Issue 47, 2020

Excellent photoreduction performance of Cr(vi) over (WO4)2−-doped metal organic framework materials

Abstract

A new conductive metal–organic-framework (MOF) photocatalyst, (WO4)2−-doped bismuth terephthalate (referred to as nNa2WO4BiBDC), was synthesized and characterized by varying the precursor molar ratio (n = 0.1, 0.3, 0.4, and 0.5) of Na2WO4/Bi(NO3)3 in the presence of terephthalic acid through a one-pot solvothermal process. This study found that doping (WO4)2− into BiBDC enhanced the separation of photo-generated carriers, improved the photocatalytic properties of bismuth terephthalate (BiBDC), and enabled the application in Cr(VI) reduction under UV light irradiation with the synergic effect from citric acid acting as a hole scavenger. Among all the precursor ratios of Na2WO4/Bi(NO3)3 used, 0.4Na2WO4BiBDC has the optimum performance, leading to triple gain in reduction efficiency for undoped BiBDC. The synthetic strategy to dope (WO4)2− into a layered MOF as a viable option for modification of MOFs was demonstrated in this study. Finally, the photoreduction of Cr(VI) by (WO4)2-doped bismuth terephthalate enables a new promising wastewater treatment option.

Graphical abstract: Excellent photoreduction performance of Cr(vi) over (WO4)2−-doped metal organic framework materials

Supplementary files

Article information

Article type
Paper
Submitted
06 Sep 2020
Accepted
09 Nov 2020
First published
10 Nov 2020

New J. Chem., 2020,44, 20704-20714

Excellent photoreduction performance of Cr(VI) over (WO4)2−-doped metal organic framework materials

X. Zhao, L. Wu, X. Chen, J. Hu, T. Wu, Q. Li and K. Lv, New J. Chem., 2020, 44, 20704 DOI: 10.1039/D0NJ04468G

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