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Wang J, Wang H, Qi X, Zhi G, Wang J. Cobalt metal replaces Co-ZIF-8 mesoporous material for effective adsorption of arsenic from wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:32935-32949. [PMID: 38671264 DOI: 10.1007/s11356-024-33419-2] [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: 12/29/2023] [Accepted: 04/17/2024] [Indexed: 04/28/2024]
Abstract
The high cost and low adsorption capacity of primary metal-organic frameworks (ZIF-8) limit their application in heavy metal removal. In this paper, Co/Zn bimetallic MOF materials were synthesized with excellent adsorption performance for As5+. The adsorption reached equilibrium after 180 min and the maximum adsorption was 250.088 mg/g. In addition, Co-ZIF-8 showed strong selective adsorption of As5+. The adsorption process model of Co-ZIF-8 fits well with the pseudo-second-order kinetic model (R2=0.997) and Langmuir isotherm model (R2=0.994), and it is demonstrated that the adsorption behavior of the adsorbent is a single layer of chemical adsorption. In addition, when the adsorbent enters the arsenic-containing solution, the surface of Co-ZIF-8 is hydrolyzed to produce a large number of Co-OH active sites, and As5+ arrives at the surface of Co-ZIF-8 by electrostatic adsorption and combines with the active sites to generate the arsenic-containing complex As-O-Co. After four cycles, Co-ZIF-8 showed 80% adsorption of As5+. This study not only provides a new method to capture As5+ in water by preparing MOF with partial replacement of the central metal, but also has great significance for the harmless disposal of polluted water.
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Affiliation(s)
- Junfeng Wang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Heng Wang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Xianjin Qi
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
| | - Gang Zhi
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Jianhua Wang
- State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China
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Halder A, Bain DC, Oktawiec J, Addicoat MA, Tsangari S, Fuentes-Rivera JJ, Pitt TA, Musser AJ, Milner PJ. Enhancing Dynamic Spectral Diffusion in Metal-Organic Frameworks through Defect Engineering. J Am Chem Soc 2023; 145:1072-1082. [PMID: 36595477 PMCID: PMC10022273 DOI: 10.1021/jacs.2c10672] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The crystal packing of organic chromophores has a profound impact on their photophysical properties. Molecular crystal engineering is generally incapable of producing precisely spaced arrays of molecules for use in photovoltaics, light-emitting diodes, and sensors. A promising alternative strategy is the incorporation of chromophores into crystalline metal-organic frameworks (MOFs), leading to matrix coordination-induced emission (MCIE) upon confinement. However, it remains unclear how the precise arrangement of chromophores and defects dictates photophysical properties in these systems, limiting the rational design of well-defined photoluminescent materials. Herein, we report new, robust Zr-based MOFs constructed from the linker tetrakis(4-carboxyphenyl)ethylene (TCPE4-) that exhibit an unexpected structural transition in combination with a prominent shift from green to blue photoluminescence (PL) as a function of the amount of acid modulator (benzoic, formic, or acetic acid) used during synthesis. Time-resolved PL (TRPL) measurements provide full spectral information and reveal that the observed hypsochromic shift arises due to a higher concentration of linker substitution defects at higher modulator concentrations, leading to broader excitation transfer-induced spectral diffusion. Spectral diffusion of this type has not been reported in a MOF to date, and its observation provides structural information that is otherwise unobtainable using traditional crystallographic techniques. Our findings suggest that defects have a profound impact on the photophysical properties of MOFs and that their presence can be readily tuned to modify energy transfer processes within these materials.
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Affiliation(s)
- Arjun Halder
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850, United States
| | - David C Bain
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850, United States
| | - Julia Oktawiec
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Matthew A Addicoat
- School of Science and Technology, Nottingham Trent University, Clifton Lane, NG11 8NS Nottingham, United Kingdom
| | - Stavrini Tsangari
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850, United States
| | - José J Fuentes-Rivera
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850, United States
| | - Tristan A Pitt
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850, United States
| | - Andrew J Musser
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850, United States
| | - Phillip J Milner
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14850, United States
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Cong L, Pan YZ, Qin YH, Jiang JN. A new 3D heterometallic coordination polymer: luminescent property and nursing application value on acute cerebral infarction. Des Monomers Polym 2022; 25:12-18. [PMID: 35140543 PMCID: PMC8820831 DOI: 10.1080/15685551.2022.2033431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
With the solvothermal reactions of flexible tetracarboxylic acid ligand with the Cd(II) and Ca(II) ions, we acquired a new heterometallic coordination polymer formulated as {[Cd2Ca2(L)2(DMF)2(H2O)7]·(DMF)·2(H2O)}n (1, H4L is 5-(bis(4-carboxybenzyl)amino)isophthalic acid, DMF is N,N’-Dimethylformamide). Furthermore, the solids of 1 shows ligand-centered luminescence at room temperature. It not only evaluated the treatment and nursing application value on acute cerebral infarction, but also explored the related mechanism. Above of all, ELISA assay measured the content of the MMP-9 released into the cerebrospinal fluid, and the real time RT-PCR was implemented and the NF-κB activation in the brain tissue was measured.
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Affiliation(s)
- Li Cong
- Department of Neurology Ward 1, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Yun-Zhi Pan
- Department of Neurology Ward 1, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Ying-Hui Qin
- Department of Neurology Ward 1, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Ji-Na Jiang
- Department of Neurology Ward 1, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
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Wang Y, Li M, Hu J, Feng W, Li J, You Z. Highly efficient and selective removal of Pb2+ by ultrafast synthesis of HKUST-1: Kinetic, isotherms and mechanism analysis. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127852] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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