Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, PR China.
Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States.
J Hazard Mater. 2017 Sep 5;337:27-33. doi: 10.1016/j.jhazmat.2017.05.002. Epub 2017 May 3.
A novel three-dimensional crumpled graphene oxide/cellulose nanocrystals (GO/CNCs) composite was successfully synthesized and firstly used as adsorbent for the removal of ionic liquid [BMIM][Cl] from aqueous solution. The 3D crumpled structure and abundant oxygen of the functional groups on GO/CNCs composite can provide more chance for the sorption of [BMIM][Cl] compared with CNCs and GO, respectively. Therefore, a series of batch experiments were carried out to evaluate the adsorptive property of 3D GO/CNCs composite towards [BMIM][Cl], such as the GO mass content, the pH value and contact time. The results showed that pseudo-second-order kinetic model and Eovlich model were well fitted with the sorption kinetic. The isotherm adsorption data indicated that it was better described by Langmuir model, with the maximum sorption capacity of 0.455mmol/g. This work provides a facile method for the preparation of 3D structure adsorbent from graphene oxide and cellulose nanocrystals which has high adsorption capacity of [BMIM][Cl] in aqueous solution.
一种新型的三维褶皱氧化石墨烯/纤维素纳米晶体（GO/CNCs）复合材料被成功合成，并首次用作吸附剂，从水溶液中去除离子液体[BMIM][Cl]。与 CNCs 和 GO 相比，GO/CNCs 复合材料的三维褶皱结构和丰富的含氧官能团为[BMIM][Cl]的吸附提供了更多的机会。因此，进行了一系列批实验来评估 3D GO/CNCs 复合材料对[BMIM][Cl]的吸附性能，如 GO 的质量含量、pH 值和接触时间。结果表明，拟二级动力学模型和 Eovlich 模型很好地拟合了吸附动力学。等温吸附数据表明，Langmuir 模型对其描述更好，最大吸附容量为 0.455mmol/g。这项工作为从氧化石墨烯和纤维素纳米晶体制备具有高吸附容量的[BMIM][Cl]水溶液三维结构吸附剂提供了一种简便的方法。
