锌铜多孔碳复合材料制备及其吸附碘研究  

Preparation and iodine adsorption properties of zinc-copper porous carbon materials

作　　者：李智颖 顾傲天 杨毅[1] Li Zhiying;Gu Aotian;Yang Yi(School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学环境与生物工程学院,江苏南京210094

出　　处：《南京理工大学学报》2023年第3期404-411,共8页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金(11805101,51908240);中央高校基本科研业务费专项资金(30921013110);江苏省省级生态环境科研项目(2022017);江苏省凹土资源利用重点实验室开放课题(HPK202001)。

摘　　要：为了提升吸附材料对放射性碘的去除效果,以溶剂热法制备了锌铜双金属有机框架材料(Zn/Cu BTC),并以此为模板可控热解得到了具有高效吸附性能的锌铜纳米多孔碳(Zn/Cu@NPC)材料。使用扫描电子显微镜(SEM)、X射线粉末衍射(XRD)和比表面积分析等手段对材料的形貌结构、物化性质进行表征。结果表明:热解得到的Zn/Cu@NPC保持了Zn/Cu BTC的正八面体拓扑结构,表面出现氧化锌(ZnO)纳米颗粒,过渡金属锌的引入有效提升了材料比表面积。Zn/Cu@NPC表现出优异的碘离子吸附性能,吸附容量为212.5 mg/g,是单金属Cu@NPC吸附容量的3.99倍。该材料耐酸碱性、选择吸附性能良好,且再生循环吸附5次后吸附容量可保持首次吸附的90%。In order to improve the removal efficiency of radioactive iodine by adsorption materials,a zinc-copper bimetallic organic framework material(Zn/Cu BTC)is prepared using a solvothermal method,and a zinc-copper nanoporous carbon(Zn/Cu@NPC)material with efficient adsorption performance is obtained through controlled pyrolysis using this template.The morphology,structure and physicochemical properties of the materials are characterized by scanning electron microscope(SEM),X-ray powder diffraction(XRD)and specific surface area analysis.The results show that the Zn/Cu@NPC maintained an ortho-octahedral topology as Zn/Cu BTC after pyrolysis,ZnO nanoparticles appeared on the surface,and the introduction of transition metal Zn effectively increased the specific surface area of the material.Zn/Cu@NPC has excellent iodine anions adsorption performance,and the adsorption capacity is 212.5 mg/g,which is 3.99 times that of single metal [e-mail] material has good acid and alkali resistance,good selective adsorption performance and after regeneration cycle adsorption 5 times the adsorption capacity could maintain 90%of the first adsorption.

关 键 词：锌铜多孔碳材料 吸附材料 放射性碘 溶剂热法 金属有机框架 可控热解 扫描电子显微镜 X射线粉末衍射 

分 类 号：X591[环境科学与工程—环境工程]