苯并咪唑基金属有机骨架/氧化石墨烯复合材料对罗丹明B的吸附

Adsorption of rhodamine B by benzimidazole-based metal-organic framework/graphene oxide composites

通过对溶剂热“一锅法”合成中碱性溶剂的调整,成功制备了2种形貌不同的Cd苯并咪唑基金属有机骨架(Cd-MOF)与氧化石墨烯(GO)的复合材料,利用扫描电子显微镜(SEM)、X射线粉末衍射(XRD)、X射线光电子能谱(XPS)、紫外可见吸收光谱(UV-Vis)和傅里叶红外光谱(FT-IR)对复合材料的结构和性能进行了表征,并研究了其对水中罗丹明B(rhodamine B,RhB)的吸附性能。结果表明:GO的加入增强了Cd-MOF在水中的稳定性,提高了吸附能力;当溶液pH为3.5,吸附时间为60 min时,吸附率可达约95%。

In this work,two different morphologies of composites with Cd(Ⅱ)benzimidazole-derived metal-organic framework(MOF)and graphene oxide(GO)were successfully synthesized by adjusting the alkali environments in the one-pot solvothermal process.The structures and properties of these composites were characterized using scanning electron microscopy(SEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),UV-visible absorption spectra(UV-Vis),and FT-IR.The adsorption performance of these composites for rhodamine B(RhB)in water was studied.The results showed that GO and Cd-MOF were successfully combined,and the addition of GO enhanced the stability of Cd-MOF in water and improved its adsorption capacity.When the pH value of the solution was 3.5 and the adsorption time was 60 min,the adsorption rate could reach ca.95%.