CN106902744B - A method of preparing MIL-100 (Fe) at room temperature - Google Patents
A method of preparing MIL-100 (Fe) at room temperature Download PDFInfo
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- CN106902744B CN106902744B CN201710095155.1A CN201710095155A CN106902744B CN 106902744 B CN106902744 B CN 106902744B CN 201710095155 A CN201710095155 A CN 201710095155A CN 106902744 B CN106902744 B CN 106902744B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/223—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material containing metals, e.g. organo-metallic compounds, coordination complexes
- B01J20/226—Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF]
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/41—Preparation of salts of carboxylic acids
- C07C51/418—Preparation of metal complexes containing carboxylic acid moieties
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4806—Sorbents characterised by the starting material used for their preparation the starting material being of inorganic character
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- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
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Abstract
The invention discloses the methods that one kind prepares MIL-100 (Fe) at room temperature, this method comprises the following steps: iron powder being placed in distilled water and is stirred, concentrated nitric acid is added, the mixed solution of 1,3,5- trimesic acids and promotor is added after stirring, then 10 ~ 12h of synthetic reaction is carried out at room temperature, after obtained yellowish-brown crude product n,N-Dimethylformamide and ethyl alcohol is rinsed several times, it is soaked in NH4Purifying is stirred in F solution, is finally dried, is obtained purified MIL-100 (Fe) adsorbent material.Method of the invention is compared with the traditional method, it can be achieved that operate at normal temperature, does not add HF, has the advantages that energy conservation and environmental protection, has good prospects for commercial application.
Description
Technical field
The invention belongs to chemical adsorbing separation Material Field, relate to a kind of to prepare iron-containing metal at room temperature
The method of organic framework material, and in particular to a method of MIL-100 (Fe) is prepared at room temperature.
Background technique
Metal organic framework (Metal-Organic Frameworks, MOFs), be by metal ion or metal cluster with have
The porous material with three-dimensional structure that machine ligand is constituted, with biggish specific surface area, composition multiplicity, pore structure can
It adjusts and the advantages that can be chemically modified as needed to it, in energy stores, gas absorption and separates, is catalyzed, senses
Multiple fields have shown good advantage, have great application prospect.
MIL series material is one kind in MOFs material.Wherein, MIL-100 (Fe) is a kind of Thermodynamically stable, environment friend
Good porous material, not only has high adsorption capacity to VOCs, has good performance to alkene-alkane separation, and be current tide
To CO under the conditions of wet2One of the maximum adsorbent material of adsorption capacity, there is good industrial application value.Currently, MIL-100
(Fe) preparation mainly passes through high temperature hydro-thermal reaction and synthesizes.Presently, there are deficiency be: in the synthesis process, need to use hydrogen
Fluoric acid [Horcajada PS, S.Serre, C.Hong, D.Y.Seo, Y.K.Chang, J.S.Greneche,
J.M.Margiolaki,I.Ferey,G.Synthesis and catalytic properties of MIL-100(Fe),an
iron(III)carboxylate with large pores.Chemical communications.2007(27):2820-
2], it is a kind of severe poisonous chemicals, there is very strong corrosivity, equipment can be corroded, and have serious harm to people;In addition,
Reaction needs high temperature, huge [Peng J, Xian S, Xiao J, Huang Y, Xia Q, Wang H, the et al.A of energy consumption
supported Cu(I)@MIL-100(Fe)adsorbent with high CO adsorption capacity and CO/
N2selectivity.Chemical Engineering Journal.2015;270:282-9].
In view of the above problems, the present invention proposes a kind of new synthesis technology, compared with original synthesis technology, it is not only not
Hydrofluoric acid is needed, but also may be implemented to synthesize MIL-100 (Fe) under normal temperature conditions, so that the cost of commercial synthesis is reduced,
It is pushed further into the industrial applications of MOFs material.
Summary of the invention
It is an object of the invention to for there are high temperature in the existing method for preparing MIL-100 (Fe) material, and use
The shortcomings that hydrofluoric acid, provides a kind of method for preparing MIL-100 (Fe) at room temperature.
The purpose of the present invention is achieved through the following technical solutions.
A method of it preparing MIL-100 (Fe) at room temperature, includes the following steps:
(1) mixed liquor for configuring iron powder and water, is then added concentrated nitric acid, stirs evenly, and A liquid is made;
(2) 1 is configured, B liquid is made in 3,5- trimesic acids/promotor aqueous solution;
(3) the resulting B liquid of step (2) is poured into A liquid made from step (1), reacts, obtains crude at room temperature
MIL-100 (Fe);
(4) crude MIL-100 (Fe) obtained by step (3) is centrifuged, then successively uses N, N- dimethyl methyl
Amide and ethyl alcohol rinse, after centrifuge separation, and obtained solid matter is soaked in NH4It is stirred in F solution, it will be resulting after filtering
Solid is dried and is activated, and the MIL-100 (Fe) of purifying is finally obtained.
Preferably, in the A liquid that step (1) is configured, iron powder, concentrated nitric acid, water molar ratio be 1:(0.37~1.2):
(167~170).
Preferably, step (2) promotor is that quinones, peroxide or piperidines nitroxide radical promote
Agent.
It is further preferred that the promotor is benzoquinones, methylbenzoquinone, H2O2, cumyl hydroperoxide or 2,2,6,6- tetra-
Methyl piperidine-nitrogen-oxide.
Preferably, in the B liquid that step (2) is configured, 1,3,5- trimesic acid, promotor, distilled water molar ratio
Are as follows:
(1) when promotor is quinones, 1,3,5- trimesic acid: promotor: distilled water=(0.66~0.68):
(0.01~0.1): (111~115);
(2) when promotor is peroxide, 1,3,5- trimesic acid: promotor: distilled water=(0.66~
0.68): (1.11~5.55): (111~115);
(3) when promotor is piperidines nitroxide radical, 1,3,5- trimesic acid: promotor: distilled water=
(0.66~0.68): (0.045~0.075): (111~115).
Preferably, the volume ratio of step (3) the B liquid and A liquid is 1:1.5~1:1, and the time of the reaction is that 7-12 is small
When.
Preferably, step (4) NH4The concentration of F solution is 25~35mmol/L.
Preferably, the time of step (4) described stirring is 8h~10h.
Preferably, step (4) activation is activation 2h~10h under 120 DEG C~150 DEG C of vacuum drying.
Compared with prior art, the present invention has the advantage that
The present invention does not need addition hydrofluoric acid, does not need to heat, and can synthesize MIL-100 at room temperature
(Fe) crystal has energy-saving and environment-friendly advantage.
Detailed description of the invention
Fig. 1 is the XRD characterization comparison diagram of the MIL-100 (Fe) of embodiment 1-3 and hydro-thermal method preparation.
Fig. 2 is the XRD spectra of MIL-100 (Fe) prepared by embodiment 4~7.
Fig. 3 be embodiment 8, embodiment 9 prepare MIL-100 (Fe) XRD spectra.
Fig. 4 is the flow chart that method of the invention prepares MIL-100 (Fe).
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples, but the scope of protection of present invention is not
It is confined to this.
The flow chart that method of the invention prepares MIL-100 (Fe) is shown in Fig. 4.
Embodiment 1
Preparation A liquid: it weighs 0.28g iron powder and is placed in 15ml distilled water, 0.13ml concentrated nitric acid is added, stirs evenly, obtains A
Liquid;
B liquid is prepared, 1,3,5- trimesic acid (BTC) of 0.7g and 5.4mg benzoquinones are weighed, 10ml distilled water is added, shakes
It shakes, ultrasound, keeps its fully dispersed, obtain B liquid;
Synthetic reaction: being poured onto B liquid in A liquid, cover, and stirs 12h.
Purifying: DMF is added and rinses, be centrifuged 3 times, is then rinsed with ethyl alcohol, centrifugation 2 times, is then transferred to solid again
40ml, concentration are the NH of 30mmol/L4In F solution, 10h is stirred, filtering, last 90 DEG C dry, and in 150 DEG C of vacuum drying
Lower activation 2h is labeled as MIL-100 (Fe) -1# to get to the MIL-100 (Fe) of the method for the present invention preparation.
Embodiment 2
Preparation A liquid: it weighs 0.28g iron powder and is placed in 15ml distilled water, 0.2ml concentrated nitric acid is added, stirs evenly, obtains A liquid;
B liquid is prepared, 1,3,5- trimesic acid (BTC) of 0.72g and 6.1mg methylbenzoquinone are weighed, 12ml distillation is added
Water rocks, ultrasound, keeps its fully dispersed, obtain B liquid;
Synthetic reaction: being poured onto B liquid in A liquid, cover, and stirs 10h.
Purifying: DMF is added and rinses, be centrifuged 3 times, is then rinsed with ethyl alcohol, centrifugation 2 times, is then transferred to solid again
40ml, concentration are the NH of 30mmol/L4In F solution, 8h is stirred, filtering, last 90 DEG C dry, and in 150 DEG C of vacuum drying
Lower activation 5h is labeled as MIL-100 (Fe) -2# to get to the MIL-100 (Fe) of the method for the present invention preparation.
Embodiment 3
Preparation A liquid: it weighs 0.28g iron powder and is placed in 15ml distilled water, 0.42ml concentrated nitric acid is added, stirs evenly, obtains A
Liquid;
B liquid is prepared, 1,3,5- trimesic acid (BTC) of 0.7g and 5.4mg benzoquinones are weighed, 12ml distilled water is added, shakes
It shakes, ultrasound, keeps its fully dispersed, obtain B liquid;
Synthetic reaction: being poured onto B liquid in A liquid, cover, and stirs 7h.
Purifying: DMF is added and rinses, be centrifuged 3 times, is then rinsed with ethyl alcohol, centrifugation 2 times, is then transferred to solid again
40ml, concentration are the NH of 28mmol/L4In F solution, 9h is stirred, filtering, last 90 DEG C dry, and in 135 DEG C of vacuum drying
Lower activation 10h is labeled as MIL-100 (Fe) -3# to get to the MIL-100 (Fe) of the method for the present invention preparation.
As shown in Figure 1, sample 1#, 2#, 3# are shown compared with the MIL-100 (Fe) that traditional hydro-thermal method is synthesized
Good X-ray diffraction peak is gone out, has shown sample 1#, 2#, 3# crystallinity is fine, proves quinones substance ought be used as promotor
When, MIL-100 (Fe) is successfully synthesized.
Embodiment 4
Preparation A liquid: it weighs 0.28g iron powder and is placed in 15ml distilled water, 0.42ml concentrated nitric acid is added, stirs evenly, obtains A
Liquid;
B liquid is prepared, 1,3,5- trimesic acid (BTC) of 0.71g is weighed, 10ml distilled water is added, and 10 μ L are added
H2O2, rock, ultrasound, keep its fully dispersed, obtain B liquid;
Synthetic reaction: being poured onto B liquid in A liquid, cover, and stirs 9.5h under the irradiation of visible light.
Purifying: DMF is added and rinses, be centrifuged 3 times, is then rinsed with ethyl alcohol, centrifugation 2 times, is then transferred to solid again
40ml, concentration are the NH of 32mmol/L4In F solution, 10h is stirred, filtering, last 90 DEG C dry, and in 120 DEG C of vacuum drying
Lower activation 10h is labeled as MIL-100 (Fe) -4# to get to the MIL-100 (Fe) of the method for the present invention preparation.
Embodiment 5
Preparation A liquid: it weighs 0.28g iron powder and is placed in 16ml distilled water, 0.42ml concentrated nitric acid is added, stirs evenly, obtains A
Liquid;
B liquid is prepared, 1,3,5- trimesic acid (BTC) of 0.7g is weighed, 10ml distilled water is added, and 25 μ L H are added2O2,
It rocks, ultrasound, keeps its fully dispersed, obtain B liquid;
Synthetic reaction: being poured onto B liquid in A liquid, cover, and stirs 12h under the irradiation of visible light.
Purifying: DMF is added and rinses, be centrifuged 3 times, is then rinsed with ethyl alcohol, centrifugation 2 times, is then transferred to solid again
40ml, concentration are the NH of 35mmol/L4In F solution, 8h is stirred, filtering, last 90 DEG C dry, and in 140 DEG C of vacuum drying
Lower activation 8h is labeled as MIL-100 (Fe) -5# to get to the MIL-100 (Fe) of the method for the present invention preparation.
Embodiment 6
Preparation A liquid: it weighs 0.28g iron powder and is placed in 14ml distilled water, 0.42ml concentrated nitric acid is added, stirs evenly, obtains A
Liquid;
B liquid is prepared, 1,3,5- trimesic acid (BTC) of 0.72g is weighed, 10ml distilled water is added, and 10 μ L peroxides are added
Change hydrogen isopropylbenzene, rocks, ultrasound, keep its fully dispersed, obtain B liquid;
Synthetic reaction: being poured onto B liquid in A liquid, cover, and continues to stir 12h under the irradiation of visible light.
Purifying: DMF is added and rinses, be centrifuged 3 times, is then rinsed with ethyl alcohol, centrifugation 2 times, is then transferred to solid again
40ml, concentration are the NH of 30mmol/L4In F solution, 10h is stirred, filtering, last 90 DEG C dry, and in 130 DEG C of vacuum drying
Lower activation 8h is labeled as MIL-100 (Fe) -6# to get to the MIL-100 (Fe) of the method for the present invention preparation.
Embodiment 7
Preparation A liquid: it weighs 0.28g iron powder and is placed in 15ml distilled water, 0.42ml concentrated nitric acid is added, stirs evenly, obtains A
Liquid;
B liquid is prepared, 1,3,5- trimesic acid (BTC) of 0.7g is weighed, 13ml distilled water is added, and 25 μ L peroxides are added
Change hydrogen isopropylbenzene, rocks, ultrasound, keep its fully dispersed, obtain B liquid;
Synthetic reaction: being poured onto B liquid in A liquid, cover, and continues to stir 9.5h under the irradiation of visible light.
Purifying: DMF is added and rinses, be centrifuged 3 times, is then rinsed with ethyl alcohol, centrifugation 2 times, is then transferred to solid again
40ml, concentration are the NH of 25mmol/L4In F solution, 9h is stirred, filtering, last 90 DEG C dry, and in 150 DEG C of vacuum drying
Lower activation 10h is labeled as MIL-100 (Fe) -7# to get to the MIL-100 (Fe) of the method for the present invention preparation.
As shown in Figure 2, sample 4#, 5#, 6#, 7# show good X-ray diffraction peak, show sample 4#, 5#,
6#, 7# crystallinity are fine, and the XRD spectra of the MIL-100 (Fe) synthesized with hydro-thermal method in Fig. 1 is similar, prove to use peroxide
When substance is as promotor, MIL-100 (Fe) is successfully synthesized.
Embodiment 8
Preparation A liquid: it weighs 0.28g iron powder and is placed in 17ml distilled water, 0.13ml concentrated nitric acid is added, stirs evenly, obtains A
Liquid;
B liquid is prepared, 1,3,5- trimesic acid (BTC) of 0.7g and 11.7mg 2,2,6,6- tetramethyl piperidines-nitrogen-are weighed
11ml distilled water is added in oxide (TEMPO), rocks, ultrasound, keeps its fully dispersed, obtain B liquid;
Synthetic reaction: being poured onto B liquid in A liquid, cover, and stirs 7h.
Purifying: DMF is added and rinses, be centrifuged 3 times, is then rinsed with ethyl alcohol, centrifugation 2 times, is then transferred to solid again
40ml, concentration are the NH of 28mmol/L4In F solution, 10h is stirred, filtering, last 90 DEG C dry, and in 150 DEG C of vacuum drying
Lower activation 6h is labeled as MIL-100 (Fe) -8# to get to the MIL-100 (Fe) of the method for the present invention preparation.
Embodiment 9
Preparation A liquid: it weighs 0.28g iron powder and is placed in 15ml distilled water, 0.13ml concentrated nitric acid is added, stirs evenly, obtains A
Liquid;
B liquid is prepared, 1,3,5- trimesic acid (BTC) of 0.7g and 7.8mg 2,2,6,6- tetramethyl piperidines-nitrogen-are weighed
10ml distilled water is added in oxide (TEMPO), rocks, ultrasound, keeps its fully dispersed, obtain B liquid;
Synthetic reaction: being poured onto B liquid in A liquid, cover, and stirs 12h.
Purifying: DMF is added and rinses, be centrifuged 3 times, is then rinsed with ethyl alcohol, centrifugation 2 times, is then transferred to solid again
40ml, concentration are the NH of 30mmol/L4In F solution, 8h is stirred, filtering, last 90 DEG C dry, and in 150 DEG C of vacuum drying
Lower activation 7h is labeled as MIL-100 (Fe) -9# to get to the MIL-100 (Fe) of the method for the present invention preparation.
As shown in Figure 3, sample 8#, 9# show good X-ray diffraction peak, show sample 8#, 9# crystallinity is very
Good, the XRD spectra of the MIL-100 (Fe) synthesized with hydro-thermal method in Fig. 1 is similar, proves to use piperidines nitroxide radical object
When matter is as promotor, MIL-100 (Fe) is successfully synthesized.
Table 1
The parameter of pore structure for the MIL-100 (Fe) that the MIL-100 (Fe) of Examples 1 to 9 preparation is prepared with hydro-thermal method is shown in
Table 1.
Claims (8)
1. the method that one kind prepares MIL-100 (Fe) at room temperature, which comprises the steps of:
(1) mixed liquor for configuring iron powder and water, is then added concentrated nitric acid, stirs evenly, and A liquid is made;
(2) 1 is configured, B liquid is made in 3,5- trimesic acids/promotor aqueous solution;
(3) the resulting B liquid of step (2) is poured into A liquid made from step (1), reacts, obtains crude at room temperature
MIL-100(Fe);
(4) crude MIL-100(Fe obtained by step (3)) is centrifuged, then successively uses n,N-Dimethylformamide
It is rinsed with ethyl alcohol, after centrifuge separation, obtained solid matter is soaked in NH4It is stirred in F solution, by resulting solid after filtering
It dries and activates, finally obtain the MIL-100 (Fe) of purifying;
Step (2) promotor is quinones, peroxide or piperidines nitroxide radical promotor.
2. the method according to claim 1, wherein in the A liquid that step (1) is configured, iron powder, concentrated nitric acid, water
Molar ratio be 1:(0.37 ~ 1.2): (167 ~ 170).
3. the method according to claim 1, wherein the promotor is benzoquinones, methylbenzoquinone, H2O2, peroxidating
Hydrogen isopropylbenzene or 2,2,6,6- tetramethyl piperidine-nitrogen-oxide.
4. the method according to claim 1, wherein in the B liquid that step (2) is configured, 1,3,5- equal benzene front three
Acid, promotor, distilled water molar ratio are as follows:
(1) when promotor is quinones, 1,3,5- trimesic acid: promotor: distilled water=(0.66 ~ 0.68): (0.01 ~
0.1): (111 ~ 115);
(2) when promotor is peroxide, 1,3,5- trimesic acid: promotor: distilled water=(0.66 ~ 0.68):
(1.11 ~ 5.55): (111 ~ 115);
(3) when promotor is piperidines nitroxide radical, 1,3,5- trimesic acid: promotor: distilled water=
(0.66 ~ 0.68): (0.045 ~ 0.075): (111 ~ 115).
5. the method according to claim 1, wherein the volume ratio of step (3) the B liquid and A liquid is 1:1 ~ 1:
1.5, the time of the reaction is 7-12 hours.
6. the method according to claim 1, wherein step (4) described NH4The concentration of F solution be 25 ~
35mmol/L。
7. the method according to claim 1, wherein the time of step (4) described stirring is 8h ~ 10h.
8. the method according to claim 1, wherein step (4) activation is in 120 DEG C ~ 150 DEG C of vacuum
Dry lower activation 2h ~ 10h.
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CN111410749B (en) * | 2020-03-17 | 2022-04-08 | 广西民族大学 | Application of nano-carrier MIL-100(Fe) in loading nitidine chloride |
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