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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Preparation of a porous graphene oxide/alkali lignin aerogel composite and its adsorption properties for methylene blue
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Preparation of a porous graphene oxide/alkali lignin aerogel composite and its adsorption properties for methylene blue

机译：制备多孔石墨烯氧化物/碱木质素气凝胶复合物及其对亚甲基蓝的吸附性能

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Herein, a three-dimensional porous graphene oxide/alkali lignin aerogel composite was prepared by a simple green method, and its adsorption performance for methylene blue (MB) in water was studied. The graphene oxide/alkali lignin aerogel composite (GO-AL aerogel) was characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and the BET surface area. The adsorption kinetics study showed that the adsorption process conformed to the second-order kinetic model and this process was chemical adsorption. It was also found that intrapartide diffusion was not the only rate control step in the adsorption process. The adsorption isotherm study showed that the adsorption process conforms to the Langmuir isotherm adsorption model and the process was a single layer adsorption. The maximum adsorption capacity of MB on GO-AL aerogel was 1185.98 mg/g, at 303 K. Adsorption thermodynamics studies showed that adsorption process was a spontaneous endothermic process and the disorder increased during the adsorption process. Overall, this study indicated the GO-AL aerogel could be an eco-friendly, cost-effective and recyclable adsorbent for the removal of dyes from water. (C) 2019 Elsevier B.V. All rights reserved.
机译：这里，通过简单的绿色方法制备三维多孔石墨烯氧化物/碱木质素气体复合材料，研究了水中亚甲基蓝（MB）的吸附性能。通过扫描电子显微镜（SEM），傅里叶变换红外光谱（FT-IR），X射线衍射（XRD），X射线光电子体光谱（XP），将石墨烯氧化物/碱木质素气凝胶复合材料（Go-Al气凝胶）特征在于，傅立叶衍射（XRD），X射线光电子能谱（XPS） ，拉曼光谱和BET表面积。吸附动力学研究表明，吸附过程符合二阶动力学模型，该方法是化学吸附。还发现，全腹苷散射不是吸附过程中唯一的速率控制步骤。吸附等温线的研究表明，吸附过程符合兰梅尔等温吸附模型，该方法是单层吸附。 MB ON Go-Al气凝胶的最大吸附容量为1185.98mg / g，303k.吸附热力学研究表明，吸附过程是一种自发的吸热过程，并且在吸附过程中的病症增加。总体而言，这项研究表明，Go-Al气凝胶可以是一种环保，成本效益和可回收的吸附剂，用于从水中除去染料。 （c）2019 Elsevier B.v.保留所有权利。

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