CTAB 插层石墨烯的合成及其在水中吸附 AR265 和 AO7 染料的应用。
Synthesis of CTAB intercalated graphene and its application for the adsorption of AR265 and AO7 dyes from water.
机构信息
Malaysia-Japan International Institute of Technology, Department of Environmental Engineering and Green Technology, University Technology Malaysia (UTM), Jalan Semarak, 54100 Kuala Lumpur, Malaysia; Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan.
Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
出版信息
J Colloid Interface Sci. 2017 May 1;493:51-61. doi: 10.1016/j.jcis.2017.01.015. Epub 2017 Jan 5.
Environmental applications of graphene (GN) are limited by the occurrence of aggregation. Herein, graphene oxide (GO) was synthesized, reduced to GN by ascorbic acid, and intercalated with cetyltrimethylammonium bromide (CTAB). GN-CTAB was characterized by Boehm's titration, N adsorption/desorption, Fourier transform infrared spectroscopy, Raman spectroscopy, Fluorescence spectrophotometry, X-ray diffraction and Scanning electron microscopy. Then, GN-CTAB was used for the adsorptive removal of acid red 265 (AR265) and acid orange 7 (AO7) dyes from water both under batch and column operation. Under batch operation, the effect of pH, adsorbent dosage, initial dye concentration, contact time and temperature on dyes adsorption were assessed. Adsorption isotherms, kinetics, and thermodynamics were analyzed systematically. Regarding the fixed bed operation, the effect of both the bed height and flow rate were studied and experimental results fitted to the Thomas and BDST models. Then, the bed loss capacity along five adsorption-regeneration cycles was determined in order to further approach the practical application of GN-CTAB for wastewater treatment, namely for the removal of dyes.
石墨烯（GN）在环境中的应用受到聚集的限制。在此，合成了氧化石墨烯（GO），并用抗坏血酸将其还原为 GN，并与十六烷基三甲基溴化铵（CTAB）插层。通过Boehm 滴定、N 吸附/解吸、傅里叶变换红外光谱、拉曼光谱、荧光分光光度法、X 射线衍射和扫描电子显微镜对 GN-CTAB 进行了表征。然后，GN-CTAB 用于在批处理和柱操作两种条件下从水中吸附去除酸性红 265（AR265）和酸性橙 7（AO7）染料。在批处理操作中，评估了 pH 值、吸附剂用量、初始染料浓度、接触时间和温度对染料吸附的影响。系统分析了吸附等温线、动力学和热力学。关于固定床操作，研究了床层高度和流速的影响，并将实验结果拟合到 Thomas 和 BDST 模型中。然后，确定了五个吸附-再生循环过程中床层的损失容量，以便进一步探讨 GN-CTAB 在废水处理中的实际应用，即去除染料。
Zotero 插件