Abstract In this work, graphene oxide aerogel (GOA) was synthesized by ice segregation induced self-assembly method. The characterization of GOA was studied by Fourier transform infrared spectroscopy, X-ray diffraction, Raman spectroscopy, transmission electron microscopy, scanning electron microscope, and Brunauer–Emmett–Teller specific surface area. Effects of contact time, pH, and initial concentration on the adsorption capacity of GOA were studied. The adsorption process fitted well with pseudo-second-order kinetic and Langmuir isotherm models with the maximum adsorption capacities for methylene blue and methyl orange of 480.76 and 55.56 mg/g, respectively.

中文翻译：

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氧化石墨烯气凝胶作为吸附剂去除水中染料的合成与应用

摘要 在这项工作中，采用冰分离诱导自组装方法合成了氧化石墨烯气凝胶（GOA）。GOA的表征通过傅里叶变换红外光谱、X射线衍射、拉曼光谱、透射电子显微镜、扫描电子显微镜和Brunauer-Emmett-Teller比表面积进行研究。研究了接触时间、pH 值和初始浓度对 GOA 吸附能力的影响。吸附过程与准二级动力学模型和朗缪尔等温线模型非常吻合，对亚甲蓝和甲基橙的最大吸附容量分别为 480.76 和 55.56 mg/g。