ZnO@ZIF-8核壳微球的制备及对U(Ⅵ)的吸附性能

doi:10.7503/cjcu20180469

高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (1): 24.doi: 10.7503/cjcu20180469

ZnO@ZIF-8核壳微球的制备及对U(Ⅵ)的吸附性能

王芙香, 陈子玉, 杨玮婷(), 刘丽娟, 任国建, 刘艳凤, 潘勤鹤()

海南大学材料与化工学院, 热带岛屿资源先进材料教育部重点实验室, 海口 570228

收稿日期:2018-06-29 出版日期:2019-01-10 发布日期:2018-12-12
作者简介:
联系人简介: 杨玮婷, 女, 博士, 副研究员, 主要从事复合功能多孔材料方面的研究. E-mail: ywt1982@163.com;潘勤鹤, 男, 博士, 教授, 主要从事先进功能材料方面的研究. E-mail: panqinhe@163.com
基金资助:
国家自然科学基金(批准号: 21761010)、海南省自然科学基金(批准号: 217018)和海南大学科研启动项目(批准号: KYQD(ZR)1806, KYQD1654, KYQD1612)资助.

Preparation and Adsorption Performance for U(Ⅵ) of ZnO@ZIF-8 Core@Shell Microspheres^†

WANG Fuxiang, CHEN Ziyu, YANG Weiting^*(), LIU Lijuan, REN Guojian, LIU Yanfeng, PAN Qinhe^*()

Key Laboratory of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China

Received:2018-06-29 Online:2019-01-10 Published:2018-12-12
Contact: YANG Weiting,PAN Qinhe E-mail:ywt1982@163.com;panqinhe@163.com
Supported by:
† Supported by the National Natural Science Foundation of China(No.21761010), the Natural Science Foundation of Hainan Province, China(No. 217018) and the Start-up Fund of Hainan University, China(Nos.KYQD(ZR)1806, KYQD1654, KYQD1612).

摘要/Abstract

摘要：

利用ZnO诱导制备了ZnO@ZIF-8复合微球材料并将其用于溶液中U(Ⅵ) 的去除. 研究表明, 制备的ZnO@ZIF-8复合微球的直径为1~7 μm, pH=4时, 在水溶液中对U(Ⅵ) 的吸附量最大, 达到145.32 mg/g, 吸附机理可能与铀酰离子与复合材料之间的配位作用和氢键作用相关. 考虑到复合微球中用于U(Ⅵ) 吸附的有效成分ZIF-8的含量仅为12.6%, 以ZIF-8含量计算, 该材料对U(Ⅵ) 的单位吸附量高达1137 mg/g.

关键词: 氧化锌, ZIF-8, 复合微球, 铀吸附

Abstract:

ZnO@ZIF-8 core@shell microspheres were synthesized by a hydrothermal method and applied for the efficient adsorption of U(Ⅵ) from aqueous solution. The size of synthesized ZnO@ZIF-8 core@shell microspheres was in the range of 1—7 μm. The batch experimental results revealed that the sorption of U(Ⅵ) on ZnO@ZIF-8 was strongly dependent on pH, and the maximum sorption capacity of U(Ⅵ) on ZnO@ZIF-8 was 145.32 mg/g at pH=4.0. The adsorption mechanism could be mainly attributed to the coordination and the hydrogen bonding between ZIF-8 framework and U $O 2 2 +$ ions. Considering that the content of ZIF-8 in the composite microspheres was only 12.6%, the unit adsorption capacity of U(Ⅵ) is up to 1137 mg/g.

Key words: ZnO, ZIF-8, Composite microspheres, Uranium adsorption

中图分类号:

O614

TrendMD:

王芙香, 陈子玉, 杨玮婷, 刘丽娟, 任国建, 刘艳凤, 潘勤鹤. ZnO@ZIF-8核壳微球的制备及对U(Ⅵ)的吸附性能. 高等学校化学学报, 2019, 40(1): 24.

WANG Fuxiang,CHEN Ziyu,YANG Weiting,LIU Lijuan,REN Guojian,LIU Yanfeng,PAN Qinhe. Preparation and Adsorption Performance for U(Ⅵ) of ZnO@ZIF-8 Core@Shell Microspheres^†. Chem. J. Chinese Universities, 2019, 40(1): 24.

图/表 8

Fig.1 XRD patterns of ZnO(a), ZIF-8(b) and ZnO@ZIF-8(c)

Fig.2 SEM images of ZnO microspheres(A, B) and ZnO@ZIF-8 microspheres(C, D)

Fig.3 TEM images of ZnO microspheres(A) and ZnO@ZIF-8 microspheres(B)

Fig.4 TG curves of ZIF-8(a) and ZnO@ZIF-8(b) microspheres

Fig.5 PXRD patterns of ZIF-8(a), ZnO@ZIF-8(b) and ZnO@ZIF-8 microspheres in aqueous solution with pH of 6(c), 5(d), 4(e), 3(f) and 2(g)

Fig.6 Effect of pH value of solution on adsorption of uranium by ZnO@ZIF-8 [U(Ⅵ)]initial=100 mg/L, msorbent/Vsolution=0.4 mg/mL, t=4 h.

Fig.7 Effect of reaction time on the uranium adsorption by ZnO@ZIF-8 microspheres [U(Ⅵ)]initial=100 mg/L, msorbent/Vsolution=0.4 mg/mL, pH=4.

Fig.8 Effect of initial concentration of solution on uranium adsorption by ZnO@ZIF-8 msorbent/Vsolution=0.4 mg/mL, pH=4, t=4 h.

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ZnO@ZIF-8核壳微球的制备及对U(Ⅵ)的吸附性能

Preparation and Adsorption Performance for U(Ⅵ) of ZnO@ZIF-8 Core@Shell Microspheres^†

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ZnO@ZIF-8核壳微球的制备及对U(Ⅵ)的吸附性能

Preparation and Adsorption Performance for U(Ⅵ) of ZnO@ZIF-8 Core@Shell Microspheres†

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Preparation and Adsorption Performance for U(Ⅵ) of ZnO@ZIF-8 Core@Shell Microspheres^†