高产率ZIF-L的可控制备及对VO_(3)^(-)的高效去除  

Controlled preparation of ZIF-L with high yield and efficient removal of VO_(3)^(-)

作　　者：何家霖 张佩聪[1] 黄艺[2] 李峻峰[1] 张文涛[1] 丁秋权 HE Jia-lin;ZHANG Pei-cong;HUANG Yi;LI Jun-feng;ZHANG Wen-tao;DING Qiu-quan(College of Materials and Chemical Engineering,Chengdu University of Technology,Chengdu 610069,China;College of Ecology and Environment,Chengdu University of Technology,Chengdu 610069,China)

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]成都理工大学生态环境学院,四川成都610059

出　　处：《化学研究与应用》2022年第5期1120-1128,共9页Chemical Research and Application

基　　金：四川省科技厅项目(2019ZDZX0025和2021JDTD0013)资助;四川省钒钛产业发展研究中心项目(2020VTCY-Z-01)资助;四川大学攀枝花学校城市战略合作专项资金项目(2019CDPZH-6)资助。

摘　　要：针对新型MOFs材料ZIF-L制备中普遍存在的产率低、原料浪费大的问题,重点研究了制备方法、溶剂、n(Zn^(2+))/n_(Hmim)摩尔比、锌源、反应时间等因素对其物相、形貌、产率及吸附率的影响,进而优化制备工艺,实现了高产率ZIF-L的可控制备及对VO_(3)^(-)的高效去除。研究表明,在硝酸锌为锌源,水为溶剂,n(Zn^(2+))/n_(Hmim)摩尔比为1:8,110℃下水热24h的优化条件下,合成的ZIF-L呈典型的2D叶型板状晶,产率及吸附率分别高达91%和91.9%。吸附热力学研究结果表明,ZIF-L对钒离子的吸附过程遵循Langmuir等温吸附,饱和吸附量为26.13mg/g,吸附过程符合准二级动力学反应方程,有望在钒污染治理中发挥巨大潜力。To address the problems of low yield and waste of raw materials in the preparation of the novel MOFs material ZIF-L,we focused on the effects of preparation method,solvent,n(Zn^(2+))/n_(Hmim)molar ratio,zinc source and reaction time on its phase,morphology,yield and adsorption rate,and then optimized the preparation process to achieve the controlled preparation of high yield ZIF-L and the efficient VO_(3)^(-) removal.It is shown that the synthesized ZIF-L has a typical 2D leaf-shaped platelet crystal with a yield and adsorption rate of 91%and 91.9%,respectively,under the optimized conditions of zinc nitrate as the Zn source,water as the solvent,n(Zn^(2+))/n_(Hmim) molar ratio of 1:8,and hydrothermal treatment at 110℃for 24 h.The results of the adsorption thermodynamic study showed that the adsorption process of vanadium ions by ZIF-L followed the Langmuir isothermal adsorption with a saturation adsorption capacity of 26.13 mg/g,and the adsorption process was in accordance with the pseudo second-order equation.It is expected to play a great potential in vanadium pollution treatment.

关 键 词：ZIF-L 高产率 溶剂热法 可控制备 VO_(3)^(-) 

分 类 号：O614.2[理学—无机化学]