摘要
在溶剂热条件下,以H6P2Mo18O62、对苯二甲酸(H2BDC)、4,4'-联吡啶(Bipy)和硝酸锌为原料构筑了1个三维金属有机骨架复合材料H_6P_2Mo_(18)O_(62)/Zn(BDC)(Bipy)_(0.5),并采用红外光谱(IR)、X射线衍射(XRD)、扫描电子显微镜(SEM)、热重分析(TG)、N2吸附-脱附等手段对产物进行了表征.同时,研究了产物对水溶液中亚甲基蓝(MB)的吸附性能,并探讨了MB初始p H值、初始浓度和温度对吸附量的影响.结果表明,产物的等温吸附模型符合Langmuir等温吸附模型,动力学符合拟二级动力学.H_6P_2Mo_(18)O_(62)/Zn(BDC)(Bipy)_(0.5)对亚甲基蓝的吸附是自发和放热的,此外,产物对甲基紫、罗丹明B、孔雀石绿等阳离子染料也具有良好的吸附性能.
By employing the H6P2Mo18O62,terephthalic acid(H2BDC),4,4'-bipyridine(Bipy) to assemble with Zn2+ion, a three-dimensional( 3D) metal organic framework composite, named H6P2Mo(18)O(62)/Zn(BDC)(Bipy)(0.5),was synthesized. The composition,structure,morphology,stability and toleration of H6P2Mo(18)O(62)/Zn(BDC)(Bipy)(0.5)were characterized by X-ray powder diffraction pattern( XRD),Fourier transform infrared( FTIR) spectrum,scanning electron microscopy( SEM),thermogravimetric( TG) analysis and N2adsorption-desorption analysis. The adsorption of methylene blue( MB) onto H6P2Mo(18)O(62)/Zn(BDC)(Bipy)(0.5)in aqueous solution was studied. The effects of the experimental parameters including the temperature,the initial p H value and initial concentration of methylene blue solution were discussed. The experimental data could be well described by the Langmuir equations and pseudo-second-order kinetic model.The adsorption process of methylene blue on the composite was spontaneous and exothermic. Furthermore,we also explored the adsorption properties of H6P2Mo18O62/Zn(BDC)( Bipy)0.5to methyl violet,malachite green,rhodamine B,and methyl orange. The results indicated that this new absorbent showed better adsorption performance towards cationic dyes.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2016年第9期1596-1604,共9页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21171053)
湖北师范大学研究生创新科研基金(批准号:20160107)
湖北省自然科学基金重点项目(批准号:2014CFA131)资助~~