采用水热合成法制备镍基金属有机骨架材料(Ni-MOFs),然后以其为载体,采用溶液共混法制备Ni-MOFs@GO复合材料。采用傅里叶红外光谱仪和扫描电镜对其结构和形貌进行了表征。以亚甲基蓝(MB)为目标污染物,考察了Ni-MOFs与GO配比[m(Ni-MOFs):m(GO)]、MB初始浓度和Ni-MOFs@GO用量对MB吸附的影响,并对其吸附动力学和吸附等温线类型进行了探讨。结果表明,当m(Ni-MOFs):m(GO)为5:1,MB初始浓度为25mg/L,Ni-MOFs@GO用量为0.6g/L时,对MB的吸附容量为243.898mg/g。吸附过程符合准二级动力学模型(R2>0.999);在25℃条件下,Ni-MOFs@GO对MB平衡吸附量为235.373mg/g。吸附等温线拟合表明,Freundlich(R2F>0.779)模型能较好地描述MB的吸附行为。
Nckel based organic framework (Ni-MOFs) were prepared firstly by hydrothermal synthesis.Secondly,using the Ni-MOFs as carrier to obtain Ni-MOFs@GO composites by solution blending method.After that,the structure and morphology were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM).Finally,selecting methylene blue (MB) as target pollutant,the effects of the ratio of Ni-MOFs to GO,initial concentration of MB and amount of Ni-MOFs@GO on the adsorption of MB were investigated.Adsorption kinetics and adsorption isotherm types were also discussed.The results showed that the adsorption capacity of MB was 243.898mg/g when the ratio of m(Ni-MOFs) to m(GO) was 5:1,initial concentration of MB was 25mg/L,and the dosage of Ni-MOFs@GO was 0.6g/L.The adsorption process conformed to the quasi-second-order kinetic model (R2>0.999),and the equilibrium adsorption capacity to MB was 235.373mg/g at 25℃.Freundlich model (R2F>0.779) described the adsorption behavior of MB well.
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基金资助
辽宁省教育厅科学研究经费项目(JFL202015403)
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