氧化石墨烯对硼的吸附研究：平衡、动力学及热力学研究
Investigation of boron adsorption by graphene oxide: equilibrium, kinetic, and thermodynamic studies.
作者信息
Önen Mehmet Fatih, Aydin Nalan Erdöl, Eksik Osman, Demirçivi Pelin, Saygili Gülhayat Nasun
机构信息
Department of Chemical Engineering, Faculty of Chemical and Metallurgical Engineering, İstanbul Technical University, İstanbul, Turkey.
Institute of Nanotechnology, Gebze Technical University, Gebze, Turkey.
出版信息
Turk J Chem. 2023 May 27;47(3):656-666. doi: 10.55730/1300-0527.3568. eCollection 2023.
Graphene oxide, which has a great application in industry, is one of the promising carbonous materials. Modified Hummers method was applied to synthesize graphene oxide. Characterization techniques showed that pure graphene oxide was successfully obtained. Its adsorptive properties were investigated by boron adsorption. The results were demonstrated that boron adsorption on graphene oxide was a pH-dependent process and maximum adsorption was achieved at pH 6 (0.98 mg g). Langmuir adsorption capacity was calculated as 3.92 mg g with = 0.99. The kinetic data brought to light that pseudosecond-order kinetic model was well described the experimental data ( = 0.99), and according to thermodynamic parameters, boron adsorption has spontaneous and endothermic nature (ΔH°15.47 kJ mol).
氧化石墨烯是一种很有前景的含碳材料，在工业上有很大的应用价值。采用改进的Hummers法合成氧化石墨烯。表征技术表明成功获得了纯氧化石墨烯。通过硼吸附研究了其吸附性能。结果表明，氧化石墨烯对硼的吸附是一个pH依赖过程，在pH 6时达到最大吸附量（0.98 mg/g）。Langmuir吸附容量计算为3.92 mg/g，相关系数R² = 0.99。动力学数据表明，准二级动力学模型能很好地描述实验数据（R² = 0.99），根据热力学参数，硼吸附具有自发和吸热性质（ΔH° = 15.47 kJ/mol）。
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