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 Cu@NPC.The 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.
作者
李智颖
顾傲天
杨毅
Li Zhiying;Gu Aotian;Yang Yi(School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《南京理工大学学报》
CAS
CSCD
北大核心
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)。
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
zinc-copper porous carbon material
sorbent material
radioactive iodine
solvothermal method
metal-organic framework
controlled pyrolysis
scanning electron microscope
X-ray powder diffraction
作者简介
李智颖(1998-),女,硕士,主要研究方向:环境功能材料,E-mail:1192300153@qq.com;通讯作者:杨毅(1973-),男,博士,研究员,主要研究方向:环境功能材料,E-mail:yangyi@njust.edu.cn。
