铟基MOFs制备及对废水中亚甲基兰吸附性能的研究  

Preparation of Indium-based MOFs and adsorption properties for methylene blue in wastewater

作　　者：张帆 赵瑞红[1] 王晓艳 薛志伟 王琳硕 ZHANG Fan;ZHAO Rui-hong;WANG Xiao-yan;XUE Zhi-wei;WANG Lin-shuo(School of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China)

机构地区：[1]河北科技大学化学与制药工程学院,河北石家庄050018

出　　处：《现代化工》2021年第3期196-201,共6页Modern Chemical Industry

摘　　要：以水合硝酸铟、N,N-二甲基甲酰胺、对苯二甲酸及衍生物为原料,柠檬酸钠溶液为调节剂,采用溶剂热法合成MIL-68(In)、NH_(2)-MIL-68(In)和MIL-68(In)-SC 3种金属-有机骨架材料,通过XRD、BET、SEM、TEM、FI-IR等测试技术对其进行表征;研究了3种材料对染料废水中亚甲基蓝(MB)的吸附性能,考察了吸附时间和溶液p H对吸附过程的影响。结果表明,柠檬酸钠可提高合成材料的比表面积和孔容;加柠檬酸钠调节的MIL-68(In)-SC对MB的吸附性能高于MIL-68(In)、NH_(2)-MIL-68(In);合成材料对MB的吸附动力学符合准二级动力学方程;吸附过程符合Langmuir的单分子层吸附;经无水乙醇解析,合成材料重复利用再生性能良好,对染料废水中MB的脱除具有良好的应用前景。Three kinds of metal-organic frameworks(MOFs)materials,including MIL-68(In),NH_(2)-MIL-68(In)and MIL-68(In)-SC,are prepared through solvothermal method with Indium nitrate hydrate,N,N-dimethylformamide,terephthalic acid and its derivatives as raw materials,and sodium citrate solution as a regulator.The samples are characterized by XRD,BET,SEM,TEM,FI-IR and other testing technologies.Their adsorption performance to methylene blue(MB)in dye wastewater are tested,and the effects of adsorption time and solution p H on the adsorption process are investigated.Results show that sodium citrate can increase specific surface area and pore volume of synthesized MOFs.Adsorption performance of MIL-68(In)-SC to MB that is adjusted by sodium citrate is higher than that of MIL-68(In)and NH_(2)-MIL-68(In).Adsorption kinetics of MOFs to MB conforms to quasi-second-order kinetic equations and the adsorption process conforms to Langmuir’s monolayer adsorption.After treated by absolute ethanol,the synthesized MOFs have good recycling performance,showing a good application prospects for the removal of MB from dye wastewater.

关 键 词：金属有机骨架材料 柠檬酸钠 亚甲基蓝 合成 吸附 

分 类 号：TQ09[化学工程]