摘要
以改进的Hummers法合成的氧化石墨烯为自组装原料,通过微波加热的方式制备三维多孔石墨烯材料。并采用场发射扫描电子显微镜、傅立叶红外光谱仪、X射线衍射仪对石墨、氧化石墨烯、三维多孔石墨的微观形貌和内部结构进行表征分析。以亚甲基蓝为吸附质、三维多孔石墨烯为吸附剂,研究其吸附性能。结果表明,三维多孔石墨烯材料的最大吸附量为18.0 mg·g^(-1),去除率94.63%。通过对其动力学和热力学分析可知,三维多孔石墨烯对亚甲基蓝的吸附行为适合用Langmuir模型和二级动力学模型来描述。
In the experiment,three dimensional porous grapheme was prepared by the microwave method using graphene oxide synthesized by the improved Hummers method as the self-assembly material.The microscopic morphology and internal structure of graphite,graphene oxide,and porous graphite were characterized and analyzed by field emission scanning electron microscope,Fourier infrared spectrometer,and X-ray diffractometer.And using methylene blue as the adsorbate and three-dimensional porous graphene as the adsorbent,the adsorption performance was studied.The results show that the maximum adsorption capacity of porous graphene material reaches 11.0 mg·g^(-1),and the removal efficiency can reach 92.47%.Through kinetic and thermodynamic analysis,it can be known that the adsorption behavior of methylene blue over porous graphene is suitable to be described by the Langmuir model and the second-order kinetic model.
作者
白瑞
白雪
慕苗
高雯雯
卢翠英
Bai Rui;Bai Xue;Mu Miao;Gao Wenwen;Lu Cuiying(School of Chemistry and Chemical Engineering,Yulin University,Yulin 719000,Shaanxi,China)
出处
《工业催化》
CAS
2021年第4期42-46,共5页
Industrial Catalysis
基金
国家自然科学基金(52062047)
陕西省科技厅项目(2019SF-273)
陕西省教育厅重点科学研究计划(重点实验室)(20JS162)
榆林市科技局项目(CXY-2020-006)。
关键词
催化化学
多孔石墨烯
亚甲基蓝
吸附
动力学
热力学
catalytic chemistry
porous graphene
methylene blue
adsorption
kinetic
thermodynamic
