Phosphate group functionalized magnetic metal-organic framework nanocomposite for highly efficient removal of U(VI) from aqueous solution

被引：19

作者：

Bi, Changfen ^{[1
]}

Zheng, Baoxin ^{[2
]}

Yuan, Ye ^{[1
]}

Ning, Hongxin ^{[1
]}

Gou, Wenfeng ^{[1
]}

Guo, Jianghong ^{[1
]}

Chen, Langxing ^{[3
]}

Hou, Wenbin ^{[1
]}

Li, Yiliang ^{[1
]}

机构：

[1] Chinese Acad Med Sci, Tianjin Key Lab Radiat Med & Mol Nucl Med, Inst Radiat Med, Peking Union Med Coll, Tianjin 300192, Peoples R China

[2] Tianjin Univ Tradit Chinese Med, Coll Tradit Chinese Med, Tianjin 301617, Peoples R China

[3] Nankai Univ, Tianjin Key Lab Biosensing & Mol Recognit, State Key Lab Med Chem Biol, Res Ctr Analyt Sci,Coll Chem, Tianjin 300071, Peoples R China

来源：

SCIENTIFIC REPORTS | 2021年 / 11卷 / 01期

关键词：

MESOPOROUS SILICA; URANIUM SORPTION; ADSORBENT; CAPTURE; UIO-66; MOF; SEPARATION; RECOVERY; ACID; MICROSPHERES;

D O I：

10.1038/s41598-021-03246-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The phosphate group functionalized metal-organic frameworks (MOFs) as the adsorbent for removal of U(VI) from aqueous solution still suffer from low adsorption efficiency, due to the low grafting rate of groups into the skeleton structure. Herein, a novel phosphate group functionalized metal-organic framework nanoparticles (denoted as Fe3O4@SiO2@UiO-66-TPP NPs) designed and prepared by the chelation between Zr and phytic acid, showing fast adsorption rate and outstanding selectivity in aqueous media including 10 coexisting ions. The Fe3O4@SiO2@UiO-66-TPP was properly characterized by TEM, FT-IR, BET, VSM and Zeta potential measurement. The removal performance of Fe3O4@SiO2@UiO-66-TPP for U(VI) was investigated systematically using batch experiments under different conditions, including solution pH, incubation time, temperature and initial U(VI) concentration. The adsorption kinetics, isotherm, selectivity studies revealed that Fe3O4@SiO2@UiO-66-TPP NPs possess fast adsorption rates (approximately 15 min to reach equilibrium), high adsorption capacities (307.8 mg/g) and outstanding selectivity (S-u = 94.4%) towards U(VI), which in terms of performance are much better than most of the other magnetic adsorbents. Furthermore, the adsorbent could be reused for U(VI) removal without obvious loss of adsorption capacity after five consecutive cycles. The research work provides a novel strategy to assemble phosphate group-functionalized MOFs.

引用

页数：17

共 84 条

[1] Amine-functionalized Zr-MOF/CNTs nanocomposite as an efficient and reusable photocatalyst for removing organic contaminants [J].