A multifunctional Zr(iv)-based metal–organic framework for highly efficient elimination of Cr(vi) from the aqueous phase. Issue 28 (2nd July 2019)

• Record Type: Journal Article
• Authors: Liu, Junmin; Ye, Yu; Sun, Xiaodong; Liu, Bing; Li, Guanghua; Liang, Zhiqiang; Liu, Yunling
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 28(2019)
• Page Start: 16833
• Page End: 16841
• Publication Date: 2019-07-02
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta04026a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : An ultra-stable, multifunctional Zr-MOF material with the AIE effect has been successfully prepared, which can highly capture, selectively detect and photo-reduce Cr2 O7 2− in aqueous. It can be a promising candidate for efficiently eliminating Cr(vi ). Abstract : A highly stable luminescent Zr(iv )-MOF, [Zr6 O4 (OH)8 (H2 O)4 (TCPP)4 ]·9DMF·3.5H2 O (JLU-MOF60, H4 TCPP = 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 ansqc 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 Cr2 O7 2− in water. Moreover, benefiting from the AIE effect of the H4 TCPP ligand, JLU-MOF60 can not only sensitively and selectively detect Cr2 O7 2−, but also effectively photo-reduce Cr(vi ) to Cr(iii ) in the aqueous phase. It is worth mentioning that the K SV value ofJLU-MOF60 for detecting Cr2 O7 2− is as high as 5.91 × 10 4 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 Cr2 O7 2− from the aqueous phase.