CN106824126A - A kind of preparation method of the magnetic mesoporous imprinted material of sandwich structure of energy separating indium - Google Patents
A kind of preparation method of the magnetic mesoporous imprinted material of sandwich structure of energy separating indium Download PDFInfo
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Abstract
The present invention relates to a kind of preparation method of the magnetic mesoporous imprinted material of sandwich structure of energy separating indium, superparamagnetism Fe is synthesized using hydro-thermal method3O4Nanocluster, with reference to hexadecane trimethyl ammonium bromide template, using indium ion as template ion, using the siloxanes of band functional group as function monomer, there is the molecular engram mesoporous material of high selectivity using the synthesis of silicate class sol-gal process to indium ion.The invention has the advantages that can separating indium the magnetic mesoporous imprinted material of sandwich structure have specific recognition ability to indium, with magnetic responsiveness high, high-adsorption-capacity, the rate of adsorption high, strong anti acid alkali performance, and can realize simplifying solid-liquor separation flow to the efficiently concentrating of indium and while separation.
Description
Technical field
The present invention relates to a kind of preparation method of the magnetic mesoporous imprinted material of sandwich structure of energy separating indium, belong to material
Preparing technical field.
Background technology
The high efficiency extraction of low concentration indium is separated and typically uses extraction in solution, but existing process has high cost, pollution
Environment, technological process is long, labour intensity is big, poor continuity, be not easy to operation, separating effect and yield are also undesirable.In production
During that metal ingredient should be allowed to separate is thorough, allow it to be easy to reclaim again, and yield the higher the better.This is accomplished by improving or changes
Become original correlation technique.Adsorption technology has low, the simple to operate, good selective that consumes energy, and is capable of achieving low concentration complexity body
Indium efficiently separates in system.Therefore, it is necessary to study the imprinted material for being suitable for adsorption of Low Concentration indium.
The content of the invention
It is an object of the invention to provide a kind of preparation side of the magnetic mesoporous imprinted material of sandwich structure of energy separating indium
Method.
To achieve these goals, the present invention by the following method realize by scheme：A kind of sandwich structure of energy separating indium
The preparation method of magnetic mesoporous imprinted material, comprises the following steps：
（1）Nanometer Fe3O4The preparation of cluster：By FeCl3 .6H2O：Sodium acetate：The mass ratio of polyethylene glycol is（2.2~3.2）：
（6.5~7.8）：（1.5~2.5）, take FeCl3 .6H2O, sodium acetate and polyethylene glycol, then by above-mentioned three and the quality of ethylene glycol
Volume ratio g/mL is calculated as（10.2~13.5）：（5~500）, by FeCl3 .6H2O, sodium acetate and polyethylene glycol are added in ethylene glycol,
Magnetic agitation is allowed to dissolve, and the homogeneous yellow mixed solution that will be obtained is sealed in being transferred to polytetrafluoro hydrothermal reaction kettle, is heated to
6~72h is reacted at 160~250 DEG C, after naturally cool to room temperature, black particle thing is obtained, is washed for several times with ethanol, then carry out
Freeze-drying or vacuum drying, that is, obtain nanometer Fe3O4Cluster；This step is with ethylene glycol as solvent, polyethylene glycol as stabilizer,
Iron chloride is source of iron, controllable using solvent-thermal method size（1~600nm）, the nanometer Fe that the intensity of magnetization is high and monodispersity is good3O4
Cluster；
（2）Core shell structure Fe3O4@nSiO2The preparation of carrier：By step（1）Gained nanometer Fe3O4The cluster salt of 0.1mol/L
Ultrasonically treated 5~the 20min of acid solution, then alternately washed for several times, then by nanometer Fe with ethanol and deionized water3O4Cluster and water
The solid-to-liquid ratio g/mL for solving liquid is calculated as（0.05~0.15）:（90~100）, by the nanometer Fe after washing3O4Cluster is distributed to hydrolyzate
In, then 1~100mmol/L containing silicon ion in silicon source to system is slowly added dropwise, and 1~72h is stirred, it is scrubbed, obtain nucleocapsid knot
Structure Fe3O4@nSiO2Carrier；Add generation silicone hydroxyl (Si-OH) and Fe in the hydrolytic process of silicon source3O4The hydroxyl on surface there occurs
Condensation reaction, constantly hydrolytic condensation, finally in nanometer Fe3O4Cluster surface forms the nSiO of densification2Clad；According to waiting to locate
The acidity of solution is managed, the consumption and reaction time for changing silicon source regulate and control nSiO2The thickness of clad, if the acid of pending solution
Spend bigger, required nSiO2The thickness of clad is thicker, then the corresponding amount for adding silicon source is bigger, and the reaction time is more long；
（3）The preparation of function monomer-template molecule host-guest coordination compound：By the functional polyorganosiloxane monomer and indium ion of band functional group
Mol ratio be 1：（1.2~1.5）, the functional polyorganosiloxane monomer of band functional group is mixed with target indium ion solution, obtain work(
Can monomer-template molecule host-guest coordination compound；
（4）The preparation of polymer matrix：By core shell structure Fe3O4@nSiO2The ratio g/mmol of carrier and complex is calculated as（0.05~
0.15）:（0.15~0.25）, by step（3）Gained function monomer-template molecule host-guest coordination compound and step（2）Gained core
Shell structure Fe3O4@nSiO2Support dispersion is in condensation liquid, then the silicon source of 0.3~0.5 mass parts to system is added dropwise in stirring
In, and 1~72h is stirred, it is scrubbed to obtain polymer matrix；In slow hydrolytic condensation, progressively aggregate into containing CTAB certainly
The polymer matrix of assembling micella and indium ion dual mould plate；
（5）By acetone extraction method removing step（4）CTAB in resulting polymers parent, leaves orderly on polymer matrix
It is mesoporous, using complexing agent or acid solution as the eluant, eluent of target indium ion carry out back extraction remove indium ion, leave with target indium from
The subspace micropore that structurally and functionally site mutually matches, that is, obtain the magnetic mesoporous trace material of sandwich structure of energy separating indium
Material IIP-Fe3O4@nSiO2@mSiO2。
The step（1）Polyethylene glycol and ethylene glycol be it is purchased in market analysis it is pure.
The step（2）With（4）Silicon source for tetraethyl orthosilicate, methyl silicate, butyl silicate, positive silicic acid propyl ester or
Other silicate class, are analysis purchased in market pure.
The step（2）Hydrolyzate be made up of the component of following parts by volume：75~85 parts of ethanol, deionized water 15~25
Part, concentration are 0.5~1.5 part of the ammoniacal liquor of 28wt%.
The step（2）Ethanol for it is purchased in market analysis it is pure.
The step（3）Functional polyorganosiloxane monomer with functional group is F-CH2CH2-NHCH2CH2CH2Si(OMe)3。
The F is-COOH ,-NH2,-POOH or-SH.
The step（3）Target indium ion solution be the solution containing the mol/L of target indium ion 0.1~2, target indium
Ion is provided by its simple substance, oxide, nitric acid thing or chloride etc., by soluble solvent（Such as water or inorganic acid）After dissolving
To target indium ion solution.
The step（4）Condensation liquid including following parts by volume component：55~65 parts of ethanol, deionized water 75~85
Part, concentration are 0.5~1.5 part of the ammoniacal liquor of 28wt%, and the CTAB of 0.1~0.4 mass parts is added in liquid mixed above.
The step（5）Complexing agent be carbon tetrachloride, kerosene, methyl iso-butyl ketone (MIBK), α that concentration is 0.1~2mol/L-
One kind in hydroxyl oxime, diethyl ether, amine extractant, single alkyl phosphonic acid, single alkyl phosphonic acid-YW100 extractants, 8-hydroxyquinoline or
It is several.
The step（5）Acid solution be hydrochloric acid solution that concentration is 0.1~2mol/L.
The magnetic mesoporous imprinted material of sandwich structure of gained energy separating indium can realize target metal ions from liquid to be adsorbed
In efficiently separate, be specifically added to imprinted material as adsorbent in the liquid to be adsorbed containing target indium ion（It is to be adsorbed
Target indium ion in liquid is low concentration, 0.1~100mmol/L）, absorption 10min or so, measure absorption with ICP-OES front and rear
The concentration of metal ion in liquid to be adsorbed, calculates adsorption rate, up to more than 90%.
The adsorbent for terminating is adsorbed to be reclaimed using Magneto separate, and the washing that adds water is subsequently adding complexing agent or acid to weakly acidic pH
Solution carries out desorption indium as stripping liquid（Stripping liquid is consistent with the eluant, eluent used when synthesizing the adsorbent）, taken in different time
Sample, with concentration of metal ions, adsorption rate, up to more than 90% in ICP-OES measurement stripping liquids.After desorption terminates, adsorbent is used
Magneto separate is reclaimed, and is dried after being washed to weakly acidic pH, you can recycle.
The present invention is with superparamagnetic core-shell structure Fe3O4@SiO2It is core, with indium ion trace and with regular meso-hole structure
SiO2It is shell, the magnetic mesoporous imprinted material (IIP-Fe of the sandwich structure obtained by preparation3O4@nSiO2@mSiO2) can be auxiliary in magnetic force
Help it is lower realize nanometer indium adsorbing agent and absorption after solution efficiently separate.
The invention has the advantages that：（1）The magnetic mesoporous imprinted material of sandwich structure of gained, not only material structure set
Meter is novel, and the technology of preparing of material functional has innovation, be capable of achieving to the efficiently concentrating of indium with simplify liquid while separation
Gu separation process.（2）There is the magnetic mesoporous imprinted material of sandwich structure of gained energy separating indium magnetic responsiveness high, absorption high to hold
Amount, the rate of adsorption high, strong anti acid alkali performance, and have specific recognition ability to indium.
Specific embodiment
The present invention is further specifically described below by specific embodiment, but is not to be construed as protecting the present invention
Protect the restriction of scope.
Embodiment 1
（1）Nanometer Fe3O4The preparation of cluster：By FeCl3 .6H2O：Sodium acetate：The mass ratio of polyethylene glycol is 2.2：6.5：1.5,
Take FeCl3 .6H2O, sodium acetate and polyethylene glycol, then it is calculated as 10.2 by the mass volume ratio g/mL of above-mentioned three and ethylene glycol：5,
By FeCl3 .6H2O, sodium acetate and polyethylene glycol are added in ethylene glycol, and magnetic agitation is allowed to dissolve, and the homogeneous yellow that will be obtained is mixed
Close during solution is transferred to polytetrafluoro hydrothermal reaction kettle and seal, 72h is reacted at being heated to 160 DEG C, after naturally cool to room temperature, obtain
Black particle thing, is washed 6 times with ethanol, then carries out freeze-drying or vacuum drying, that is, obtain nanometer Fe3O4Cluster；
（2）Core shell structure Fe3O4@nSiO2The preparation of carrier：By step（1）Gained nanometer Fe3O4The cluster salt of 0.1mol/L
The ultrasonically treated 5min of acid solution, then with alternately washing 6 times of ethanol and deionized water, then by nanometer Fe3O4Cluster and hydrolyzate
Solid-to-liquid ratio g/mL is calculated as 0.05:90, by the nanometer Fe after washing3O4Cluster is distributed in hydrolyzate, then is slowly added dropwise positive silicic acid second
1mmol/L containing silicon ion in ester to system, and 1h is stirred, it is scrubbed, obtain core shell structure Fe3O4@nSiO2Carrier；The hydrolysis
Liquid is made up of the component of following parts by volume：75 parts of ethanol, 15 parts of deionized water, concentration are 0.5 part of the ammoniacal liquor of 28wt%；
（3）The preparation of function monomer-template molecule host-guest coordination compound：By the functional polyorganosiloxane monomer and indium ion of band functional group
Mol ratio be 1：1.2, by COOH-CH2CH2-NHCH2CH2CH2Si(OMe)3Mix with target indium ion solution, obtain function
Monomer-template molecule host-guest coordination compound；Wherein, target indium ion solution is the solution containing indium ion 0.1mol/L；
（4）The preparation of polymer matrix：By core shell structure Fe3O4@nSiO2The ratio g/mmol of carrier and complex is calculated as 0.05:
0.15, by step（3）Gained function monomer-template molecule host-guest coordination compound and step（2）Gained core shell structure Fe3O4@
nSiO2Support dispersion is in condensation liquid, then is added dropwise in the tetraethyl orthosilicate of 0.3 mass parts to system in stirring, and stirs 1h,
It is scrubbed to obtain polymer matrix；The condensation liquid includes the component of following parts by volume：It is 55 parts of ethanol, 75 parts of deionized water, dense
0.5 part of the ammoniacal liquor for 28wt% is spent, and the CTAB of 0.1 mass parts is added in liquid mixed above；
（5）By acetone extraction method removing step（4）CTAB in resulting polymers parent, leaves orderly on polymer matrix
Mesoporous, the carbon tetrachloride using concentration as 0.1mol/L carries out back extraction and removes indium ion as the eluant, eluent of indium ion, leaves and mesh
The micropore that mark indium ion space structure and action site are mutually matched, that is, the sandwich structure for obtaining energy separating indium is magnetic mesoporous
Imprinted material IIP-Fe3O4@nSiO2@mSiO2。
The magnetic mesoporous imprinted material of sandwich structure of gained energy separating indium can realize target metal ions from liquid to be adsorbed
In efficiently separate, be specifically added to imprinted material as adsorbent in the liquid to be adsorbed containing target indium ion（It is to be adsorbed
Indium ion concentration in liquid is 0.1mmol/L）, absorption 10min or so, measure golden in liquid to be adsorbed before and after adsorbing with ICP-OES
Belong to the concentration of ion, adsorption rate is calculated, up to 97%.
The adsorbent for terminating is adsorbed to be reclaimed using Magneto separate, and the washing that adds water is subsequently adding complexing agent or acid to weakly acidic pH
Solution carries out desorption indium ion as stripping liquid（Stripping liquid is consistent with the eluant, eluent used when synthesizing the adsorbent）, when different
Between sample, with ICP-OES measure stripping liquid in concentration of metal ions, adsorption rate, up to 96%.After desorption terminates, adsorbent uses magnetic
Separation and recovery, dries, you can recycle after being washed to weakly acidic pH.
Embodiment 2
（1）Nanometer Fe3O4The preparation of cluster：By FeCl3 .6H2O：Sodium acetate：The mass ratio of polyethylene glycol is 2.7：7.2：2, take
FeCl3 .6H2O, sodium acetate and polyethylene glycol, then it is calculated as 11.9 by the mass volume ratio g/mL of above-mentioned three and ethylene glycol：100,
By FeCl3 .6H2O, sodium acetate and polyethylene glycol are added in ethylene glycol, and magnetic agitation is allowed to dissolve, and the homogeneous yellow that will be obtained is mixed
Close during solution is transferred to polytetrafluoro hydrothermal reaction kettle and seal, 36h is reacted at being heated to 200 DEG C, after naturally cool to room temperature, obtain
Black particle thing, is washed 5 times with ethanol, then carries out freeze-drying or vacuum drying, that is, obtain nanometer Fe3O4Cluster；
（2）Core shell structure Fe3O4@nSiO2The preparation of carrier：By step（1）Gained nanometer Fe3O4The cluster salt of 0.1mol/L
The ultrasonically treated 10min of acid solution, then with alternately washing 5 times of ethanol and deionized water, then by nanometer Fe3O4Cluster and hydrolyzate
Solid-to-liquid ratio g/mL be calculated as 0.1:95, by the nanometer Fe after washing3O4Cluster is distributed in hydrolyzate, then is slowly added dropwise positive silicic acid
10mmol/L containing silicon ion in methyl esters to system, and 36h is stirred, it is scrubbed, obtain core shell structure Fe3O4@nSiO2Carrier；It is described
Hydrolyzate is made up of the component of following parts by volume：80 parts of ethanol, 20 parts of deionized water, concentration are 1 part of the ammoniacal liquor of 28wt%；
（3）The preparation of function monomer-template molecule host-guest coordination compound：By the functional polyorganosiloxane monomer and indium ion of band functional group
Mol ratio be 1：1.3, by NH2-CH2CH2-NHCH2CH2CH2Si(OMe)3Mix with target indium ion solution, obtain function list
Body-template molecule host-guest coordination compound；Wherein, target indium ion solution is the solution containing indium ion 1mol/L；
（4）The preparation of polymer matrix：By core shell structure Fe3O4@nSiO2The ratio g/mmol of carrier and complex is calculated as 0.1:
0.2, by step（3）Gained function monomer-template molecule host-guest coordination compound and step（2）Gained core shell structure Fe3O4@nSiO2
Support dispersion is in condensation liquid, then is added dropwise in the methyl silicate of 0.4 mass parts to system in stirring, and stirs 36h, through washing
Wash and obtain polymer matrix；The condensation liquid includes the component of following parts by volume：60 parts of ethanol, 80 parts of deionized water, concentration are
1 part of the ammoniacal liquor of 28wt%, and the CTAB of 0.3 mass parts is added in liquid mixed above；
（5）By acetone extraction method removing step（4）CTAB in resulting polymers parent, leaves orderly on polymer matrix
Mesoporous, the hydrochloric acid solution using concentration as 1mol/L carries out back extraction and removes indium ion as the eluant, eluent of indium ion, leaves and target
The micropore that indium ion space structure and action site are mutually matched, that is, obtain the magnetic mesoporous print of sandwich structure of energy separating indium
Mark material IIP-Fe3O4@nSiO2@mSiO2。
The magnetic mesoporous imprinted material of sandwich structure of gained energy separating indium can realize target metal ions from liquid to be adsorbed
In efficiently separate, be specifically added to imprinted material as adsorbent in the liquid to be adsorbed containing indium ion（In liquid to be adsorbed
Target indium ion concentration be 10mmol/L）, absorption 10min or so, measured with ICP-OES and adsorb metal in front and rear liquid to be adsorbed
The concentration of ion, calculates adsorption rate, up to 98%.
The adsorbent for terminating is adsorbed to be reclaimed using Magneto separate, and the washing that adds water is subsequently adding complexing agent or acid to weakly acidic pH
Solution carries out desorption indium ion as stripping liquid（Stripping liquid is consistent with the eluant, eluent used when synthesizing the adsorbent）, when different
Between sample, with ICP-OES measure stripping liquid in concentration of metal ions, adsorption rate, up to 98%.After desorption terminates, adsorbent uses magnetic
Separation and recovery, dries, you can recycle after being washed to weakly acidic pH.
Embodiment 3
（1）Nanometer Fe3O4The preparation of cluster：By FeCl3 .6H2O：Sodium acetate：The mass ratio of polyethylene glycol is 3.2： 7.8：2.5,
Take FeCl3 .6H2O, sodium acetate and polyethylene glycol, then it is calculated as 13.5 by the mass volume ratio g/mL of above-mentioned three and ethylene glycol：
500, by FeCl3 .6H2O, sodium acetate and polyethylene glycol are added in ethylene glycol, and magnetic agitation is allowed to dissolve, the homogeneous Huang that will be obtained
Mixture of colours solution is sealed in being transferred to polytetrafluoro hydrothermal reaction kettle, and 1h is reacted at being heated to 250 DEG C, after naturally cool to room temperature,
Black particle thing is obtained, is washed for several times with ethanol, then carry out freeze-drying or vacuum drying, that is, obtain nanometer Fe3O4Cluster；
（2）Core shell structure Fe3O4@nSiO2The preparation of carrier：By step（1）Gained nanometer Fe3O4The cluster salt of 0.1mol/L
The ultrasonically treated 20min of acid solution, then alternately washed for several times, then by nanometer Fe with ethanol and deionized water3O4Cluster and hydrolyzate
Solid-to-liquid ratio g/mL be calculated as 0.15:100, by the nanometer Fe after washing3O4Cluster is distributed in hydrolyzate, then is slowly added dropwise positive silicon
100mmol/L containing silicon ion in acid butyl ester to system, and 72h is stirred, it is scrubbed, obtain core shell structure Fe3O4@nSiO2Carrier；
The hydrolyzate is made up of the component of following parts by volume：85 parts of ethanol, 25 parts of deionized water, concentration are the ammoniacal liquor 1.5 of 28wt%
Part；
（3）The preparation of function monomer-template molecule host-guest coordination compound：By the functional polyorganosiloxane monomer and indium ion of band functional group
Mol ratio be 1：1.5, by POOH-CH2CH2-NHCH2CH2CH2Si(OMe)3Mix with target indium ion solution, obtain function
Monomer-template molecule host-guest coordination compound；Wherein, target indium ion solution is the solution containing indium ion 2mol/L；
（4）The preparation of polymer matrix：By core shell structure Fe3O4@nSiO2The ratio g/mmol of carrier and complex is calculated as 0.15:
0.25, by step（3）Gained function monomer-template molecule host-guest coordination compound and step（2）Gained core shell structure Fe3O4@
nSiO2Support dispersion is in condensation liquid, then is added dropwise in the butyl silicate of 0.5 mass parts to system in stirring, and stirs
72h, it is scrubbed to obtain polymer matrix；The condensation liquid includes the component of following parts by volume：65 parts of ethanol, deionized water 85
Part, concentration are 1.5 parts of the ammoniacal liquor of 28wt%, and the CTAB of 0.4 mass parts are added in liquid mixed above；
（5）By acetone extraction method removing step（4）CTAB in resulting polymers parent, leaves orderly on polymer matrix
Mesoporous, α-hydroxyl oxime and single alkyl phosphonic acid-YW100 extractants using concentration as 2mol/L are carried out as the eluant, eluent of target indium ion
Back extraction removes indium ion, leaves the micropore mutually matched with target indium ion space structure and action site, that is, obtain dividing
From the magnetic mesoporous imprinted material IIP-Fe of the sandwich structure of indium3O4@nSiO2@mSiO2。
The magnetic mesoporous imprinted material of sandwich structure of gained energy separating indium can realize target metal ions from liquid to be adsorbed
In efficiently separate, be specifically added to imprinted material as adsorbent in the liquid to be adsorbed containing indium ion（In liquid to be adsorbed
Indium ion concentration be 100mmol/L）, absorption 10min or so, with ICP-OES measure before and after absorption in liquid to be adsorbed metal from
The concentration of son, calculates adsorption rate, up to 96%.
The adsorbent for terminating is adsorbed to be reclaimed using Magneto separate, and the washing that adds water is subsequently adding complexing agent or acid to weakly acidic pH
Solution carries out desorption indium ion as stripping liquid（Stripping liquid is consistent with the eluant, eluent used when synthesizing the adsorbent）, when different
Between sample, with ICP-OES measure stripping liquid in concentration of metal ions, adsorption rate, up to 97%.After desorption terminates, adsorbent uses magnetic
Separation and recovery, dries, you can recycle after being washed to weakly acidic pH.
Claims (9)
1. it is a kind of can separating indium the magnetic mesoporous imprinted material of sandwich structure preparation method, it is characterised in that including following step
Suddenly：
（1）Nanometer Fe3O4The preparation of cluster：By FeCl3 .6H2O：Sodium acetate：The mass ratio of polyethylene glycol is（2.2~3.2）：
（6.5~7.8）：（1.5~2.5）, take FeCl3 .6H2O, sodium acetate and polyethylene glycol, then by above-mentioned three and the quality of ethylene glycol
Volume ratio g/mL is calculated as（10.2~13.5）：（5~500）, by FeCl3 .6H2O, sodium acetate and polyethylene glycol are added in ethylene glycol,
Magnetic agitation is allowed to dissolve, the mixed solution sealing that will be obtained, and 6~72h is reacted at being heated to 160~250 DEG C, treats natural cooling
To room temperature, black particle thing is obtained, washed for several times with ethanol, then carry out freeze-drying or vacuum drying, that is, obtain nanometer Fe3O4
Cluster；
（2）Core shell structure Fe3O4@nSiO2The preparation of carrier：By step（1）Gained nanometer Fe3O4The cluster hydrochloric acid of 0.1mol/L
Ultrasonically treated 5~the 20min of solution, then alternately washed for several times, then by nanometer Fe with ethanol and deionized water3O4Cluster and hydrolysis
The solid-to-liquid ratio g/mL of liquid is calculated as（0.05~0.15）:（90~100）, by the nanometer Fe after washing3O4Cluster is distributed to hydrolyzate
In, then 1~100mmol/L containing silicon ion in silicon source to system is slowly added dropwise, and 1~72h is stirred, it is scrubbed, obtain nucleocapsid knot
Structure Fe3O4@nSiO2Carrier；
（3）The preparation of function monomer-template molecule host-guest coordination compound：By the functional polyorganosiloxane monomer and indium ion of band functional group
Mol ratio be 1：（1.2~1.5）, the functional polyorganosiloxane monomer of band functional group is mixed with target indium ion solution, obtain work(
Can monomer-template molecule host-guest coordination compound；
The silicon source is tetraethyl orthosilicate, methyl silicate, butyl silicate, positive silicic acid propyl ester or other silicate class；
（4）The preparation of polymer matrix：By core shell structure Fe3O4@nSiO2The ratio g/mmol of carrier and complex is calculated as（0.05~
0.15）:（0.15~0.25）, by step（3）Gained function monomer-template molecule host-guest coordination compound and step（2）Gained core
Shell structure Fe3O4@nSiO2Support dispersion is in condensation liquid, then the silicon source of 0.3~0.5 mass parts to system is added dropwise in stirring
In, and 1~72h is stirred, it is scrubbed to obtain polymer matrix；
The silicon source is tetraethyl orthosilicate, methyl silicate, butyl silicate, positive silicic acid propyl ester or other silicate class；
（5）By acetone extraction method removing step（4）CTAB in resulting polymers parent, using complexing agent or acid solution as washing
De- agent carries out back extraction and removes indium ion, that is, obtain the magnetic mesoporous imprinted material of sandwich structure of energy separating indium.
2. it is according to claim 1 can separating indium the magnetic mesoporous imprinted material of sandwich structure preparation method, it is special
Levy and be：It is pure that the polyethylene glycol, ethylene glycol and ethanol are analysis purchased in market.
3. it is according to claim 1 can separating indium the magnetic mesoporous imprinted material of sandwich structure preparation method, it is special
Levy and be：The step（2）Hydrolyzate be made up of the component of following parts by volume：75~85 parts of ethanol, deionized water 15~25
Part, concentration are 0.5~1.5 part of the ammoniacal liquor of 28wt%.
4. it is according to claim 1 can separating indium the magnetic mesoporous imprinted material of sandwich structure preparation method, it is special
Levy and be：The step（3）Functional polyorganosiloxane monomer with functional group is F-CH2CH2-NHCH2CH2CH2Si(OMe)3。
5. it is according to claim 4 can separating indium the magnetic mesoporous imprinted material of sandwich structure preparation method, it is special
Levy and be：The F is-COOH ,-NH2,-POOH or-SH.
6. it is according to claim 1 can separating indium the magnetic mesoporous imprinted material of sandwich structure preparation method, it is special
Levy and be：The step（3）Target indium ion solution be the solution containing the mol/L of target indium ion 0.1~2.
7. it is according to claim 1 can separating indium the magnetic mesoporous imprinted material of sandwich structure preparation method, it is special
Levy and be：The step（4）Condensation liquid including following parts by volume component：55~65 parts of ethanol, 75~85 parts of deionized water,
Concentration is 0.5~1.5 part of the ammoniacal liquor of 28wt%, and the CTAB of 0.1~0.4 mass parts is added in liquid mixed above.
8. it is according to claim 1 can separating indium the magnetic mesoporous imprinted material of sandwich structure preparation method, it is special
Levy and be：The step（5）Complexing agent be carbon tetrachloride, kerosene, methyl iso-butyl ketone (MIBK), α that concentration is 0.1~2mol/L-
One kind in hydroxyl oxime, diethyl ether, amine extractant, single alkyl phosphonic acid, single alkyl phosphonic acid-YW100 extractants, 8-hydroxyquinoline or
It is several.
9. it is according to claim 1 can separating indium the magnetic mesoporous imprinted material of sandwich structure preparation method, it is special
Levy and be：The step（5）Acid solution be hydrochloric acid solution that concentration is 0.1~2mol/L.
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