A Bismuth-Based Metal–Organic Framework for Visible-Light-Driven Photocatalytic Decolorization of Dyes and Oxidation of Phenylboronic Acids

Abstract

In this work, a Bi-based metal−organic framework (MOF; Bi-MMTAA) with 2-mercapto-4-methyl-5-thiazoleacetic acid (MMTAA) as the organic ligand is synthesized. The crystal structure of Bi-MMTAA was determined by single-crystal X-ray diffraction. Theoretical calculations reveal that Bi-MMTAA is a p-type semiconductor, and electrons can delocalize through the πconjugation when excited by a photon with an energy higher than the Bi-MMTAA band gap, which is beneficial to charge separation and transfer. The photoelectrical properties suggest that free electrons can be produced over Bi-MMTAA under light irradiation. The photocatalytic results suggest that Bi-MMTAA can decolorize rhodamine B (RhB) and oxidize phenylboronic acid to phenol under visible light (λ > 420 nm), with superoxide radicals being the main reactive oxygen species. Our results enrich the family of Bi-based MOFs and may inspire further exploration of Bi-based MOFs, including both synthesis and potential applications.

Extended Light Absorption and Improved Charge Separation by Protonation of the Organic Ligand in a Bismuth‐Based Metal‐Organic Framework

“…The two peaks for Bi-MMTAA-H and Bi-MMTAA-R between 0 and 5 ppm are attributed to the protons of À CH 3 and À CH 2 À . [25] Chemistry-A European Journal Subsequently, confocal Raman spectra for the single-crystals were carried out to confirm that the nitrogen in Bi-MMTAA-H was protonated. As shown in Figure 3b, the CÀ N stretching peaks at 1317 cm À 1 appear in MMTAA and Bi-MMTAA-R, but not in Bi-MMTAA-H.…”

“…An orange product, named as Bi-MMTAA-H, was obtained after filtrating, washing with methanol and acetone several times and drying in an oven at 65 °C for 24 h. The previously reported yellow product, named as Bi-MMTAA-R, was obtained by a reflux method at 100 °C for 24 h under stirring from the same mixture. [25] Deposition Number(s) 2077856 (Bi-MMTAA-H), 2117163 (Bi-MMTAA-R) contain(s) the supplementary crystallographic data for this paper. These data are provided free of charge by the joint Cambridge Crystallographic Data Centre and Fachinformationszentrum Karlsruhe Access Structures service.…”

“…Figure 2. (a) Bi-MMTAA-R (left) and Bi-MMTAA-H (right) solids synthesized by hydrothermal and reflux methods; Forward polarizing microscope images of (b) Bi-MMTAA-H and (c) Bi-MMTAA-R; (d) UV-vis DRS, (e) the PXRD patterns, (f) TGA and DSC curves of Bi-MMTAA-H and Bi-MMTAA-R [25]. …”

Construction of naphthalene diimide-based cadmium complexes and their application in iodine adsorption, photochromism, and photocatalysis

“…18 Among the new generation of dye wastewater treatment methods, crystalline complex-based photodegradation technology, has gradually become a research hotspot due to its advantages of porosity and modifiability, which is vital for studying the mechanism of the photocatalytic process and potential industrial applications. 19–27…”

“…18 Among the new generation of dye wastewater treatment methods, crystalline complex-based photodegradation technology, has gradually become a research hotspot due to its advantages of porosity and modifiability, which is vital for studying the mechanism of the photocatalytic process and potential industrial applications. [19][20][21][22][23][24][25][26][27] In addition, due to the uncontrolled production of greenhouse gases, the average temperature has risen at the fastest rate ever recorded over the past fifty years. 28 Nuclear power is a low-carbon energy source and is one of the carbon-free alternatives.…”