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Ruan M, Zhou H, Zhao L, Hu T, He L, Shan S. The ortho-substituent effect regulating the separation of photogenerated carriers to efficiently photodegrade tetracycline on the surface of FeCo-based MOFs. CHEMOSPHERE 2024; 352:141296. [PMID: 38296214 DOI: 10.1016/j.chemosphere.2024.141296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 12/25/2023] [Accepted: 01/23/2024] [Indexed: 02/13/2024]
Abstract
It is feasible to improve the photodegradation efficiency of organic pollutants by metal-organic frameworks (MOF)-based semiconductors via ligand engineering. In this work, three (Fe/Co)-XBDC-based MOFs were synthesized by introducing different ortho-functional groups X (X = -H, -NO2, -NH2) next to the carboxyl group of the organic ligand (i.e., terephthalic acid). The analysis focused on the influence mechanism of the adjacent functional group effect of the ligand on the physicochemical properties of the material and the actual photodegradation activity of TC. Multiple pieces of evidences suggested that the differences in electron-induced and photocharge-transfer mechanisms of the above ortho functional groups affect the crystal morphology and photocatalytic activity of FeCo-MOF during pyrolysis. Interestingly, (Fe/Co)-NH2BDC exhibited the highest photocatalytic activity under neutral conditions. The results of density functional theory show that the introduction of a strong donor-NH2 group can enhance light absorption and act as an "electron pump" to supply electrons to the iron center, accelerating the separation and efficient transport of photogenerated carriers on the ligand-metal bridge. In conclusion, this study is a proposal for a strategy of structural regulation for the enhancement of the catalytic activity of (Fe/Co)-MOFs in the photodegradation of TC.
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Affiliation(s)
- Ming Ruan
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
| | - Huajing Zhou
- Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming, China
| | - Lingxiang Zhao
- Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming, China
| | - Tianding Hu
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China
| | - Liang He
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China.
| | - Shaoyun Shan
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, China.
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Hu Q, Zhan D, Saeed A, Xu W, Kong L. Highly selective detection of 2,4-dinitrophenol by fluorescent NH 2-MIL-125(Ti) via dual-parameter sensing technology. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:1206-1214. [PMID: 38312059 DOI: 10.1039/d3ay02059b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
The organic contaminant 2,4-dinitrophenol (2,4-DNP) is widely prevalent and poses significant risks to human health. Although numerous in-depth studies having been reported on the highly sensitive detection of 2,4-DNP, there are still challenges to its selective detection. Here, the fluorescence intensity ratio (I0/I) and emission peak shift (Δλ) were utilized for selective detection of 2,4-DNP by NH2-MIL-125(Ti). Notably, the emission peak of the NH2-MIL-125(Ti) suspension exhibited a remarkable red shift in the presence of 2,4-DNP (Δλ = 26 nm), accompanied by the blue shift or weak red shift of analogs, which provided a solid basis for selective detection of 2,4-DNP. Meanwhile, the I0/I ratio of the NH2-MIL-125(Ti) suspension exhibited a robust linear correlation with 2,4-DNP at the low concentration range (0-70 μM). The interaction of the analyte with NH2-MIL-125(Ti) was revealed to involve intermolecular charge transfer (ICT) and fluorescence resonance energy transfer (FRET) through XPS, FTIR, and UV-vis absorption spectroscopy. Additionally, we achieved the detection of 2,4-DNP using a smartphone by recognizing both the blue (B) values and the luminance (L) values. The obtained results demonstrated that the NH2-MIL-125(Ti) probe based on dual-parameter sensing technology exhibited excellent potential for selectively detecting 2,4-DNP in water environments, thereby offering significant prospects for its application in water quality assessment.
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Affiliation(s)
- Qi Hu
- University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
- Key Laboratory of Environmental Optics and Technology, Institute of Solid State Physics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
| | - Deyi Zhan
- University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
- Key Laboratory of Environmental Optics and Technology, Institute of Solid State Physics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
| | - Abdul Saeed
- University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
- Key Laboratory of Environmental Optics and Technology, Institute of Solid State Physics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
| | - Weihong Xu
- University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
- Key Laboratory of Environmental Optics and Technology, Institute of Solid State Physics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
| | - Lingtao Kong
- University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
- Key Laboratory of Environmental Optics and Technology, Institute of Solid State Physics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
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Li J, Huang R, Chen L, Xia Y, Yan G, Liang R. Mixed valence copper oxide composites derived from metal-organic frameworks for efficient visible light fuel denitrification. RSC Adv 2023; 13:36477-36483. [PMID: 38099249 PMCID: PMC10719906 DOI: 10.1039/d3ra07532j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Accepted: 12/08/2023] [Indexed: 12/17/2023] Open
Abstract
The construction of heterojunctions has been used to optimize photocatalyst fuel denitrification. In this work, HKUST-1(Cu) was used as a sacrificial template to synthesize a composite material CuxO (CuO/Cu2O) that retains the original MOF framework for photocatalytic fuel denitrification by calcination at different temperatures. By adjusting the temperature, the content of CuO/Cu2O can be changed to control the performance and structure of CuxO-T effectively. The results show that CuxO-300 has the best photocatalytic performance, and its denitrification rate reaches 81% after 4 hours of visible light (≥420 nm) irradiation. Through the experimental analysis of pyridine's infrared and XPS spectra, we found that calcination produces CuxO-T mixed-valence metal oxide, which can create more exposed Lewis acid sites in the HKUST-1(Cu) framework. This leads to improved pyridine adsorption capabilities. The mixed-valence metal oxide forms a type II semiconductor heterojunction, which accelerates carrier separation and promotes photocatalytic activity for pyridine denitrification.
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Affiliation(s)
- Jian Li
- State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University Fuzhou 350002 China
| | - Renkun Huang
- State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University Fuzhou 350002 China
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University Ningde 352100 China
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University Ningde 352100 China +86-15860671891
| | - Lu Chen
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University Ningde 352100 China
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University Ningde 352100 China +86-15860671891
| | - Yuzhou Xia
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University Ningde 352100 China
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University Ningde 352100 China +86-15860671891
| | - Guiyang Yan
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University Ningde 352100 China
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University Ningde 352100 China +86-15860671891
| | - Ruwen Liang
- Province University Key Laboratory of Green Energy and Environment Catalysis, Ningde Normal University Ningde 352100 China
- Fujian Provincial Key Laboratory of Featured Materials in Biochemical Industry, Ningde Normal University Ningde 352100 China +86-15860671891
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