UIO-67材料的制备及其在水溶液中吸附亚甲基蓝染料

Preparation of UIO-67 Materials and Adsorption for Methylene Blue in Aqueous Solution

采用水热法制备UIO-67材料,使用X-射线粉末衍射仪、扫描电子显微镜和比表面积与孔隙度分析仪等手段对其进行结构表征。采用紫外可见分光光度法设计了单因素吸附实验,对UIO-67材料在水溶液中吸附亚甲基蓝染料进行研究。UIO-67材料在水溶液中吸附亚甲基蓝的最佳条件为:初始浓度为4μg/m L,UIO-67材料用量为10 mg和溶液p H7. 03。通过动力学模型和热力学模型分析整个吸附过程,结果表明UIO-67材料在水溶液中吸附亚甲基蓝的过程符合二级动力学模型和Freundlich模型。

UIO-67 Materials were prepared by hydrothermal method and confirmed by X-ray powder diffraction,scanning electron microscope and specific surface area and porosity analyzer.The adsorption for methylene blue in aqueous solution by UIO-67 materials was investigated by UV-Vis method.The best adsorption conditions of UIO-67 materials for methylene blue in aqueous solution were obtained as follows:the initial concentration of methylene blue was 4μg/mL,the content of UIO-67 materials was 10 mg and the pH value was 7.03.The adsorption process of methylene blue in aqueous solution was analyzed by kinetic model and thermodynamic model.The adsorption process of methylene blue in aqueous solution by UIO-67 materials was in accordance with the second-order kinetic model and Freundlich model.