Fast and Considerable Adsorption of Methylene Blue Dye onto Graphene Oxide
Fast and Considerable Adsorption of Methylene Blue Dye onto Graphene Oxide
复制标题
氧化石墨烯上亚甲基蓝染料的快速且大量吸附
DOI：
10.1007/s00128-011-0304-1
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发表时间：
2011-07-01
影响因子：
2.7
通讯作者：
Zou, Bingsuo
中科院分区：
文献类型：
--
作者：
Zhang, Wenjie;Zhou, Chunjiao;Zou, Bingsuo
研究了氧化石墨烯对水溶液中亚甲基蓝染料的高效吸附。亚甲基蓝与氧化石墨烯之间的相互作用主要是良好的静电吸引作用。由于氧化石墨烯具有特殊的纳米结构和表面带负电荷的特性，亚甲基蓝分子很容易吸附在其上，在293 K下亚甲基蓝水溶液中，吸附数据可用Langmuir方程拟合，最大吸附量为1.939 mg/mg，吸附平衡常数为18.486 mL/mg。吸附量随溶液pH值的增加而增加（3-11），KCl对吸附量影响不大，吸附过程为放热过程。氧化石墨烯的快速和可观的吸附可以被视为一个潜在的吸附剂去除阳离子染料在废水处理过程中。
The quite efficient adsorption of methylene blue dye from an aqueous solution by graphene oxide was studied. The favorable electrostatic attraction is the main interaction between methylene blue and graphene oxide. As graphene oxide has the special nanostructural properties and negatively charged surface, the positively charged methylene blue molecules can be easily adsorbed on it. In the aqueous solution of methylene blue at 293 K, the adsorption data could be fitted by the Langmuir equation with a maximum adsorption amount of 1.939 mg/mg and a Langmuir adsorption equilibrium constant of 18.486 mL/mg. The adsorption amount increased with the increase of the solution pH (3–11), was not affected significantly by KCl under the examined condition and the adsorption process was exothermic in nature. The fast and considerable adsorption of graphene oxide could be regarded as a potential adsorbent for cationic dye removal in wastewater treatment process.