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采用溶剂热法合成了一种氮掺杂碳纳米片,研究了其对水溶液中亚甲蓝染料的吸附性能。研究结果表明,制备的氮掺杂碳纳米片具有高效吸附亚甲蓝染料的性能;溶液pH值对亚甲蓝在氮掺杂碳纳米片上的吸附有显著影响,碱性条件下亚甲蓝的平衡吸附量接近酸性条件下的2.5倍;亚甲蓝水溶液的初始浓度对平衡吸附有一定的影响,在低浓度的情况下随着亚甲蓝溶液初始浓度的增加平衡吸附量增大,当浓度达到一定程度后亚甲蓝平衡吸附量不再有显著增大;对水溶液中亚甲蓝染料的吸附动力学研究表明,吸附动力学数据符合伪二级动力学模型;平衡吸附研究结果表明,吸附等温线符合Langmuir吸附模型。
A nitrogen-doped carbon nanosheet was synthesized by solvothermal method. The adsorption of methylene blue on aqueous solution was studied. The results show that the prepared nitrogen-doped carbon nanosheets have the advantages of highly efficient adsorption of methylene blue dye; the solution pH has a significant effect on the adsorption of methylene blue on nitrogen-doped carbon nanosheets; under alkaline conditions, methylene blue The equilibrium adsorption capacity was close to 2.5 times of that under acidic conditions. The initial concentration of methylene blue aqueous solution had a certain influence on the equilibrium adsorption. At low concentration, the equilibrium adsorption capacity increased with the initial concentration of methylene blue solution. The adsorption kinetics of methylene blue dye in aqueous solution shows that the kinetic data of adsorption are in accordance with the pseudo-second-order kinetic model. The results of equilibrium adsorption show that adsorption Isotherms fit the Langmuir adsorption model.