不同的碳质材料净化铜(II)进行了比较研究。采用扫描电子显微镜、傅里叶变换红外光谱、N_2-BET比表面积分析和酸碱电位滴定等方法对三种炭素材料进行了详细的表征。此外，还研究了三种碳质材料对铜(II)的吸附与pH和铜(II)离子浓度的关系。利用恒电容模型，借助FITEQL4.0软件，确定了铜(II)在碳质材料上的适宜吸附表面反应。此外，还阐述了酸性官能团的比表面积和总浓度对三种炭质材料吸附去除铜(II)的影响。研究结果对预测表面改性碳材料的吸附容量具有重要意义。
This paper presents a comparative study of Cu(II) decontamination by three different carbonaceous materials, i.e., graphene oxide, multiwalled carbon nanotubes, and activated carbon. The three carbonaceous materials were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, N2-BET surface area analysis, and potentiometric acid-base titrations in detail. Also, Cu(II) adsorption on the three types of carbonaceous materials as a function of pH and Cu(II) ion concentration were investigated. The constant capacitance model was used to determine the appropriate surface reactions of Cu(II) adsorption on carbonaceous materials with the aid of FITEQL 4.0 software. In addition, how the surface area and the total concentration of acidic functional groups influencing the adsorption capacities of the three carbonaceous materials for Cu(II) removal were elucidated. The results have an important role in predicting the adsorption capacity of surface modified carbonaceous materials.