CN102993221A - Method for preparing nano-zeolite metal-organic framework compounds by microreactor - Google Patents

Method for preparing nano-zeolite metal-organic framework compounds by microreactor Download PDF

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CN102993221A
CN102993221A CN2012105391731A CN201210539173A CN102993221A CN 102993221 A CN102993221 A CN 102993221A CN 2012105391731 A CN2012105391731 A CN 2012105391731A CN 201210539173 A CN201210539173 A CN 201210539173A CN 102993221 A CN102993221 A CN 102993221A
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solution
organic framework
microreactor
framework compound
metal precursor
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CN102993221B (en
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白云翔
董亮亮
张春芳
顾瑾
孙余凭
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Jiangnan University
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Jiangnan University
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Abstract

The invention relates to a method for preparing nano-zeolite metal-organic framework compounds by a microreactor, and belongs to the technical field of preparation of nano-particles, which is characterized by comprising the following steps of: constructing a microreactor by a porous film; respectively dissolving a metal precursor and an organic ligand in a solvent to prepare a metal precursor solution A and an organic ligand solution B; respectively arranging the metal precursor solution A and the organic ligand solution B at two sides of the film; by a pressure difference of the two sides of the film, uniformly pressing reactants at one side of the film into reactants at the other side of the film through the pores of the film, to generate nano-particles; and centrifuging, washing and drying to obtain the target product. The method for preparing the nano-zeolite metal-organic framework compounds by the microreactor is simple in operation, strong in controllability of particle structure, and is suitable for preparation and industrial production of various nano-zeolite metal-organic framework compounds.

Description

A kind of microreactor prepares the method for nanometer class zeolite metallic organic framework compound
Technical field
The present invention relates to the method that a kind of microreactor prepares nanometer class zeolite metallic organic framework compound, belong to the preparation technology of nano-particles field.
Background technology
Nano material refers to that particle diameter is that (1 ~ 100nm) ultrafine particle material has small-size effect and surface effects etc. to nanometer scale.Nanometer class zeolite metallic organic framework compound (ZIFs) is a series in the organometallics (MOF), to replace Si element and Al element in traditional zeolite molecular sieve with transition metal ions such as Zn/Cu, the derivative of imidazoles or imidazoles replaces the bridging oxygen in traditional zeolite molecular sieve, a kind zeolitic material that is connected and forms by the nitrogen-atoms on the imidazole ring.ZIFs has the high stability of inorganic zeolite and the porousness of a metal-organic complex concurrently, because its unique topological framework has huge potential application foreground in fields such as gas adsorption, catalysis, storage, optics and electromagnetism, thereby has been subject to extensive concern.Because the performance of ZIFs has extremely strong size and Structure Dependence, therefore the study hotspot for ZIFs mainly centers on how to regulate preparation process, obtains to have the more ZIFs of bigger serface, porosity, thermostability and structurally ordered property characteristics.
At present, the method of synthetic ZIFs mainly is solvent-thermal method (US2007/0202038A, CN102335626A), Liquid Phase Diffusion method (Chem Eur J, 2007,13,4146), template (J Am Chem Soc, 2004,126,13218), dynamic crystallization method (CN102220626A) etc., but these methods all in various degree have that severe reaction conditions, reaction process are loaded down with trivial details, contaminate environment and particle structure be difficult to the problems such as stable regulation and control.
The invention provides a kind of novel method of utilizing the efficient synthesis of nano class of microreactor zeolite imidazoles frame structure material (ZIFs).This microreactor is to be made up by porous-film to form, and the surface of film has aperture ratio than the micropore of homogeneous, and the liquid of film one side is by behind the micropore, with certain flow rate at the face flowing fluid, under the effect of shearing force, can form the microfacies contact conditions.The class zeolite metallic organic framework structured material of microreactor of the present invention preparation has that specific surface area is large, good dispersity, porosity advantages of higher.This method is simple to operate, energy-conserving and environment-protective, and the particle structure controllability is strong, for nanometer ZIFs material preparation provides a kind of simple and effective new way.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing microreactor to prepare nanometer class zeolite metallic organic framework compound.
According to technical scheme provided by the invention, a kind of microreactor prepares the method for nanometer class zeolite metallic organic framework compound, adopts following processing step:
(1) solution allocation: at first metal precursor is dissolved in and is mixed with the metal precursor solution A that concentration is 0.5 ~ 1mo/L in the solvent, organic ligand is dissolved in is mixed with the organic ligand solution B that concentration is 0.5 ~ 4mol/L in the solvent;
(2) mix: the both sides that metal precursor solution A and organic ligand solution B placed respectively microporous membrane, the temperature of two kinds of solution of control is 30 ~ 40 ℃, the pressure difference of film both sides is 0.02 ~ 0.08MPa, the metal precursor solution A is seen through mould uniformly enter in the organic ligand solution B, obtain the white size liquid suspension;
(3) aftertreatment: get that step (2) gained white size liquid suspension is centrifugal through 10000 ~ 12000r/min, methanol wash 2 times, obtain product nanometer class zeolite metallic organic framework compound at 80 ~ 100 ℃ of lower dry 10 ~ 12h.
Described metal precursor is zinc nitrate or cupric nitrate.Organic ligand is glyoxal ethyline or 2-ethyl imidazol(e) or imidazoles.Described organic solvent is methyl alcohol or deionized water.Described microporous membrane is that the aperture is that 0.01 ~ 10 μ m, molecular weight cut-off are 5000 ~ 50000 microporous membranes.The kit form of described microporous membrane is a kind of in flat sheet membrane, rolled film, tubular membrane or the hollow-fibre membrane.The material of described microporous membrane is polyethersulfone, polysulfones or polyvinylidene difluoride (PVDF).
The present invention has following advantage: nanoparticle provided by the invention has high specific surface area, narrow size distribution and little particle size, and its preparation technology is simple, and is easy to operate, and efficient is high, produces good reproducibility; Reaction conditions is gentle, pollutes little; Crystalline structure is controlled, complete in crystal formation, and the particle aperture is adjustable.In sum, product of the present invention has high specific surface area, the characteristics such as high thermostability and chemical stability.
Description of drawings
The class zeolite metallic organic framework compound electron scanning micrograph that Fig. 1 embodiment 2 makes.
Embodiment
Below be the embodiment that a kind of microreactor prepares the method for nanometer class zeolite metallic organic framework compound, but described embodiment is not construed as limiting the invention.
Embodiment 1
(1) solution allocation: respectively zinc nitrate and glyoxal ethyline are dissolved in methyl alcohol and are mixed with the organic ligand that metal precursor solution A that concentration is 0.5mol/L and concentration is 0.5mol/L and are dissolved in B.
(2) mix: it is 0.01 micron microfiltration membrane both sides that A solution and B solution are placed respectively the aperture, the pressure difference of controlling diaphragm both sides is 0.02MPa, making A solution see through uniformly film enters in the B solution, the control temperature of reaction is 30 ℃, used reactor kind is flat sheet membrane, and membrane material is polyethersulfone (PES).
(3) aftertreatment: with white size liquid suspension obtained above,, methanol wash centrifugal through 10000r/min 2 times obtains nanometer class zeolite metallic organic framework compound at 80 ℃ of lower dry 10h.
Recording its particle diameter is 32.44nm, and specific surface area is 980.4332m 2/ g.
Embodiment 2
(1) solution allocation: respectively zinc nitrate and 2-ethyl imidazol(e) are dissolved in deionized water and are mixed with the organic ligand that metal precursor solution A that concentration is 1mol/L and concentration is 4mol/L and are dissolved in B.
(2) mix: it is 50000 ultra-filtration membrane both sides that A solution and B solution are placed respectively molecular weight cut-off, the pressure difference of controlling diaphragm both sides is 0.08MPa, making A solution see through uniformly film enters in the B solution, the control temperature of reaction is 40 ℃, used reactor kind is rolled film, and membrane material is polysulfones (PS).
(3) aftertreatment: with white size liquid suspension obtained above,, methanol wash centrifugal through 12000r/min 2 times obtains nanometer class zeolite metallic organic framework compound at 100 ℃ of lower dry 12h.
Recording its particle diameter is 34.44nm, and specific surface area is 987.5348m 2/ g.
Embodiment 3
(1) solution allocation: respectively cupric nitrate and 2-ethyl imidazol(e) are dissolved in deionized water and are mixed with the organic ligand that metal precursor solution A that concentration is 1mol/L and concentration is 1mol/L and are dissolved in B.
(2) mix: it is 0.08 micron microfiltration membrane both sides that A solution and B solution are placed respectively the aperture, the pressure difference of controlling diaphragm both sides is 0.04MPa, making A solution see through uniformly film enters in the B solution, the control temperature of reaction is 35 ℃, used reactor kind is rolled film, and membrane material is polyvinylidene difluoride (PVDF) (PVDF).
(3) aftertreatment: with white size liquid suspension obtained above,, methanol wash centrifugal through 12000r/min 2 times obtains nanometer class zeolite metallic organic framework compound at 90 ℃ of lower dry 11h.
Recording its particle diameter is 33.56nm, and specific surface area is 1000.2225m 2/ g.
Embodiment 4
(1) solution allocation: respectively cupric nitrate and imidazoles are dissolved in methyl alcohol and are mixed with the organic ligand that metal precursor solution A that concentration is 0.6mol/L and concentration is 3mol/L and are dissolved in B.
(2) mix: it is 40000 ultra-filtration membrane both sides that A solution and B solution are placed respectively molecular weight cut-off, the pressure difference of controlling diaphragm both sides is 0.07MPa, making A solution see through uniformly film enters in the B solution, the control temperature of reaction is 30 ℃, used reactor kind is tubular membrane, and membrane material is polysulfones (PS).
(3) aftertreatment: with white size liquid suspension obtained above,, methanol wash centrifugal through 12000r/min 2 times obtains nanometer class zeolite metallic organic framework compound at 85 ℃ of lower dry 11.5h.
Recording its particle diameter is 31.57nm, and specific surface area is 1200.4562m 2/ g.
Embodiment 5
(1) solution allocation: respectively zinc nitrate and 2-ethyl imidazol(e) are dissolved in deionized water and are mixed with the organic ligand that metal precursor solution A that concentration is 0.9mol/L and concentration is 2mol/L and are dissolved in B.
(2) mix: it is 10 microns microfiltration membrane both sides that A solution and B solution are placed respectively the aperture, the pressure difference of controlling diaphragm both sides is 0.03MPa, making A solution see through uniformly film enters in the B solution, the control temperature of reaction is 30 ℃, used reactor kind is hollow-fibre membrane, and membrane material is polyethersulfone (PS).
(3) aftertreatment: with white size liquid suspension obtained above,, methanol wash centrifugal through 12000r/min 2 times obtains nanometer class zeolite metallic organic framework compound at 95 ℃ of lower dry 12h.
Recording its particle diameter is 30.66nm, and specific surface area is 1302.2379m 2/ g.
Embodiment 6
(1) solution allocation: respectively cupric nitrate and glyoxal ethyline are dissolved in methyl alcohol and are mixed with the organic ligand that metal precursor solution A that concentration is 0.8mol/L and concentration is 3mol/L and are dissolved in B.
(2) mix: it is 5000 ultra-filtration membrane both sides that A solution and B solution are placed respectively molecular weight cut-off, the pressure difference of controlling diaphragm both sides is 0.08MPa, making A solution see through uniformly film enters in the B solution, the control temperature of reaction is 40 ℃, used reactor kind is rolled film, and membrane material is polysulfones (PS).
(3) aftertreatment: with white size liquid suspension obtained above,, methanol wash centrifugal through 12000r/min 2 times obtains nanometer class zeolite metallic organic framework compound at 100 ℃ of lower dry 12h.
Recording its particle diameter is 35.78nm, and specific surface area is 1360.4356m 2/ g.

Claims (7)

1. a microreactor prepares the method for nanometer class zeolite metallic organic framework compound, it is characterized in that adopting following processing step:
(1) solution allocation: at first metal precursor is dissolved in and is mixed with the metal precursor solution A that concentration is 0.5 ~ 1mo/L in the solvent, organic ligand is dissolved in is mixed with the organic ligand solution B that concentration is 0.5 ~ 4mol/L in the solvent;
(2) mix: the both sides that metal precursor solution A and organic ligand solution B placed respectively microporous membrane, the temperature of two kinds of solution of control is 30 ~ 40 ℃, the pressure difference of film both sides is 0.02 ~ 0.08MPa, the metal precursor solution A is seen through mould uniformly enter in the organic ligand solution B, obtain the white size liquid suspension;
(3) aftertreatment: get that step (2) gained white size liquid suspension is centrifugal through 10000 ~ 12000r/min, methanol wash 2 times, obtain product nanometer class zeolite metallic organic framework compound at 80 ~ 100 ℃ of lower dry 10 ~ 12h.
2. microreactor prepares the method for nanometer class zeolite metallic organic framework compound as claimed in claim 1, and it is characterized in that: described metal precursor is zinc nitrate or cupric nitrate.
3. microreactor prepares the method for nanometer class zeolite metallic organic framework compound as claimed in claim 1, and it is characterized in that: described organic ligand is glyoxal ethyline or 2-ethyl imidazol(e) or imidazoles.
4. microreactor prepares the method for nanometer class zeolite metallic organic framework compound as claimed in claim 1, and it is characterized in that: described organic solvent is methyl alcohol or deionized water.
5. microreactor prepares the method for nanometer class zeolite metallic organic framework compound as claimed in claim 1, and it is characterized in that: described microporous membrane is that the aperture is that 0.01 ~ 10 μ m, molecular weight cut-off are 5000 ~ 50000 microporous membranes.
6. microreactor prepares the method for nanometer class zeolite metallic organic framework compound as claimed in claim 5, it is characterized in that: the kit form of described microporous membrane is a kind of in flat sheet membrane, rolled film, tubular membrane or the hollow-fibre membrane.
7. microreactor prepares the method for nanometer class zeolite metallic organic framework compound as claimed in claim 5, and it is characterized in that: the material of described microporous membrane is polyethersulfone, polysulfones or polyvinylidene difluoride (PVDF).
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CN104892404A (en) * 2014-03-05 2015-09-09 中国科学院大连化学物理研究所 Micro-channel chemical preparation method of porous metal-organic framework material
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CN108395542A (en) * 2018-04-10 2018-08-14 武汉纺织大学 A kind of MOFs nanocrystalline materials and preparation method thereof of porous membrane substrate regulation and control
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CN103464001A (en) * 2013-08-05 2013-12-25 大连理工大学 Preparation method of metal organic framework membrane for CO2 separation
US9376453B2 (en) 2014-01-03 2016-06-28 National Central University Preparation method of zeolitic imidazolate framework-90 in water-based system
CN104892404A (en) * 2014-03-05 2015-09-09 中国科学院大连化学物理研究所 Micro-channel chemical preparation method of porous metal-organic framework material
CN105622675B (en) * 2014-10-28 2018-02-09 中国石油化工股份有限公司 A kind of preparation method of high activity metal organic framework material
CN105601652A (en) * 2014-10-28 2016-05-25 中国石油化工股份有限公司 Method for preparing metal organic framework material
CN105622639A (en) * 2014-10-28 2016-06-01 中国石油化工股份有限公司 Method for preparing nanoscale Cu-based metal organic framework material
CN105622675A (en) * 2014-10-28 2016-06-01 中国石油化工股份有限公司 Preparation method for high-activity metal organic framework material
CN105601652B (en) * 2014-10-28 2018-06-19 中国石油化工股份有限公司 A kind of method for preparing metal-organic framework materials
CN104817577A (en) * 2015-04-08 2015-08-05 广东工业大学 Preparation method and catalysis applications of efficient and simple zeolite imidazole framework ZIF-8 crystals with different morphologies
CN106398686A (en) * 2016-09-05 2017-02-15 Tcl集团股份有限公司 Quantum dot and preparation method thereof
CN106632055A (en) * 2016-12-21 2017-05-10 湘潭大学 Preparation method of zeolite-like imidazole framework material and application of zeolite-like imidazole framework material in cyclohexane oxidation reaction
CN106632055B (en) * 2016-12-21 2021-03-30 湘潭大学 Preparation method of zeolite-like imidazole framework material and application of zeolite-like imidazole framework material in cyclohexane oxidation reaction
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CN108395542B (en) * 2018-04-10 2020-12-18 武汉纺织大学 MOFs nanocrystalline material regulated and controlled by porous membrane substrate and preparation method thereof
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