磁性MOFs材料Fe_(3)O_(4)@SiO_(2)@UiO-66-SO_(3)H对Co(Ⅱ)的吸附性能  

Adsorption Performance of Co(Ⅱ)with Magnetic MOFs Fe_(3)O_(4)@SiO_(2)@UiO-66-SO_(3)H

作　　者：古建杉 刘德蓉[1] 周倩 李建 汤毅 袁果园[1] 熊伟[1] 刘宁[2] GU Jianshan;LIU Derong;ZHOU Qian;LI Jian;TANG Yi;YUAN Guoyuan;XIONG Wei;LIU Ning(College of Chemistry and Chemical Engineering,Chongqing University of Science&Technology,Chongqing 401331,China;Key Laboratory of Radiation Physics and Technology of Ministry of Education,Institute of Nuclear Science and Technology,SichuanUniversity,Chengdu 610064,China)

机构地区：[1]重庆科技学院化学化工学院,重庆401331 [2]四川大学原子核科学技术研究所辐射物理及技术教育部重点实验室,四川成都610064

出　　处：《原子能科学技术》2021年第10期1738-1745,共8页Atomic Energy Science and Technology

基　　金：国家自然科学基金(21876122);重庆市教委科技计划项目(KJQN202001521)。

摘　　要：通过水热法制备了磁性MOFs材料Fe_(3)O_(4)@SiO_(2)@UiO-66-SO_(3)H,并利用红外光谱仪(FT-IR)、X射线衍射仪(XRD)、比表面积测试(BET)、振动样品磁强计(VSM)、X射线光电子能谱仪(XPS)等对材料结构、形貌和性能进行表征。考察了溶液pH值、时间、温度、Co(Ⅱ)初始浓度对Fe_(3)O_(4)@SiO_(2)@UiO-66-SO_(3)H吸附性能的影响。结果表明,在pH=8.3、温度为298 K下,Fe_(3)O_(4)@SiO_(2)@UiO-66-SO_(3)H对Co(Ⅱ)的理论最大吸附量为106 mg/g;吸附过程符合准二级动力学模型和Langmuir等温模型,吸附是一个自发的吸热过程。Fe_(3)O_(4)@SiO_(2)@UiO-66-SO_(3)H在外加磁场下易从水溶液中分离,5次循环后仍具有较强的吸附性能。The magnetic metal-organic framework(MOFs)Fe_(3)O_(4)@SiO_(2)@UiO-66-SO_(3)H was successfully prepared by hydrothermal method,and the structure,morphology and properties of the material were characterized by FT-IR,XRD,BET,VSM and XPS.In addition,the effects of pH value,time,temperature and initial concentration of Co(Ⅱ)on the adsorption performance of the material were also investigated.The results show that the maximum adsorption capacity of magnetic MOFs for Co(Ⅱ)is 106 mg/g at pH=8.3 and temperature of 298 K.At the same time,the kinetics and isotherm data of the adsorption process are fitted.The data show that the adsorption process is in accordance with the pseudo-second-order kinetics model and Langmuir isothermal model,and the adsorption is a spontaneous and endothermic process.Fe_(3)O_(4)@SiO_(2)@UiO-66-SO_(3)H is easy to be separated from the aqueous solution under the external magnetic field,and still has high adsorption performance after 5 cycles.

关 键 词：磁性 MOFS Co(Ⅱ) 吸附 

分 类 号：X591[环境科学与工程—环境工程]