Adsorption of Nickel Ions on Oxygen‐Functionalized Carbons

Adsorption of Nickel Ions on Oxygen‐Functionalized Carbons
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氧功能化碳上镍离子的吸附

DOI:
10.1002/ceat.201500694
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发表时间:
--
影响因子:
2.1
通讯作者:
B.J.M. Etzold
B.J.M. Etzold
中科院分区:
工程技术4区
文献类型:
--
作者:
A.M. Kern;B. Zierath;J. Haertlé;T. Fey;B.J.M. Etzold

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研究了镍(II)离子在原始和湿化学氧化的微孔碳上的吸附。所得氧官能团的性质和酸性通过程序升温脱附和零电荷点测量来表征。氧化预处理强烈影响所得高亲和力Langmuir型吸附平衡的最大镍离子吸附容量。对于氧含量为12.5 mmol g-1的碳,最大可获得7.5 wt %的负载量。离子吸收量与表面氧含量呈线性关系。在动力学研究中,可以证明在室温下镍的吸收是一个缓慢的过程,并且吸附时间与氧含量、碳类型和镍负载无关。
The adsorption of nickel(II) ions on pristine and wet‐chemically oxidized microporous carbons is studied. The nature and acidity of the resulting oxygen functional groups are characterized by temperature‐programmed desorption and point of zero charge measurements. The maximal nickel ion adsorption capacity of the resulting high‐affinity Langmuir‐type adsorption equilibrium is strongly influenced by the oxidative pretreatment. At maximum, loadings of 7.5 wt % could be obtained for carbons showing oxygen content of 12.5 mmol g−1. A linear correlation of the ion uptake with the surface oxygen content could be deduced. In a kinetic study, it could be proved that the uptake of nickel at room temperature is a slow process and that the time for adsorption is independent of oxygen content, carbon type, and nickel loading.
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