Issue 28, 2019

A multifunctional Zr(iv)-based metal–organic framework for highly efficient elimination of Cr(vi) from the aqueous phase

Abstract

A highly stable luminescent Zr(IV)-MOF, [Zr6O4(OH)8(H2O)4(TCPP)4]·9DMF·3.5H2O (JLU-MOF60, H4TCPP = 2,3,5,6-tetrakis(4-carboxyphenyl)pyrazine, DMF = N,N-dimethylformamide) was successfully prepared. JLU-MOF60 with the AIE effect and high porosity consists of 8-c Zr6 clusters and 4-c ligands with an sqc topology. Interestingly, it exhibits remarkable chemical stability in water over extensive pH values varying from 0 to 11. Due to its outstanding water stability and Zr-bonded hydroxides in the framework, JLU-MOF60 shows a high capture capability (149 mg g−1) and rapid adsorption rate (38 mg g−1 min−1) for Cr2O72− in water. Moreover, benefiting from the AIE effect of the H4TCPP ligand, JLU-MOF60 can not only sensitively and selectively detect Cr2O72−, but also effectively photo-reduce Cr(VI) to Cr(III) in the aqueous phase. It is worth mentioning that the KSV value of JLU-MOF60 for detecting Cr2O72− is as high as 5.91 × 104 M−1, and the detection limit is as low as 0.38 μM. Simultaneously, the κ value of the photocatalytic reaction can reach up to 0.058 min−1. Accordingly, JLU-MOF60 can be regarded as a multifunctional material to efficiently eliminate Cr2O72− from the aqueous phase.

Graphical abstract: A multifunctional Zr(iv)-based metal–organic framework for highly efficient elimination of Cr(vi) from the aqueous phase

Supplementary files

Article information

Article type
Paper
Submitted
17 Apr 2019
Accepted
13 Jun 2019
First published
14 Jun 2019

J. Mater. Chem. A, 2019,7, 16833-16841

A multifunctional Zr(IV)-based metal–organic framework for highly efficient elimination of Cr(VI) from the aqueous phase

J. Liu, Y. Ye, X. Sun, B. Liu, G. Li, Z. Liang and Y. Liu, J. Mater. Chem. A, 2019, 7, 16833 DOI: 10.1039/C9TA04026A

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