CN104788505B - A kind of DMCoF/DMMnF heterojunction materials of metal organic frame single crystal epitaxial growth and preparation method thereof - Google Patents
A kind of DMCoF/DMMnF heterojunction materials of metal organic frame single crystal epitaxial growth and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of DMCoF/DMMnF heterojunction materials of metal organic frame single crystal epitaxial growth and preparation method thereof, it by size is 2.2 × 2.2 × 2.2~2.5 × 2.5 × 2.5 mm that the DMCoF/DMMnF heterojunction materials of metal organic frame single crystal epitaxial growth, which are,3DMMnF single crystalline substrates and size be 2.5 × 2.5 × 2.5~2.8 × 2.8 × 2.8 mm3, the hetero-junctions that thickness constitutes for 0.15~0.2 mm DMCoF epitaxy single-crystals.In preparation process of the present invention, agents useful for same is commercial product, is prepared without cumbersome；The large-sized monocrystalline of acquisition is combined using hydro-thermal method and liquid phase method；Process controllability is strong, easy to operate, and obtained product purity is high.Hetero-junctions monocrystal material obtained by the present invention, is expected to be widely used in terms of novel metal organic frame semiconductor, information storage and optics.
Description
Technical field
The present invention relates to a kind of heterojunction material of metal-organic framework single crystal epitaxial growth and preparation method thereof, specifically
Refer to a kind of monocrystalline [(CH3)2NH2]Co(HCOO)3/[(CH3)2NH2]Mn(HCOO)3Heterojunction material（It is abbreviated as DMCoF/
DMMnF, DM are [(CH3)2NH2]+1, F is [(HCOO)3]-3）And preparation method thereof.
Technical background
Metal-organic framework（Metal-Organic Frameworks, MOFs）Material is because in catalysis, hydrogen storage and optics member
There is potential application value in terms of part and receive significant attention, be a focus in current New function investigation of materials field.
Flexible, skeleton flexibility, easily cutting property and easily formation high anisotropy and low lattice are prepared because organic compound has
Advantage in terms of symmetrical structure, people attempt ferroelectricity organic matter and magnetic transition metal ions binding in recent years, if
Count out the new multi-ferroic material based on metal-organic hybrid.
The discovery of magnetoelectric effect in DMCoF and DMMnF materials, shows with magnetic metal ion mutually to tie organic ferroelectricity
Close, it will expand the exploration space of multi-ferroic material and magnetoelectric effect significantly.DMCoF and DMMnF preparation method is main
There are hydro-thermal method, liquid phase method etc..Hydro-thermal method refers in sealed pressure vessel, using water as solvent, in 100~400 °C of temperature,
Pressure is more than 0.1MPa until under conditions of tens to hundreds of MPa, making predecessor（Raw material）React and crystallize.Provide one
The special physicochemical environment that can not be obtained in atmospheric conditions, makes predecessor sufficiently be dissolved in reaction system,
Atom or molecular growth primitive are formed, nucleation is simultaneously crystallized.Hydro-thermal method has reaction speed fast, product purity height, better crystallinity degree, group
Poly- few the advantages of.At present, more than DMCoF the and DMMnF materials synthesized by hydro-thermal method based on powder crystallite and small monocrystalline, but
It is to be extremely restricted as device application, therefore how better controls over the growth of DMCoF and DMMnF monocrystalline so that monocrystalline
Size reach the requirement for being easy to making devices, and widen its industry application and have very important significance.
As people go deep into metal-organic framework materials research, people just make great efforts to epitaxial growth metal-organic bone
Frame monocrystalline is sufficiently studied, it is desirable to the size of monocrystalline can be improved by epitaxial growth metal-organic framework monocrystalline, and
Some new heterojunction materials are obtained, so as to expand the application value of metal-organic framework significantly.At present, a kind of metal-have
DMCoF/DMMnF hetero-junctions of machine frame single crystal epitaxial growth and preparation method thereof is not yet reported that.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art there is provided a kind of metal-organic framework single crystal epitaxial growth
DMCoF/DMMnF heterojunction materials and preparation method thereof.The preparation method letter of the DMCoF/DMMnF heterojunction materials simultaneously
Singly, conveniently.
The technical scheme is that：
A kind of DMCoF/DMMnF heterojunction materials of metal-organic framework single crystal epitaxial growth are 2.2 × 2.2 by size
× 2.2~2.5 × 2.5 × 2.5 mm3DMMnF single crystalline substrates and size be 2.5 × 2.5 × 2.5~2.8 × 2.8 × 2.8
mm3, the hetero-junctions that thickness constitutes for 0.15~0.2 mm DMCoF epitaxy single-crystals.
Described DMMnF monocrystalline is white clear cube monocrystalline, and chemical formula is [(CH3)2NH2] Mn (HCOO)3, institute
The DMCoF epitaxy single-crystals stated are rediance cube monocrystalline, and chemical formula is [(CH3)2NH2] Co (HCOO)3。
The DMCoF/DMMnF heterojunction materials preparation method of the metal-organic framework single crystal epitaxial growth includes following
Step：
（1）The concentrated sulfuric acid, acetone, absolute ethyl alcohol and deionized water are sequentially added in beaker, is cleaned by ultrasonic 15 minutes respectively,
To remove residual metal ions and organic matter in beaker, the beaker after cleaning is saved backup；
（2）Manganese chloride, DMF are dissolved in distilled water, stirring makes it fully dissolve；Wherein every mole
Manganese chloride correspondence distills water consumption for 7.5L, and the volume ratio of DMF and distilled water is 1：1；
（3）By step（2）Gained mixed solution loads in reactor, and 135~145 °C are heated to after sealing and is carried out instead
Should, and 60~72 hours are incubated, then naturally cool to room temperature；
（4）By step（3）Reacted manganese saturation clear liquid pipette takes out and loads step（1）The beaker cleaned
In, then beaker is put into climatic chamber；30 sections of temperature lowering curves are set, temperature range is 29~21 °C, every section of temperature difference
0.3 °C, every section of temperature range is incubated 2.5~3 hours, and humidity is 50~55%；
（5）The crystal grain of beaker bottom is washed 3 times with absolute ethyl alcohol, white is obtained within 1 hour in 60 °C of vacuum drying
Transparent DMMnF cubic crystals；
（6）Step is replaced with cobalt chloride（2）In manganese chloride, implementation steps（2）And step（3）Reacted cobalt is obtained to satisfy
And clear liquid, by step（5）The DMMnF cubic crystals of the white clear of gained are put into cobalt saturation clear liquid, according to step（4）Bar
Part reacts；
（7）According to step（5）Condition is the DMCoF/DMMnF hetero-junctions for obtaining metal-organic framework single crystal epitaxial growth
Material.
The step 4）In humidity controlled by humidifier and climatic chamber.
Beneficial effect：
In preparation process of the present invention, agents useful for same is commercial product, is prepared without cumbersome；Utilize hydro-thermal method and liquid phase method phase
With reference to the larger-sized monocrystalline of acquisition and novel metal-organic frame heterojunction material；Process controllability is strong, easy to operate, system
The product purity obtained is high.
DMCoF/DMMnF heterojunction materials obtained by the present invention, are expected in novel metal-organic frame semiconductor, information
It is widely used in terms of storage and optics.
Brief description of the drawings
Fig. 1 is DMCoF/DMMnF hetero-junctions schematic diagram of the present invention；
Fig. 2 is with DMMnF monocrystalline digital photograph produced by the present invention；
Fig. 3 is with DMCoF/DMMnF hetero-junctions monocrystalline digital photograph produced by the present invention；
Fig. 4 is X-ray diffraction (XRD) spectrogram with DMCoF/DMMnF hetero-junctions monocrystalline produced by the present invention；
Fig. 5 be with DMMnF substrate monocrystals spectrogram produced by the present invention, wherein（a）It is with DMMnF substrates produced by the present invention
Monocrystalline XPS is composed entirely,（b）It is the XPS spectrum figure with DMMnF substrate monocrystals Mn2p produced by the present invention；
Fig. 6 be with DMCoF epitaxy single-crystals spectrogram produced by the present invention, wherein（a）It is with DMCoF extensions produced by the present invention
Monocrystalline XPS is composed entirely,（b）It is the XPS spectrum figure with DMCoF epitaxy single-crystals Co2p produced by the present invention.
Embodiment
The present invention is further illustrated below in conjunction with example.
It is to be combined method using hydro-thermal method and liquid phase method that the present invention, which prepares DMCoF/DMMnF hetero-junctions monocrystal materials,.
The concentrated sulfuric acid, acetone, absolute ethyl alcohol and deionized water are sequentially added in beaker, respectively excusing from death cleaning 15 minutes, to remove in beaker
The impurity such as residual metal ions, organic matter, the beaker after cleaning is saved backup.By 2.5 mmol manganese chlorides, 15 mL N, N-
Dimethylformamide（DMF）It is dissolved in 15 mL distilled water, stirring makes it fully dissolve；The volume ratio of wherein DMF and distilled water is
1：1.Manganese chloride solution is loaded in reactor, 135~145 °C are heated to after sealing and is reacted, and is incubated 60~72
Hour, then naturally cool to room temperature.Reacted manganese saturation clear liquid pipette is taken out and is fitted into the beaker cleaned,
Then beaker is put into climatic chamber；30 sections of temperature lowering curves are set, temperature range is 29~21 °C, every section of 0.3 °C of temperature difference,
Every section of temperature range is incubated 2.5~3 hours, and humidity is 50~55%.The crystal grain of beaker bottom is washed 3 with absolute ethyl alcohol
It is secondary, the DMMnF cubic crystals for obtaining white clear for 1 hour are dried in vacuo in 60 °C.2.5 mmol cobalt chlorides are replaced into chlorination
Manganese, as above obtains reacted cobalt saturation clear liquid described in step, the white clear DMMnF cubes obtained in above-mentioned steps is brilliant
Body is put into the saturation clear liquid, and identical reaction condition, the final rediance for obtaining epitaxial growth are set in climatic chamber
DMCoF cubic crystals.
Embodiment 1
By 2.5 mmol manganese chlorides, 15 mL N,N-dimethylformamides（DMF）It is dissolved in 15 mL distilled water, stirring makes
It fully dissolves；The volume ratio of wherein DMF and distilled water is 1：1.Manganese chloride solution is loaded in reactor, added after sealing
Hot to 140 °C are reacted, and are incubated 72 hours, then naturally cool to room temperature.By reacted manganese saturation clear liquid liquid relief
Pipe is taken out and is fitted into the beaker cleaned, and then beaker is put into climatic chamber；Set 30 sections of temperature lowering curves, humidity province
Between be 29~21 °C, every section of 0.3 °C of temperature difference, every section of temperature range is incubated 2.5 hours, and humidity is 50%.By the crystal of beaker bottom
Particle is washed 3 times with absolute ethyl alcohol, and the white clear DMMnF cubic crystals obtained for 1 hour are dried in vacuo in 60 °C.By 2.5
Mmol cobalt chlorides replace manganese chloride, and reacted cobalt saturation clear liquid is as above obtained described in step, white by what is obtained in above-mentioned steps
The transparent DMMnF cubic crystals of color are put into the saturation clear liquid, and identical reaction condition is set in climatic chamber, final to obtain
Rediance DMCoF cubic crystals.
Gained DMMnF crystal is directly observed under digital camera（Such as Fig. 2）, it can be found that crystal is white transparent, chi
Very little is 2.2 × 2.2 × 2.2~2.5 × 2.5 × 2.5 mm3Cubic crystal.Fig. 4 a XRD analysis show that product is DMMnF
（Corresponding to CCDC：246991, Cambridge crystal data center）, and along 012 direction oriented growth, form monocrystalline.From Fig. 3 numbers
Code photo finds out, the rediance DMCoF monocrystalline in the successful epitaxial growth of DMMnF planes of crystal, size is 2.8 × 2.8 ×
2.8 mm3Cubic crystal, the thickness of DMCoF monocrystalline is 0.2 mm.Fig. 4 b XRD analysis show that the crystal of epitaxial growth is
DMCoF（Corresponding to CCDC：246992, Cambridge crystal data center）, and along (012) direction oriented growth, form extension
Monocrystalline hetero-junctions.It can be seen that containing Mn, O, N, C element, through XPS integrating peak areas in substrate monocrystal during Fig. 5 a XPS is composed entirely
Calculate and obtain the atomic ratio of product close to 1：6：1：5, and Mn valent state is+divalent (Fig. 5 b), shows products therefrom
Chemical formula is [(CH3)2NH2] Mn (HCOO)3.Similarly, spectrum and Co2p collection of illustrative plates (Fig. 6) show gained extension to DMCoF XPS entirely
The chemical formula of monocrystalline is [(CH3)2NH2] Co (HCOO)3。
Embodiment 2
Such as be the same as Example 1, by 2.5 mmol manganese chlorides, 15 mL DMFs（DMF）It is dissolved in 15 mL distillations
In water, stirring makes it fully dissolve；The volume ratio of wherein DMF and distilled water is 1：1.Manganese chloride solution is loaded in reactor,
145 °C are heated to after sealing to be reacted, and is incubated 60 hours, then naturally cool to room temperature.Reacted manganese is satisfied
Take out and be fitted into the beaker cleaned with clear liquid pipette, then beaker is put into climatic chamber；30 sections of drops of setting
Warm curve, temperature range is 29~21 °C, every section of 0.3 °C of temperature difference, and every section of temperature range is incubated 2 hours, and humidity is 52%.It will burn
The crystal grain of cup bottom is washed 3 times with absolute ethyl alcohol, and obtain white clear for 1 hour DMMnF cubes is dried in vacuo in 60 °C
Body crystal.2.5 mmol cobalt chlorides are replaced into manganese chloride, reacted cobalt saturation clear liquid are as above obtained described in step, by above-mentioned step
The white clear DMMnF cubic crystals obtained in rapid are put into the saturation clear liquid, set identical to react in climatic chamber
Condition, it is final to obtain DMCoF/DMMnF hetero-junctions monocrystalline.The pattern and structure of product are same as Example 1.
Embodiment 3
Such as be the same as Example 1, by 2.5 mmol manganese chlorides, 15 mL DMFs（DMF）It is dissolved in 15 mL distillations
In water, stirring makes it fully dissolve；The volume ratio of wherein DMF and distilled water is 1：1.Manganese chloride solution is loaded in reactor,
135 °C are heated to after sealing to be reacted, and is incubated 65 hours, then naturally cool to room temperature.Reacted manganese is satisfied
Take out and be fitted into the beaker cleaned with clear liquid pipette, then beaker is put into climatic chamber；30 sections of drops of setting
Warm curve, temperature range is 29~21 °C, every section of 0.3 °C of temperature difference, and every section of temperature range is incubated 3 hours, and humidity is 50%.It will burn
The crystal grain of cup bottom is washed 3 times with absolute ethyl alcohol, and obtain white clear for 1 hour DMMnF cubes is dried in vacuo in 60 °C
Body crystal.2.5 mmol cobalt chlorides are replaced into manganese chloride, reacted cobalt saturation clear liquid are as above obtained described in step, by above-mentioned step
The white clear DMMnF cubic crystals obtained in rapid are put into the saturation clear liquid, set identical to react in climatic chamber
Condition, it is final to obtain DMCoF/DMMnF hetero-junctions monocrystalline.The pattern and structure of product are same as Example 1.
Embodiment 4
Such as be the same as Example 1, by 2.5 mmol manganese chlorides, 15 mL DMFs（DMF）It is dissolved in 15 mL distillations
In water, stirring makes it fully dissolve；The volume ratio of wherein DMF and distilled water is 1：1.Manganese chloride solution is loaded in reactor,
140 °C are heated to after sealing to be reacted, and is incubated 70 hours, then naturally cool to room temperature.Reacted manganese is satisfied
Take out and be fitted into the beaker cleaned with clear liquid pipette, then beaker is put into climatic chamber；30 sections of drops of setting
Warm curve, temperature range is 29~21 °C, every section of 0.3 °C of temperature difference, and every section of temperature range is incubated 2.5 hours, and humidity is 55%, always
Coreaction 80 hours.The crystal grain of beaker bottom is washed 3 times with absolute ethyl alcohol, depth is obtained within 1 hour in 60 °C of vacuum drying
The DMCoF cubic crystals of pink.2.5 mmol cobalt chlorides are replaced into manganese chloride, reacted cobalt is as above obtained described in step
Saturation clear liquid, is put into the saturation clear liquid, in climatic chamber by the white clear DMMnF cubic crystals obtained in above-mentioned steps
Middle setting identical reaction condition, it is final to obtain DMCoF/DMMnF hetero-junctions monocrystalline.The pattern and structure of product are and embodiment
1 is identical.
Embodiment 5
Such as be the same as Example 1, by 2.5 mmol manganese chlorides, 15 mL DMFs（DMF）It is dissolved in 15 mL distillations
In water, stirring makes it fully dissolve；The volume ratio of wherein DMF and distilled water is 1：1.Manganese chloride solution is loaded in reactor,
140 °C are heated to after sealing to be reacted, and is incubated 65 hours, then naturally cool to room temperature.Reacted manganese is satisfied
Take out and be fitted into the beaker cleaned with clear liquid pipette, then beaker is put into climatic chamber；30 sections of drops of setting
Warm curve, temperature range is 29~21 °C, every section of 0.3 °C of temperature difference, and every section of temperature range is incubated 2 hours, and humidity is 55%.It will burn
The crystal grain of cup bottom is washed 3 times with absolute ethyl alcohol, and obtain white clear for 1 hour DMMnF cubes is dried in vacuo in 60 °C
Body crystal.2.5 mmol cobalt chlorides are replaced into manganese chloride, reacted cobalt saturation clear liquid are as above obtained described in step, by above-mentioned step
The white clear DMMnF cubic crystals obtained in rapid are put into the saturation clear liquid, set identical to react in climatic chamber
Condition, it is final to obtain DMCoF/DMMnF hetero-junctions monocrystalline.The pattern and structure of product are same as Example 1.
Claims (2)
1. a kind of DMCoF/DMMnF heterojunction material preparation methods of metal-organic framework single crystal epitaxial growth, the metal-
The DMCoF/DMMnF heterojunction materials of organic frame single crystal epitaxial growth by size be 2.2 × 2.2 × 2.2~2.5 × 2.5 ×
2.5 mm3DMMnF single crystalline substrates and size be 2.5 × 2.5 × 2.5~2.8 × 2.8 × 2.8 mm3, thickness is 0.15~0.2
The hetero-junctions of mm DMCoF epitaxy single-crystals composition；Described DMMnF monocrystal chemicals formula is [(CH3)2NH2] Mn (HCOO)3, institute
The DMCoF epitaxy single-crystals chemical formula stated is [(CH3)2NH2] Co (HCOO)3；
It is characterised in that it includes following step：
（1）The concentrated sulfuric acid, acetone, absolute ethyl alcohol and deionized water are sequentially added in beaker, is cleaned by ultrasonic 15 minutes respectively, to go
Except residual metal ions and organic matter in beaker, the beaker after cleaning is saved backup；
（2）Manganese chloride, DMF are dissolved in distilled water, stirring makes it fully dissolve；Wherein every mole chlorination
Manganese correspondence distills water consumption for 7.5L, and the volume ratio of DMF and distilled water is 1：1；
（3）By step（2）Gained mixed solution loads in reactor, and 135~145 °C are heated to after sealing and is reacted,
And 60~72 hours are incubated, then naturally cool to room temperature；
（4）By step（3）Reacted manganese saturation clear liquid pipette takes out and loads step（1）In the beaker cleaned, so
Beaker is put into climatic chamber afterwards；30 sections of temperature lowering curves are set, temperature range is 29~21 °C, every section of 0.3 °C of temperature difference, often
Section temperature range is incubated 2.5~3 hours, and humidity is 50~55%；
（5）The crystal grain of beaker bottom is washed 3 times with absolute ethyl alcohol, white clear is obtained within 1 hour in 60 °C of vacuum drying
DMMnF cubic crystals；
（6）Step is replaced with cobalt chloride（2）In manganese chloride, implementation steps（2）And step（3）Obtain reacted cobalt saturation clear
Liquid, by step（5）The DMMnF cubic crystals of the white clear of gained are put into cobalt saturation clear liquid, according to step（4）Condition it is anti-
Should；
（7）According to step（5）Condition is the DMCoF/DMMnF heterojunction materials for obtaining metal-organic framework single crystal epitaxial growth.
2. the preparation of the DMCoF/DMMnF heterojunction materials of metal-organic framework single crystal epitaxial growth according to claim 1
Method, it is characterised in that the step 4）In humidity controlled by humidifier and climatic chamber.
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| CN106637414A (en) * | 2016-12-15 | 2017-05-10 | 浙江理工大学 | Metal-organic framework DMMnF/strontium formate heterojunction single crystal optical material and preparation method thereof |
| CN112295866B (en) * | 2019-07-26 | 2022-03-22 | 中国科学院福建物质结构研究所 | Preparation method of all-metal organic framework van der Waals heterojunction layer film, film prepared by preparation method and application of film |
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Effective date of registration: 20200728 Address after: 423, floor 4, block a, Xinhua future city building, No. 175, Litang Road, Changping District, Beijing 102200 Patentee after: Li Qiannan Address before: 310018, No. 5, 2 Avenue, Baiyang Poplar Street, Xiasha, Zhejiang, Hangzhou Patentee before: Zhejiang University of Technology |
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Effective date of registration: 20201120 Address after: 226400 Yangkou Port Economic Development Zone, Nantong City, Jiangsu Province (Changsha Town, Rudong County) Patentee after: Jiangsu Yangkou Port Construction and Development Group Co., Ltd Address before: 423, floor 4, block a, Xinhua future city building, No. 175, Litang Road, Changping District, Beijing 102200 Patentee before: Li Qiannan |