CN110898855A - Synthetic method for rod-shaped MOF-74(Mn) assembled by sheets - Google Patents

Synthetic method for rod-shaped MOF-74(Mn) assembled by sheets Download PDF

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Publication number
CN110898855A
CN110898855A CN201911179183.7A CN201911179183A CN110898855A CN 110898855 A CN110898855 A CN 110898855A CN 201911179183 A CN201911179183 A CN 201911179183A CN 110898855 A CN110898855 A CN 110898855A
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assembled
rod
mof
sheets
reaction
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韩锡光
袁玉胜
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Jiangsu Normal University
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Jiangsu Normal University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/1691Coordination polymers, e.g. metal-organic frameworks [MOF]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

A synthesis method of rod-shaped MOF-74(Mn) assembled by sheets comprises the steps of dissolving 2, 5-dihydroxy terephthalic acid and 50% manganese nitrate solution in mixed solution of N, N-dimethylformamide, absolute ethyl alcohol and deionized water to obtain mixed solution, transferring the mixed solution into a reaction kettle, and heating for a period of time; after the reaction is finished, the rod-shaped manganese-based MOF assembled by sheets is obtained by centrifugal washing and drying. The synthesis method is simple and feasible, the tablets are obtained by a hydrothermal synthesis method and assembled into the rod-shaped manganese-based MOFs, and the MOFs size and shape can be controlled by adjusting the reactant proportion, the reaction solvent, the reaction temperature and the reaction time. The sheet of the invention is assembled into a rod-shaped MOF-74(Mn) material, belongs to a metal-organic framework material, can be used as a new catalytic material, and has a better application prospect.

Description

Synthetic method for rod-shaped MOF-74(Mn) assembled by sheets
Technical Field
The invention relates to synthesis of a novel micron material, in particular to a synthesis method of rod-shaped MOF-74(Mn) assembled by sheets.
Background
Metal-organic frameworks (MOFs) materials are a new class of organic-inorganic hybrid materials formed by self-assembly of inorganic metal ions and organic ligands. Compared with the traditional inorganic porous material, the material has higher specific surface area, porosity and regular pore channels, and the structure and the property of the material are easy to regulate and control. Most of the currently synthesized MOFs are massive crystals, and the morphology, size and regulation of the MOFs are lack of research, so that the performance of the MOFs is further improved by controlling the morphology and size of the MOFs. Compared with metal oxides and noble metals, no study has been reported on the current synthesis method of rod-shaped MOF-74(Mn) assembled from sheets by adjusting reaction conditions during the synthesis of Mn-based MOFs.
Disclosure of Invention
The invention aims to provide a synthesis method for assembling rod-shaped MOF-74(Mn) from sheets, and realizes the control of MOFs size and morphology by adjusting reactant proportion, reaction solvent, reaction temperature and reaction time.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a method of synthesis of MOF-74(Mn) in rod form assembled from sheets comprising the steps of:
s1: dissolving 2, 5-dihydroxyterephthalic acid and a 50% manganese nitrate solution in a mixed solution of N, N-dimethylformamide, absolute ethyl alcohol and deionized water to obtain a mixed solution, transferring the mixed solution into a reaction kettle, and heating for a period of time;
s2: after the reaction is finished, the rod-shaped manganese-based MOF assembled by sheets is obtained by centrifugal washing and drying.
In a more preferable embodiment, the molar ratio of the 2, 5-dihydroxyterephthalic acid to the 0.5mmol 50% manganese nitrate solution is 0.5 to 2: 1.
as a further preferable technical scheme, the volume ratio of the N, N-dimethylformamide, the absolute ethyl alcohol and the deionized water is 9: 5: 1.
in a more preferred embodiment, in step S1, the reaction kettle is a 25mL polytetrafluoroethylene reaction kettle.
In a further preferable technical scheme, in the step S1, the heating temperature is 150-200 ℃, and the reaction time is 2 hours.
The invention also provides the tablet assembled rod-shaped Mn-based MOF prepared by the synthesis method.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a synthesis method for assembling rod-shaped MOF-74(Mn) from sheets, which is simple and feasible, and the rod-shaped manganese-based MOF assembled from the sheets is obtained by a hydrothermal synthesis method;
the MOFs size and shape can be controlled by adjusting the reactant proportion, the reaction solvent, the reaction temperature and the reaction time;
the sheet of the invention is assembled into a rod-shaped MOF-74(Mn) material, belongs to a metal-organic framework material, can be used as a new catalytic material, and has a better application prospect.
Drawings
FIG. 1 is a Scanning Electron Micrograph (SEM) and X-ray powder diffraction (XRD) of a sheet-assembled, rod-like Mn-based MOF prepared in example 1 of the present invention;
FIG. 2 is a scanning electron micrograph of a sheet-assembled, rod-like Mn-based MOF prepared in example 2 of the present invention;
FIG. 3 is a scanning electron micrograph of a sheet-assembled, rod-like Mn-based MOF prepared in example 3 of the present invention.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A method of synthesizing MOF-74(Mn) in rod form assembled from sheets, comprising:
dissolving 1mmol of 2, 5-dihydroxy terephthalic acid and 0.5mmol of 50% manganese nitrate solution in N, N-dimethylformamide, absolute ethyl alcohol and deionized water in a volume ratio of 9: 5: 1, the above mixed solution was transferred to a 25mL teflon reaction vessel, heated to 150 ℃ and reacted for 2 hours. And after the reaction is finished, centrifugally washing and drying to obtain the sheet-assembled rod-like manganese-based MOF. FIG. 1 shows the scanning electron micrographs (a, b) and XRD (c) of the product obtained under the experimental conditions described above. The XRD pattern indicated that the resulting product was Mn-based MOF (MOF-74), and the scanning electron micrograph indicated that the resulting product was a rod-like Mn-based MOF assembled from sheets, and the thickness of the sheets was relatively uniform.
Example 2
In this example, a rod-shaped Mn based MOF was prepared by adjusting the amount of 2, 5-dihydroxyterephthalic acid to 0.25mmol, 0.5mmol, 0.75mmol, and 1.0mmol based on example 1. FIG. 2(a-d) is a scanning electron micrograph showing the products obtained when the amount of 2, 5-dihydroxyterephthalic acid was 0.25mmol, 0.5mmol, 0.75mmol and 1.0mmol, in that order; by scanning electron micrographs of the product obtained by changing the amount of the reactant (2, 5-dihydroxyterephthalic acid) as described above, it can be seen that the uniform sheet-assembled rod-shaped Mn-based MOFs with different sizes and morphologies can be obtained when the amount of the reactant (2, 5-dihydroxyterephthalic acid) in the present invention is in the range of 0.25mmol to 1.0 mmol.
Example 3
In this example, the reaction temperature was adjusted to 200 ℃ in addition to example 1, and FIG. 3(a) is a scanning electron micrograph of a product having a reaction temperature of 150 ℃ and FIG. 3(b) is a scanning electron micrograph of a product having a reaction temperature of 200 ℃. Scanning electron micrographs of products obtained by different reaction temperatures show that the uniform sheet assembled rod-shaped Mn-based MOF with different sizes and appearances can be obtained by adjusting the reaction temperature of the invention within the range of 150-200 ℃.

Claims (6)

1. A method of synthesizing MOF-74(Mn) in rod form assembled from sheets, comprising the steps of:
s1: dissolving 2, 5-dihydroxyterephthalic acid and a 50% manganese nitrate solution in a mixed solution of N, N-dimethylformamide, absolute ethyl alcohol and deionized water to obtain a mixed solution, transferring the mixed solution into a reaction kettle, and heating for a period of time;
s2: after the reaction is finished, the rod-shaped manganese-based MOF assembled by sheets is obtained by centrifugal washing and drying.
2. The synthesis method of MOF-74(Mn) rods assembled from sheets according to claim 1, wherein the molar ratio of the 2, 5-dihydroxyterephthalic acid to the 0.5mmol 50% manganese nitrate solution is 0.5-2: 1.
3. a synthesis method of MOF-74(Mn) in rod form assembled from sheets according to claim 1, wherein the volume ratio of N, N-dimethylformamide, absolute ethanol and deionized water is 9: 5: 1.
4. the method for synthesizing MOF-74(Mn) in rod form assembled from sheets according to claim 1, wherein in step S1, the reaction kettle is a 25mL teflon reaction kettle.
5. The synthesis method of MOF-74(Mn) rods assembled from sheets according to claim 1, wherein in step S1, the heating temperature is 150-200 ℃ and the reaction time is 2 h.
6. A sheet-assembled, rod-like Mn-based MOF prepared by the synthesis method of any preceding claim.
CN201911179183.7A 2019-11-27 2019-11-27 Synthetic method for rod-shaped MOF-74(Mn) assembled by sheets Pending CN110898855A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112121763A (en) * 2020-09-21 2020-12-25 广东石油化工学院 Carbon-based Mn-MOF-500 adsorption material and preparation method thereof
CN112844323A (en) * 2021-01-11 2021-05-28 潍坊学院 M-MOF-74/silicon oxide composite material and preparation method and application thereof
CN114950568A (en) * 2022-06-29 2022-08-30 中国科学院上海硅酸盐研究所 Mn-MOF material and application thereof in degrading ozone in mobile phase system
CN118652444A (en) * 2024-08-15 2024-09-17 山东海化集团有限公司 Preparation method for accurately regulating and controlling morphology of UiO-67 material and application of prepared material

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US20110269984A1 (en) * 2010-04-30 2011-11-03 The Board Of Regents Of The University Of Texas System Acetylene storage using metal-organic frameworks of the formula M2(2,5-dihydroxyterephthalate)
CN106345527A (en) * 2016-09-30 2017-01-25 上海理工大学 Mn base metal organic skeletal catalyst, and preparation method and application thereof in air pollution prevention
CN108786920A (en) * 2018-04-19 2018-11-13 上海理工大学 A kind of Mn bases catalyst and Mn bases organic backbone and SBA-15 composite materials
CN110090621A (en) * 2019-05-16 2019-08-06 南京林业大学 Derivative porous carbon materials of a kind of metal organic framework and the preparation method and application thereof

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112121763A (en) * 2020-09-21 2020-12-25 广东石油化工学院 Carbon-based Mn-MOF-500 adsorption material and preparation method thereof
CN112121763B (en) * 2020-09-21 2023-08-04 广东石油化工学院 Carbon-based Mn-MOF-500 adsorption material and preparation method thereof
CN112844323A (en) * 2021-01-11 2021-05-28 潍坊学院 M-MOF-74/silicon oxide composite material and preparation method and application thereof
CN114950568A (en) * 2022-06-29 2022-08-30 中国科学院上海硅酸盐研究所 Mn-MOF material and application thereof in degrading ozone in mobile phase system
CN118652444A (en) * 2024-08-15 2024-09-17 山东海化集团有限公司 Preparation method for accurately regulating and controlling morphology of UiO-67 material and application of prepared material

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Application publication date: 20200324