α-MnO_2纳米线的合成及对刚果红的吸附热力学、平衡研究

Synthesis of α-MnO_2 nanowires and its adsorption thermodynamics and equilibrium study on Congo red

通过水热一步合成了α-MnO2纳米线,采用静态吸附法系统研究了α-MnO2对刚果红的吸附平衡曲线及热力学,并且计算出了有关的参数。结果表明,刚果红在α-MnO2上的吸附符合Langmuir等温吸附模型,最大吸附量达到了173.61 mg/g。热力学参数表明,刚果红在α-MnO2上的吸附是一个吸热的、自发的过程。

α-MnO2 Nanowires have been synthesized via facile one-step hydrothermal route. Batch method was used to investigate the isotherms and thermodynamics of Congo red onto α-MnO2, and the adsorption relational constants were calculated. The results showed that Langmuir equation had better fitness than Freudlich equation in isotherm adsorption process,and the maximum adsorption amount was calculated to be 173.61 mg/g. The calculated thermodynamic parameters showed that the adsorption of Congo red was endothermic and was feasible and spontaneous.