基于Cu-BTC骨架的Cu_(2)O-CuO复合材料的制备及吸其附性能  

Preparation and its adsorption properties of Cu_(2)O-CuO composite material based on Cu-BTC framework

作　　者：唐安宇 何曼丽 陈九玉 周鑫浩 王丙佳 王俊议 杨毅[1] TANG Anyu;HE Manli;CHEN Jiuyu;ZHOU Xinhao;WANG Bingjia;WANG Junyi;YANG Yi(School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse,Nanjing 210094,China;Department of Basic,Institute of PLA Army Engineering,Nanjing 210001,China)

机构地区：[1]南京理工大学环境与生物工程学院,江苏省化工污染控制与资源化重点实验室,江苏南京210094 [2]陆军工程大学基础部,江苏南京210001

出　　处：《中国粉体技术》2021年第3期80-88,共9页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:11805101;江苏省环保科研课题,编号:JSZCD 2018-044;江苏省凹土资源利用重点实验室开放课题,编号:HPK202001。

摘　　要：为了提高材料对放射性碘的吸附性能,在制备立方体和十二面体铜基均苯三甲酸(Cu-BTC)材料的基础上,通过调节煅烧气氛环境,获得更为疏松多孔的氧化亚铜-氧化铜(Cu_(2)O-CuO)复合材料。通过扫描电子显微镜、X射线衍射、红外光谱等手段对材料进行表征,发现所得材料分别为立方体和十二面体的Cu_(2)O-CuO,并依旧保留大部分Cu-BTC结构骨架。对碘离子的吸附实验结果显示,立方体和十二面体的Cu_(2)O-CuO饱和吸附容量分别能够达到49.72、91.91 mg/g。热力学和动力学吸附研究结果表明,2种形貌的Cu_(2)O-CuO均属于以化学吸附为主,符合Langmuir吸附模型的单分子层吸附。制备的Cu_(2)O-CuO能够在吸附时与碘离子生成CuI。吸附剂在弱酸条件吸附性能更强,干扰离子中,弱酸根离子会阻碍材料对碘离子的吸附,而强酸根离子则能一定程度上促进吸附,提升吸附剂吸附性能。In order to improve the adsorption performance of the material for radioactive iodine,by adjusting the calcination atmosphere,a more porous Cu_(2)O-CuO composite material was obtained on the basis of preparing cubic and dodecahedral Cu-BTC materials.Through SEM,XRD and FTIR characterization,we found the obtained materials are cubic and dodecahedral Cu_(2)O-CuO,respectively,and still retain most of the Cu-BTC structure framework.The results of adsorption experiments on iodide ions(I^(-))show that,the saturated adsorption capacities of the two morphologies(cube and dodecahedron)Cu_(2)O-CuO can reach respectively 49.72 mg/g and 91.91 mg/g.Thermodynamic and kinetic adsorption research results show that the two morphologies of Cu_(2)O-CuO belong to monolayer adsorption based on chemical adsorption and conform to the Langmuir adsorption model.The Cu_(2)O-CuO adsorbent can generate CuI during adsorption.The adsorbent has stronger adsorption performance under weak acid conditions.Among the interfering ions,weak acid ions will hinder the material’s adsorption of iodide ions,while strong acid ions can promote adsorption to a certain extent and improve the adsorption performance of the adsorbent.

关 键 词：金属有机骨架化合物 铜基均苯三甲酸 氧化亚铜-氧化铜 放射性碘吸附 

分 类 号：TB4[一般工业技术] X34[环境科学与工程—环境工程]