Adsorption of Lead(II) Ions from Aqueous Solution on Low-Temperature Exfoliated Graphene Nanosheets

被引：380

作者：

Huang, Zheng-Hong ^{[1
]}

Zheng, Xiaoyu ^{[2
]}

Lv, Wei ^{[2
]}

Wang, Ming ^{[1
]}

Yang, Quan-Hong ^{[2
]}

Kang, Feiyu ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, Adv Mat Lab, Beijing 100084, Peoples R China

[2] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

来源：

LANGMUIR | 2011年 / 27卷 / 12期

基金：

中国国家自然科学基金;

关键词：

ACTIVATED CARBON; ADSORBENTS; COPPER(II); STRENGTH; REMOVAL; PB(II); PH;

D O I：

10.1021/la200606r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Graphene nanosheets (GNSs) that were obtained by vacuum-promoted low-temperature exfoliation were used to adsorb lead ions from an aqueous system. The pristine and thermally modified GNSs were characterized with scanning electron microscopy observation and X-ray photoelectron spectroscopy analysis. It was interestingly found that the adsorption against lead ions was enhanced by heat treatment, although the oxygen complexes of GNSs showed a significant decrease. In addition, lead ion uptake resulted in an increase in the pH value of the solution. It is supposed that the Lewis basicity of GNSs is improved by heat treatment under a high vacuum, in favor of simultaneous adsorption of lead ions and protons onto GNSs.

引用

页码：7558 / 7562

页数：5

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