纳米MoO3对亚甲基蓝的吸附研究

Study on the adsorption of methylene blue by nano-MoO3

摘要:

以钼酸钠为原材料采用超声波法制备了纳米 MoO3，研究了纳米MoO3对亚甲基蓝的吸附性能．通过红外光谱、X射线光电子能谱仪、X射线粉末衍射仪、扫描电镜及能谱，研究了纳米MoO3对亚甲基蓝的吸附机理．研究结果表明：纳米MoO3对亚甲基蓝吸附的最大吸附容量为535.78 mg/g，其吸附类型为化学吸附，主要为亚甲基蓝中硫与钼络合成键吸附；根据吸附热力学研究，其吸附模型符合Langmuir等温吸附模型，符合准一级动力学模型．

Abstract:

Nano-MoO3 was prepared by ultrasonic method with sodium molybdate as raw material. The nano-MoO3 was studied by infrared spectroscopy， X-ray photoelectron spectroscopy， X-ray powder diffractometer， scanning electron microscope and energy spectrum. The maximum adsorption capacity of nano-MoO3 of methylene blue is 535.78 mg/g， and its adsorption type is chemical adsorption， mainly the complex bond between sulfur in methylene blue and molybdenum. According to the adsorption thermodynamics and thermodynamic study， the adsorption model conforms to the Langmuir isothermal adsorption model and quasi-first-order kinetic model， respectively.