摘要
采用溶剂热法合成了金属-有机骨架材料NH_2-MIL-53(Al),对活化后的产物进行了粉末X射线衍射(PXRD)、扫描电子显微镜(SEM)及傅里叶变换红外光谱(FTIR)等表征,研究了其在水溶液中对双氯芬酸钠的吸附性能.实验结果表明,NH_2-MIL-53(Al)对双氯芬酸钠具有良好的吸附性能,对5 mg/L的双氯芬酸钠能在40 min内达到吸附平衡,且吸附动力学结果符合准二级动力学曲线,利用Langmuir模型和Freundlich模型拟合吸附等温线,结果表明Langmuir模型拟合效果更好.循环吸附实验结果表明NH_2-MIL-53(Al)具有良好的重复利用性.此外,结合ζ电位测试结果以及p H值对吸附效果的影响,对可能的吸附机理进行了阐述.
The metal-organic framework（MOF）material of NH_2-MIL-53（Al）was solvothermally synthesized,and characterized by powder X-ray diffraction（PXRD）,scanning electron microscopy（SEM）and Fourier transform infrared spectroscopy（FTIR）.The adsorption behavior of the as-prepared NH_2-MIL-53（Al）for diclofenac sodium（DCF）was studied in aqueous solution.The experimental results showed that NH_2-MIL-53（Al）had a high adsorption capacity on the target material and reach adsorption equilibrium in 40 min when the concentration of DCF was 5 mg/L.Furthermore,the adsorption kinetics of NH_2-MIL-53（Al）for DCF conformed to the pseudo second-order kinetics model.Langmuir model and Freundlich model were used to fit the adsorption isotherms,and the Langmuir model showed a better fit.The experiment of cyclic adsorption showed that NH_2-MIL-53（Al）had a good recycle performance.Moreover,the possible adsorption mechanism was demonstrated by the combination ofζpotential tests and adsorption effect experiments under different p H values.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2018年第2期206-211,共6页
Chemical Journal of Chinese Universities
基金
广东省自然科学基金项目(批准号:2016A030307048
2015A030313750)
广东省普通高校特色创新(自然科学类)项目(批准号:2014KTSCX169)
韶关市科技计划项目(批准号:210572)
广东省大学生攀登计划项目(批准号:pdjh2016b0458)资助~~
