CN104086719B - A kind of preparation method of ferroso-ferric oxide/polystyrene/silver nano-complex particle - Google Patents
A kind of preparation method of ferroso-ferric oxide/polystyrene/silver nano-complex particle Download PDFInfo
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- CN104086719B CN104086719B CN201410309874.5A CN201410309874A CN104086719B CN 104086719 B CN104086719 B CN 104086719B CN 201410309874 A CN201410309874 A CN 201410309874A CN 104086719 B CN104086719 B CN 104086719B
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Abstract
The invention discloses the preparation method of a kind of ferroso-ferric oxide/polystyrene/silver nano-complex particle, the method can be prevented effectively from Nano silver grain and reunite, one layer of nano grain of silver sublayer is formed in polystyrene shell layer surface, and combine the magnetic property of ferroso-ferric oxide, this nano composite material is finally made to have detection, separating property, as the substrate of surface enhanced raman spectroscopy, as conventional analytical technology, there is great impetus for surface enhanced raman spectroscopy.
Description
Technical field
The invention belongs to organic-inorganic nanocomposite materials technical field, relate to a kind of multi-functional ferroso-ferric oxide/polyphenyl
Ethylene/silver nanoparticle compound particle is as the preparation method of surface enhanced raman spectroscopy substrate.
Background technology
Organic-inorganic nanocomposite materials increasingly receives publicity, and is primarily due to this composite and combines inorganic material
Material and the premium properties of organic material, therefore can be widely applied to automobile, building materials, space flight, aviation, the energy, environmental protection, biological doctor
Etc. key areas.
Since within 1973, observing surface enhanced raman spectroscopy phenomenon for the first time, the always study hotspot of people.Table
Face enhancing Raman scattering, as a powerful spectral technique, can be widely used, including analysis in different fields
Chemistry, medical chemistry, characterize microchemistry and life sciences etc..Surface enhanced raman spectroscopy mainly by incident light source with
The surface plasma near field polarization that the interaction of surface-enhanced Raman scattering activity substrate produces, thus produce Electromagnetic enhancement, because of
This its Raman spectrum often by as extremely sensitive analytical technology, is applied to biochemistry, Chemical Manufacture and environmental monitoring.Right
In specific molecule, surface enhanced raman spectroscopy can provide specific vibration characteristics, and relevant with structure and functional group
Chemical bond information.
Traditional surface-enhanced Raman scattering activity substrate great majority are all disposable, due to gold, silver etc. costly,
Therefore make it cannot function as the analytical technology of a kind of routine to use, thus limit the development of surface enhanced raman spectroscopy substrate.
Summary of the invention
It is an object of the invention to provide a kind of multi-functional four oxidations three having detection, separation, reusable edible characteristic concurrently
Ferrum/polystyrene/silver nano-complex particle is as the preparation method of surface enhanced raman spectroscopy substrate.
Multi-functional ferroso-ferric oxide/polystyrene/silver the nano-complex particle of the present invention is as surface enhanced raman spectroscopy
The preparation method of substrate, it is characterised in that comprise the steps:
(1), the preparation of ferriferrous oxide nano-particle
Iron chloride, sodium acetate are added according to mass ratio 1:3.5 in the mixed solvent of ethylene glycol and ethylenediamine, stir under room temperature
Mixing 0.5～1 hour, during then reactor transferred to by mixed liquor, 180～200 DEG C are reacted 12～24 hours, and product centrifugation depends on
Secondary dehydrated alcohol and deionized water wash, 50～80 DEG C of vacuum drying, obtain ferriferrous oxide nano-particle；
(2), the preparation of ferroso-ferric oxide/silica dioxide composite particles
The ferriferrous oxide nano-particle of preparation in step (1) is joined ethanol, deionized water, 28wt% ammonia mixed
Close in solution, be then added dropwise over tetraethyl orthosilicate, stir 5～7 hours, product centrifugation, with absolute ethanol washing, 40～
60 DEG C of vacuum drying obtain ferroso-ferric oxide/silica dioxide composite particles；
(3), 3-(isobutene. acyl-oxygen) ferroso-ferric oxide/silica dioxide composite particles of modifying of propyl trimethoxy silicane
Preparation
Ferroso-ferric oxide/the silica dioxide composite particles of preparation in step (2) is joined 3-(isobutene. acyl-oxygen) propyl group
In the mixed solution of trimethoxy silane and dehydrated alcohol, stir 24～48 hours under room temperature, after reaction terminates, centrifugal point of product
From, with absolute ethanol washing, 40～60 DEG C of vacuum drying obtain 3-(isobutene. acyl-oxygen) propyl trimethoxy silicane modify four
Fe 3 O/silica dioxide composite particles；
(4), the preparation of ferroso-ferric oxide/polystyrene colloid particle
The compound particle of preparation in step (3) is distributed in the mixed solution of deionized water and sodium lauryl sulphate,
It is passed through nitrogen 0.5～1.5 hours, adds styrene and the mixed solution of divinylbenzene, then lead to nitrogen 10～40 minutes, 60
～the potassium persulfate solution added at 80 DEG C, react 5～10 hours, product centrifugation, with absolute ethanol washing, 50～80 DEG C
Vacuum drying obtains ferroso-ferric oxide/polystyrene colloid particle；
(5), the preparation of ferroso-ferric oxide/polystyrene/silver nano-complex particle
The ferroso-ferric oxide prepared in step (4)/polystyrene colloid particle is distributed in phosphate buffer, adds
Enter polymine, stir 0.5～1.5 hour under room temperature, product washing with alcohol, the particle after washing is re-dispersed into
In ionized water, adding silver nitrate, after 10～30 minutes, centrifugation, with absolute ethanol washing, the particle redispersion obtained is to going
In ionized water, 80～100 DEG C are heated 0.5～1.5 hour, and product centrifugation, with absolute ethanol washing, obtains four oxidations three
Ferrum/polystyrene/silver nano-complex particle.
In technique scheme, described prepare ferriferrous oxide nano-particle during, described ethylene glycol and second
In the mixed solvent of diamidogen, the volume ratio of ethylene glycol and ethylenediamine is 2:1, wherein ethylene glycol consumption be iron chloride and sodium acetate total
3～6 times of quality.
In technique scheme, described prepare ferroso-ferric oxide/silica dioxide composite particles during, described nothing
In water-ethanol, deionized water, 28wt% ammonia water mixture, the volume ratio of three is 1:0.1～0.25:0.01～0.0125, wherein
Dehydrated alcohol consumption is 300～800 times of the ferriferrous oxide nano-particle quality added, and tetraethyl orthosilicate consumption is add
0.1～0.3 times of ferriferrous oxide nano-particle quality.
In technique scheme, described prepares 3-(isobutene. acyl-oxygen) propyl trimethoxy silicane modify four oxidation three
During ferrum/silica dioxide composite particles, described 3-(isobutene. acyl-oxygen) propyl trimethoxy silicane and dehydrated alcohol
In mixed solution, the volume of dehydrated alcohol is 3-(isobutene. acyl-oxygen) 100～150 times of propyl trimethoxy silicane, dehydrated alcohol
Consumption is 600～1600 times of the ferroso-ferric oxide/silica dioxide composite particles quality added.
In technique scheme, described prepare ferroso-ferric oxide/polystyrene colloid particle during, described goes
In ionized water and sodium lauryl sulphate mixed liquor, both mass ratioes are 5000:1, and wherein deionized water consumption is the 3-added
The 300～800 of ferroso-ferric oxide/silica dioxide composite particles quality that (isobutene. acyl-oxygen) propyl trimethoxy silicane is modified
Times, in the styrene of addition and divinylbenzene mixed liquor, both volume ratios are 1:0.04, and the most cinnamic consumption is to add
The 3-(isobutene. acyl-oxygen entered) propyl trimethoxy silicane modify ferroso-ferric oxide/silica dioxide composite particles quality 20～
40 times, the concentration of potassium persulfate solution is 0.01～0.05g/ml, and its consumption is the 3-(isobutene. acyl-oxygen added) propyl group front three
0.5～2 times of ferroso-ferric oxide/silica dioxide composite particles quality that TMOS is modified.
In technique scheme, described prepare ferroso-ferric oxide/polystyrene/silver nano-complex particle during,
The pH value of described phosphate buffer solution is 8, and the consumption of polymine is the ferroso-ferric oxide/polystyrene colloid grain added
0.1～0.2 times of protonatomic mass, the consumption of silver nitrate be add ferroso-ferric oxide/polystyrene colloid mass particle 0.1～
0.2 times.
The characteristic of the present invention is:
Reunite by means of the invention it is also possible to be prevented effectively from Nano silver grain, and rely on polymine
Adhesiveness, can form the silver nanoparticle shell of one layer of dense uniform at polystyrene surface.
Surface enhanced raman spectroscopy substrate prepared by this method, owing to ferroso-ferric oxide is as core, so this substrate has
Magnetic property, so that active matrix can be to separate under outside magnetic field effect from solution, it is achieved recycle.
Surface enhanced raman spectroscopy substrate prepared by this method has the highest sensitivity, can be with the organic dirt of selective enumeration method
Dye thing, and the enhancer of this active matrix is the highest, such that it is able to effectively detect organic pollution.
The surface enhanced raman spectroscopy substrate of the present invention may be used for detection and separates Some Organic Pollutants, such as Luo Dan
Bright 6G, two English, p-aminophenyl thiophenol etc., have the highest use value.
Specific implementation method
In order to be illustrated more clearly that the present invention, enumerate following example, but it is without any restrictions to the present invention.
Embodiment one
(1) preparation of ferriferrous oxide nano-particle
0.5g iron chloride, 1.75g sodium acetate are joined in the mixed solvent of 10ml ethylene glycol, 5ml ethylenediamine, under room temperature
Stirring 30 minutes, then mixed liquor is transferred in reactor 200 DEG C and reacts 24 hours, product centrifugation, successively with anhydrous
Ethanol and deionized water wash, 80 DEG C of vacuum drying, obtain ferriferrous oxide nano-particle；
(2) preparation of ferroso-ferric oxide/silica dioxide composite particles
The ferriferrous oxide nano-particle 0.1g of preparation in step (1) is joined 80ml dehydrated alcohol, 8ml deionization
Water, 0.8ml 28wt% ammonia mixed solution in, be then added dropwise over 12 l tetraethyl orthosilicates, be stirred at room temperature 6 hours, product
Centrifugation, with absolute ethanol washing, 50 DEG C of vacuum drying, obtains ferroso-ferric oxide/silica dioxide composite particles；
(3) 3-(isobutene. acyl-oxygen) ferroso-ferric oxide/silica dioxide composite particles of modifying of propyl trimethoxy silicane
Preparation
Ferroso-ferric oxide/silica dioxide composite particles the 40mg of preparation in step (2) is added to 0.8ml 3-(methacryloyl
Oxygen) propyl trimethoxy silicane, 800ml dehydrated alcohol mixed solution in, under room temperature stir 48 hours, reaction terminate after, produce
Thing centrifugation, with absolute ethanol washing, 50 DEG C of vacuum drying obtain 3-(isobutene. acyl-oxygen) propyl trimethoxy silicane modification
Ferroso-ferric oxide/silica dioxide composite particles；
(4) preparation of ferroso-ferric oxide/polystyrene colloid particle
The compound particle 25mg of preparation in step (3) is distributed to 15g deionized water, 3mg sodium lauryl sulphate mixed
Close in solution, be passed through nitrogen 30 minutes, add 1ml styrene, the mixed liquor of 40 l divinylbenzene, then lead to nitrogen 15 minutes,
Add the potassium persulfate solution of 1.0ml, 0.04g/ml at 70 DEG C, react 7 hours, product centrifugation, with absolute ethanol washing,
50 DEG C of vacuum drying obtain ferroso-ferric oxide/polystyrene colloid particle；
(5) preparation of ferroso-ferric oxide/polystyrene/silver nano-complex particle
Ferroso-ferric oxide step (4) prepared/polystyrene colloid particle 20mg is distributed to the phosphoric acid buffer that pH value is 8
In solution, adding 2mg polymine, stir 1 hour under room temperature, product dehydrated alcohol washs, by the grain after washing
Son is re-dispersed in deionized water, adds 4mg silver nitrate, after 10 minutes, product centrifugation, with absolute ethanol washing,
The particle redispersion obtained, in deionized water, heats 1 hour at 100 DEG C, product centrifugation, with absolute ethanol washing,
To ferroso-ferric oxide/polystyrene/silver nano-complex particle.
Embodiment two
(1) preparation of ferriferrous oxide nano-particle
1.0g iron chloride, 3.5g sodium acetate are joined in the mixed solvent of 24ml ethylene glycol, 12ml ethylenediamine, room temperature
Lower stirring 40 minutes, then transfers to mixed liquor react 24 hours at 200 DEG C in reactor, product centrifugation, uses successively
Absolute ethanol washing, 80 DEG C of vacuum drying, obtain ferriferrous oxide nano-particle；
(2) preparation of ferroso-ferric oxide/silica dioxide composite particles
The ferriferrous oxide nano-particle 0.1g of preparation in step (1) is joined 100ml dehydrated alcohol, 25ml go from
Sub-water, 1.25ml 28wt% ammonia mixed solution in, be then added dropwise over 24 μ l tetraethyl orthosilicates, be stirred at room temperature 7 hours,
Product centrifugation, with absolute ethanol washing, 60 DEG C of vacuum drying, obtains ferroso-ferric oxide/silica dioxide composite particles；
(3) 3-(isobutene. acyl-oxygen) ferroso-ferric oxide/silica dioxide composite particles of modifying of propyl trimethoxy silicane
Preparation
Ferroso-ferric oxide/silica dioxide composite particles the 40mg of preparation in step (2) is added to 0.4ml 3-(isobutene.
Acyl-oxygen) propyl trimethoxy silicane, 50ml dehydrated alcohol mixed solution in, under room temperature stir 48 hours, reaction terminate after, produce
Thing centrifugation, with absolute ethanol washing, 50 DEG C of vacuum drying obtain 3-(isobutene. acyl-oxygen) propyl trimethoxy silicane modification
Ferroso-ferric oxide/silica dioxide composite particles；
(4) preparation of ferroso-ferric oxide/polystyrene colloid particle
The compound particle 25mg of preparation in step (3) is distributed to 10g deionized water, 2mg sodium lauryl sulphate mixed
Close in solution, be passed through nitrogen 30 minutes, add 0.8ml styrene, the mixed liquor of 32 l divinylbenzene, then lead to nitrogen 20 points
Clock, adds the potassium persulfate solution of 1.6ml, 0.03g/ml, reacts 7 hours, product centrifugation, wash with dehydrated alcohol at 70 DEG C
Washing, 50 DEG C of vacuum drying obtain ferroso-ferric oxide/polystyrene colloid particle；
(5) preparation of ferroso-ferric oxide/polystyrene/silver nano-complex particle
Ferroso-ferric oxide step (4) prepared/polystyrene colloid particle 20mg is distributed to the phosphoric acid that pH value is 8 and delays
In dissolved liquid, add 3mg polymine, stir 1.5 hours under room temperature, product dehydrated alcohol washs, after washing
Particle be re-dispersed in deionized water, add 3mg silver nitrate, after 20 minutes, product centrifugation, wash with dehydrated alcohol
Wash, in the particle redispersion obtained to deionized water, heat 1 hour at 90 DEG C, product centrifugation, with absolute ethanol washing,
Obtain ferroso-ferric oxide/polystyrene/silver nano-complex particle.
Embodiment three
(1) preparation of ferriferrous oxide nano-particle
0.5g iron chloride, 1.75g sodium acetate are joined in the mixed solvent of 8ml ethylene glycol, 4ml ethylenediamine, under room temperature
Stir 30 minutes, then transfer to mixed liquor reactor reacts 24 hours at 200 DEG C, product centrifugation, use anhydrous second
Alcohol washs, and 60 DEG C of vacuum drying obtain ferriferrous oxide nano-particle；
(2) preparation of ferroso-ferric oxide/silica dioxide composite particles
The ferriferrous oxide nano-particle 0.1g of preparation in step (1) is joined 40ml dehydrated alcohol, 8ml deionization
Water, 0.5ml 28wt% ammonia mixed solution in, be then added dropwise over 30 l tetraethyl orthosilicates, be stirred at room temperature 6 hours, product
Centrifugation, with absolute ethanol washing, 60 DEG C of vacuum drying, obtains ferroso-ferric oxide/silica dioxide composite particles；
(3) 3-(isobutene. acyl-oxygen) ferroso-ferric oxide/silica dioxide composite particles of modifying of propyl trimethoxy silicane
Preparation
Ferroso-ferric oxide/silica dioxide composite particles the 40mg of preparation in step (2) is added to 0.3ml 3-(isobutene.
Acyl-oxygen) propyl trimethoxy silicane, 40ml dehydrated alcohol mixed solution in, under room temperature stir 48 hours, reaction terminate after, produce
Thing centrifugation, with absolute ethanol washing, 50 DEG C of vacuum drying obtain 3-(isobutene. acyl-oxygen) propyl trimethoxy silicane modification
Ferroso-ferric oxide/silica dioxide composite particles；
(4) preparation of ferroso-ferric oxide/polystyrene colloid particle
The compound particle 25mg of preparation in step (3) is distributed to 20g deionized water, 4mg sodium lauryl sulphate mixed
Close in solution, be passed through nitrogen 30 minutes, add 0.6ml styrene, the mixed liquor of 24 l divinylbenzene, then lead to nitrogen 20 points
Clock, adds the potassium persulfate solution of 0.5ml, 0.03g/ml, reacts 8 hours, product centrifugation, wash with dehydrated alcohol at 70 DEG C
Washing, 50 DEG C of vacuum drying obtain ferroso-ferric oxide/polystyrene colloid particle；
(5) preparation of ferroso-ferric oxide/polystyrene/silver nano-complex particle
Ferroso-ferric oxide step (4) prepared/polystyrene colloid particle 20mg is distributed to the phosphoric acid that pH value is 8 and delays
In dissolved liquid, adding 4mg polymine, stir 1.5 hours under room temperature, product dehydrated alcohol washs, after washing
Particle be re-dispersed in deionized water, add 2mg silver nitrate, after 20 minutes, product centrifugation, wash with dehydrated alcohol
Wash, in the particle redispersion obtained to deionized water, heat 1 hour at 90 DEG C, product centrifugation, with absolute ethanol washing,
Obtain ferroso-ferric oxide/polystyrene/silver nano-complex particle.
Embodiment four
(1) preparation of ferriferrous oxide nano-particle
1.5g iron chloride, 5.25g sodium acetate are joined in the mixed solvent of 20ml ethylene glycol, 10ml ethylenediamine, room temperature
Lower stirring 40 minutes, then transfers to mixed liquor react 24 hours at 200 DEG C in reactor, and product centrifugation, with anhydrous
Washing with alcohol, 60 DEG C of vacuum drying, obtain ferriferrous oxide nano-particle；
(2) preparation of ferroso-ferric oxide/silica dioxide composite particles
The ferriferrous oxide nano-particle 0.2g of preparation in step (1) is joined 80ml dehydrated alcohol, 20ml deionization
Water, 1ml 28wt% ammonia mixed solution in, be then added dropwise over 24 l tetraethyl orthosilicates, be stirred at room temperature 7 hours, product from
The heart separates, and with absolute ethanol washing, 60 DEG C of vacuum drying, obtains ferroso-ferric oxide/silica dioxide composite particles；
(3) 3-(isobutene. acyl-oxygen) ferroso-ferric oxide/silica dioxide composite particles of modifying of propyl trimethoxy silicane
Preparation
Ferroso-ferric oxide/silica dioxide composite particles the 50mg of preparation in step (2) is added to 0.4ml 3-(isobutene.
Acyl-oxygen) propyl trimethoxy silicane, 40ml dehydrated alcohol mixed solution in, under room temperature stir 48 hours, reaction terminate after, produce
Thing centrifugation, with absolute ethanol washing, 60 DEG C of vacuum drying obtain 3-(isobutene. acyl-oxygen) propyl trimethoxy silicane modification
Ferroso-ferric oxide/silica dioxide composite particles；
(4) preparation of ferroso-ferric oxide/polystyrene colloid particle
The compound particle 50mg of preparation in step (3) is distributed to 30g deionized water, 6mg sodium lauryl sulphate mixed
Close in solution, be passed through nitrogen 30 minutes, add 2ml styrene, the mixed liquor of 80 l divinylbenzene, then lead to nitrogen 30 minutes,
Add the potassium persulfate solution of 1.5ml, 0.02g/ml at 70 DEG C, react 10 hours, product centrifugation, wash with dehydrated alcohol
Washing, 50 DEG C of vacuum drying obtain ferroso-ferric oxide/polystyrene colloid particle；
(5) preparation of ferroso-ferric oxide/polystyrene/silver nano-complex particle
Ferroso-ferric oxide step (4) prepared/polystyrene colloid particle 45mg is distributed to the phosphoric acid that pH value is 8 and delays
In dissolved liquid, adding 9mg polymine, stir 1.5 hours under room temperature, product dehydrated alcohol washs, after washing
Particle be re-dispersed in deionized water, add 8mg silver nitrate, after 20 minutes, product centrifugation, wash with dehydrated alcohol
Wash, in the particle redispersion obtained to deionized water, heat 1.5 hours at 90 DEG C, product centrifugation, wash with dehydrated alcohol
Wash, obtain ferroso-ferric oxide/polystyrene/silver nano-complex particle.
Claims (6)
1. the preparation method of ferroso-ferric oxide/polystyrene/silver nano-complex particle, it is characterised in that step is as follows:
(1), the preparation of ferriferrous oxide nano-particle
Iron chloride, sodium acetate are added according to mass ratio 1:3.5 in the mixed solvent of ethylene glycol and ethylenediamine, stir under room temperature
0.5～1 hour, during then reactor transferred to by mixed liquor, 180～200 DEG C were reacted 12～24 hours, product centrifugation, successively
With dehydrated alcohol and deionized water wash, 50～80 DEG C of vacuum drying, obtain ferriferrous oxide nano-particle；
(2), the preparation of ferroso-ferric oxide/silica dioxide composite particles
The ferriferrous oxide nano-particle of preparation in step (1) is joined dehydrated alcohol, deionized water, 28wt% ammonia mixed
Close in solution, be then added dropwise over tetraethyl orthosilicate, stir 5～7 hours, product centrifugation, with absolute ethanol washing, 40～
60 DEG C of vacuum drying obtain ferroso-ferric oxide/silica dioxide composite particles；
(3), 3-(isobutene. acyl-oxygen) preparation of ferroso-ferric oxide/silica dioxide composite particles modified of propyl trimethoxy silicane
Ferroso-ferric oxide/the silica dioxide composite particles of preparation in step (2) is joined 3-(isobutene. acyl-oxygen) propyl group front three
In the mixed solution of TMOS and dehydrated alcohol, stir 24～48 hours under room temperature, after reaction terminates, product centrifugation,
With absolute ethanol washing, 40～60 DEG C of vacuum drying obtain 3-(isobutene. acyl-oxygen) propyl trimethoxy silicane modify four oxidations
Three-iron/silica dioxide composite particles；
(4), the preparation of ferroso-ferric oxide/polystyrene colloid particle
By the 3-(isobutene. acyl-oxygen of preparation in step (3)) ferroso-ferric oxide/silicon dioxide of modifying of propyl trimethoxy silicane
Compound particle is distributed in the mixed solution of deionized water and sodium lauryl sulphate, is passed through nitrogen 0.5～1.5 hours, adds
Styrene and the mixed solution of divinylbenzene, then lead to nitrogen 10～40 minutes, at 60～80 DEG C, add potassium persulfate solution,
Reacting 5～10 hours, product centrifugation, with absolute ethanol washing, 50～80 DEG C of vacuum drying obtain ferroso-ferric oxide/polyphenyl
Ethylene colloidal particle；
(5), the preparation of ferroso-ferric oxide/polystyrene/silver nano-complex particle
The ferroso-ferric oxide prepared in step (4)/polystyrene colloid particle is distributed in phosphate buffer, adds poly-
Aziridine, stirs 0.5～1.5 hour under room temperature, product absolute ethanol washing, is re-dispersed into by the particle after washing
In ionized water, adding silver nitrate, after 10～30 minutes, centrifugation, with absolute ethanol washing, the particle redispersion obtained is to going
In ionized water, 80～100 DEG C are heated 0.5～1.5 hour, and product centrifugation, with absolute ethanol washing, obtains four oxidations three
Ferrum/polystyrene/silver nano-complex particle.
2. preparation method as claimed in claim 1, is characterized in that the ethylene glycol described in step (1) and the mixed solvent of ethylenediamine
The volume ratio of middle ethylene glycol and ethylenediamine is 2:1, and wherein ethylene glycol consumption is 3～6 times of iron chloride and sodium acetate gross mass.
3. preparation method as claimed in claim 1, is characterized in that the dehydrated alcohol described in step (2), deionized water, 28wt%
In ammonia water mixture, the volume ratio of three is 1:0.1～0.25:0.01～0.0125, and wherein dehydrated alcohol consumption is four added
300～800 times of Fe 3 O nanoparticle quality, tetraethyl orthosilicate consumption is the ferriferrous oxide nano-particle quality added
0.1～0.3 times.
4. preparation method as claimed in claim 1, is characterized in that the 3-(isobutene. acyl-oxygen described in step (3)) propyl group trimethoxy
In the mixed solution of base silane and dehydrated alcohol, the volume of dehydrated alcohol is 3-(isobutene. acyl-oxygen) propyl trimethoxy silicane
100～150 times, dehydrated alcohol consumption is 600～1600 times of the ferroso-ferric oxide/silica dioxide composite particles quality added.
5. preparation method as claimed in claim 1, is characterized in that the deionized water described in step (4) and sodium lauryl sulphate
In mixed liquor, both mass ratioes are 5000:1, and wherein deionized water consumption is the 3-(isobutene. acyl-oxygen added) propyl group trimethoxy
300～800 times of ferroso-ferric oxide/silica dioxide composite particles quality that base silane is modified, the styrene of addition and divinyl
In base benzene mixed liquor, both volume ratios are 1:0.04, and the most cinnamic consumption is the 3-(isobutene. acyl-oxygen added) propyl group three
20～40 times of ferroso-ferric oxide/silica dioxide composite particles quality that methoxy silane is modified；Described potassium persulfate solution
Concentration be 0.01～0.05g/ml, its consumption be add 3-(isobutene. acyl-oxygen) propyl trimethoxy silicane modify four oxygen
Change three-iron/silica dioxide composite particles quality 0.5～2 times.
6. preparation method as claimed in claim 1, is characterized in that the pH value of the phosphate buffer solution described in step (5) is 8, poly-
The consumption of aziridine is 0.1～0.2 times of the ferroso-ferric oxide/polystyrene colloid mass particle added, the use of silver nitrate
0.1～0.2 times of ferroso-ferric oxide/polystyrene colloid mass particle that amount is addition.
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