通过十二烷基硫酸钠功能化氧化石墨烯增强从水溶液中去除镍（II）离子的效果。

Salihi Elif Çalışkan, Wang Jiabin, Coleman Daniel J L, Šiller Lidija

School of Chemical Engineering and Advanced Materials, Newcastle University, Newcastle upon Tyne, UK; Faculty of Pharmacy, Department of Basic Pharmaceutical Sciences, Marmara University, Haydarpasa, Istanbul, Turkey.

School of Chemical Engineering and Advanced Materials, Newcastle University , Newcastle upon Tyne , UK.

Sep Sci Technol. 2016 May 23;51(8):1317-1327. doi: 10.1080/01496395.2016.1162172. Epub 2016 Mar 22.

In this paper, a one-pot and easy-to-handle method at room temperature without additional chemicals for the modification of graphene oxide (GO) with surfactant is found. Removal of nickel (II) ions from aqueous solutions by GO and surfactant (sodium dodecyl sulphate) modified graphene oxide (SDS-GO) was studied spectrophotometrically at room temperature as a function of time, initial concentration and pH. Adsorption capacity of the adsorbent was increased dramatically (from 20.19 to 55.16 mg/g found by Langmuir model) due to the functionalization of the surface by SDS. The driving force of the adsorption of Ni(II) ions is electrostatic attraction and Ni(II) ions adsorbed on the GO surface chemically besides ion exchange.

本文发现了一种在室温下无需额外化学试剂、一锅法且易于操作的用表面活性剂修饰氧化石墨烯（GO）的方法。在室温下，通过分光光度法研究了GO和表面活性剂（十二烷基硫酸钠）修饰的氧化石墨烯（SDS-GO）从水溶液中去除镍（II）离子的情况，该过程是时间、初始浓度和pH的函数。由于SDS对表面的功能化作用，吸附剂的吸附容量显著提高（根据朗缪尔模型，从20.19 mg/g提高到55.16 mg/g）。Ni（II）离子吸附的驱动力是静电吸引，并且除了离子交换外，Ni（II）离子还化学吸附在GO表面。