Issue 37, 2023

Fast photocatalytic degradation of rhodamine B using indium-porphyrin based cationic MOF under visible light irradiation

Abstract

A broad light-harvesting range and efficient charge separation are two main ways to enhance the visible photocatalytic performance of semiconductors. Herein, an ionic porphyrin MOF [In(TPyP)]·(NO3) (1) (TPyP = 5,10,15,20-tetrakis(4-pyridyl)-21H,23H-porphyrin) was synthesized via in situ metalation. The orderly arranged porphyrin photosensitizer and the internal electric field between the MOF host and NO3 guests enable effective visible light response and electron–hole separation. Consequently, the as-synthesized MOF shows efficient photocatalytic degradation of rhodamine B (RhB), methyl orange (MO) and methylene blue (MB) organic pollutants. It can degrade 99.07% of RhB within only 20 minutes under visible light irradiation (λ > 420 nm) with a high chemical reaction rate constant of 0.2400 min−1. The photocatalytic activity of the title MOF is more efficient than those of other reported MOFs, COFs and even inorganic semiconductors. The reusability, energy level, band gap, charge distribution and main degradation mechanisms of the photocatalyst were well studied.

Graphical abstract: Fast photocatalytic degradation of rhodamine B using indium-porphyrin based cationic MOF under visible light irradiation

Supplementary files

Article information

Article type
Paper
Submitted
11 Jul 2023
Accepted
28 Aug 2023
First published
28 Aug 2023

Phys. Chem. Chem. Phys., 2023,25, 25139-25145

Fast photocatalytic degradation of rhodamine B using indium-porphyrin based cationic MOF under visible light irradiation

C. Dou, X. Tian, Y. Chen, P. Yin, J. Guo, X. Yang, Y. Guo and L. Ma, Phys. Chem. Chem. Phys., 2023, 25, 25139 DOI: 10.1039/D3CP03255H

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