以设计合成的离子液体表面活性剂1-十六烷基-3-丙基咪唑溴盐为模板剂,正硅酸乙酯为硅源,通过水热合成法制备出了介孔MCM-41,结构表征表明其为孔道均一的六方有序结构,孔径3.28nm、比表面积967.08m2/g。研究了制备的MCM-41对有机染料亚甲基蓝的吸附性能,对此吸附过程进行了热力学和动力学分析。结果表明:当pH=9、吸附温度为35℃时吸附60min即达到吸附平衡,吸附量可达305.03mg/g。此吸附过程符合二级吸附动力学,属Freundlich等温吸附,吸附过程为吸热过程。
Mesoporous MCM-41 was prepared by hydrothermal synthesis method with self-designed and synthesized ironic liquid surfactant 1-hexadecyl-3-propylimidazolium bromide as templating agent and tetraethylorthosilicate as source of silicon.The structure characterization of the obtained MCM-41 indicated that the material possessed hexagonal pore structure with uniform channels,and its pore diameter and specific surface area were 3.24nm and 967.08m2/g,respectively.The adsorption properties of the prepared mesoporous MCM-41 for methylene blue were investigated,and the adsorption thermodynamics and kinetics were also analyzed.The results showed that the adsorption equilibrium was reached in 60 min under pH=9 and absorption temperature of 35℃,and the adsorption amount reached 305.03mg/g.The adsorption process belonged to Freundlich isothermal adsorption,conforming to the second-order adsorption kinetics,and the adsorption process was an endothermic process.
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基金资助
河南省科技攻关项目(162102210056);郑州市科技攻关项目(141PQYJS555);郑州轻工业大学博士研究基金项目(2020BSJJ018)
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