CN106277066A - A kind of Fe3o4@SiO2the preparation method of magnetic composite - Google Patents
A kind of Fe3o4@SiO2the preparation method of magnetic composite Download PDFInfo
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- CN106277066A CN106277066A CN201610628526.3A CN201610628526A CN106277066A CN 106277066 A CN106277066 A CN 106277066A CN 201610628526 A CN201610628526 A CN 201610628526A CN 106277066 A CN106277066 A CN 106277066A
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- ethanol solution
- mixed material
- tetraethyl orthosilicate
- dehydrated alcohol
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- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 62
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 27
- 229960000935 dehydrated alcohol Drugs 0.000 claims abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 19
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 19
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 19
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 19
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 14
- NASVITFAUKYCPM-UHFFFAOYSA-N ethanol;tetraethyl silicate Chemical compound CCO.CCO[Si](OCC)(OCC)OCC NASVITFAUKYCPM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 239000001509 sodium citrate Substances 0.000 claims abstract description 10
- 238000005406 washing Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000001291 vacuum drying Methods 0.000 claims abstract description 7
- 238000013019 agitation Methods 0.000 claims abstract description 6
- 238000010304 firing Methods 0.000 claims abstract description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 14
- ZXVOCOLRQJZVBW-UHFFFAOYSA-N azane;ethanol Chemical compound N.CCO ZXVOCOLRQJZVBW-UHFFFAOYSA-N 0.000 claims description 13
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 5
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 5
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 5
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 5
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 5
- 239000002086 nanomaterial Substances 0.000 claims description 5
- 229950000845 politef Drugs 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 241001299723 Limonia <Rutaceae> Species 0.000 claims 1
- 239000002253 acid Substances 0.000 claims 1
- 238000004176 ammonification Methods 0.000 claims 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229960004756 ethanol Drugs 0.000 abstract description 5
- 230000002045 lasting effect Effects 0.000 abstract description 5
- 235000011083 sodium citrates Nutrition 0.000 description 8
- 239000002122 magnetic nanoparticle Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000003018 immunoassay Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 238000007899 nucleic acid hybridization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical class [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/08—Ferroso-ferric oxide (Fe3O4)
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
- B01J23/745—Iron
-
- B01J35/33—
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/42—Magnetic properties
Abstract
A kind of Fe3O4@SiO2The preparation method of magnetic composite, comprises the steps: that (1) is configured to ethanol containing ammonia；(2) tetraethyl orthosilicate ethanol solution it is configured to；(3) by Fe3O4It is mixed to get the first mixed material with sodium citrate, then in the first mixed material, adds dehydrated alcohol and deionized water, ultrasonic disperse, obtain Fe3O4Disperse system；(4) again tetraethyl orthosilicate ethanol solution and ethanol containing ammonia are gradually dropped Fe simultaneously3O4Disperse system, in course of reaction, is made temperature of reaction system maintain 68 DEG C by Microwave-assisted firing, and carries out lasting mechanical agitation, and the response time is 20min；(5) products therefrom is centrifuged separating, and washing, after vacuum drying, obtains Fe3O4@SiO2, it is stored in drying tower.The inventive method cost is relatively low and easily obtains, simple to operate, and to environment, will not meet the requirement of green syt.
Description
Technical field
The present invention relates to the preparation field of magnetic composite, specifically a kind of Fe3O4@SiO2The system of magnetic composite
Preparation Method.
Background technology
In recent years, Fe3O4Magnetic nano-particle is owing to being provided simultaneously with the double dominant of magnetic-particle and nano-particle,
It is widely used in the biomedical sectors such as target medicine carrier, cell separation, nuclear magnetic resonance, NMR, immunoassay, nucleic acid hybridization.With
Time, this superparamagnetic material also has good application prospect at catalytic field, can be as liquid phase small size catalyst
Catalytic carrier, improves catalyst and separates difficult situation.But Fe3O4Magnetic nano-particle is oxidizable, and specific surface area is higher, has
Strong gathering tendency, it is difficult to directly apply.Use unformed SiO2To Fe3O4Magnetic nano-particle carries out Surface coating, SiO2
Clad adds its chemical stability, meanwhile, SiO2Avirulence and the existence of surface hydroxyl improve its biocompatibility,
Widen Fe3O4Magnetic nano-particle is in the application in the fields such as biology, catalysis.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is provided that a kind of Fe3O4@SiO2The preparation method of magnetic composite.
To achieve these goals, present invention employs techniques below scheme:
A kind of Fe3O4@SiO2The preparation method of magnetic composite, comprises the steps:
(1) according to volume parts meter, by ammonia that 1 part of mass fraction is 25% and 1.8～2.2 parts of dehydrated alcohol mixing,
It is configured to ammonia-ethanol solution；
(2) according to volume parts meter, by 1 part of tetraethyl orthosilicate and 8～12 parts of dehydrated alcohol mixing, it is configured to positive silicic acid second
Ester-ethanol solution；
(3) first count by weight, by 0.8～1.2 part of Fe3O4It is mixed to get first with 0.8～1.2 part of sodium citrate to mix
Compound material, adds 240～260mL dehydrated alcohol and the ratio of 240～260mL deionized waters according still further to every gram of first mixed material
In the first mixed material, add dehydrated alcohol and deionized water, ultrasonic disperse 10～12min, obtain Fe3O4Disperse system；
(4) first according to volume parts meter, measure respectively 13～17 parts of ammonia-ethanol solution, 10～12 parts of tetraethyl orthosilicates-
Ethanol solution and 220～280 parts of Fe3O4Disperse system, then by tetraethyl orthosilicate-ethanol solution and ammonia-ethanol solution simultaneously by
Gradually instill Fe3O4Disperse system, in course of reaction, is made temperature of reaction system maintain 68～72 DEG C by Microwave-assisted firing, and carries out
Lasting mechanical agitation, the response time is 20～30min；
(5) products therefrom is centrifuged separating, and washing, after vacuum drying, obtains Fe3O4@SiO2Magnetic composite, protects
It is stored in drying tower.
Described Fe3O4It is prepared by the following method:
(1) count by weight, by 120～150 parts of FeCl3·6H2O, 340～380 parts of CH3COONa and 10～20 parts
Sodium citrate mix homogeneously obtains the second mixed material, adds 8～10 milliliters of ethylene glycol according still further to every gram of second mixed material
Bulking value ratio adds ethylene glycol in the second mixed material, is uniformly mixing to obtain mixed liquor；
(2) being transferred to by mixed liquor in politef hydrothermal reaction kettle, making reactor is 190～210 DEG C in temperature
Muffle furnace heats 8～10h, is then centrifuged for separating, washing, is dried, obtains monodispersed Fe3O4Nano material.
Compared with prior art, the beneficial effect that the present invention possesses:
The Fe that the present invention is prepared3O4@SiO2Magnetic composite is with Fe3O4For magnetic core, coated Si O2Protective layer, has concurrently
SiO2The feature such as good biocompatibility, chemical stability, overcomes Fe3O4Owing to dimensional effect, dipole moment gravitation etc. are made
Determination with the particle caused easily agglomerate poor stability；And the inventive method cost is relatively low and easily obtains, simple to operate, and
And the requirement of green syt to environment, will not be met.
Detailed description of the invention
Below by embodiment, technical scheme is further elaborated.
Embodiment 1
A kind of Fe3O4@SiO2The preparation method of magnetic composite, comprises the steps:
(1) ammonia that 5mL mass fraction is 25% and 10ml dehydrated alcohol are joined it is mixed and made into ammonia-ethanol solution；
(2) 1mL tetraethyl orthosilicate and 10ml dehydrated alcohol are hybridly prepared into tetraethyl orthosilicate-ethanol solution；
(3) 0.2g Fe is weighed3O4Be placed in beaker with 0.2g sodium citrate, add 100mL dehydrated alcohol and 100mL go from
Sub-water, ultrasonic disperse 10min, Microwave-assisted firing makes temperature of reaction system maintain 70 DEG C, by tetraethyl orthosilicate-ethanol solution
Being gradually dropped with ammonia-ethanol solution, course of reaction carries out lasting mechanical agitation simultaneously, and the response time is 30min；
(4) products therefrom carries out heart separation, and by some times of deionized water, washing with alcohol, after vacuum drying 3h, collects
End-product Fe3O4@SiO2Magnetic composite is in drying tower, in order to follow-up preparation uses.
Described Fe3O4It is prepared by the following method:
(1) precise 1.35g FeCl3·6H2O、3.6g CH3COONa and 0.15g sodium citrate, adds 40mL second
Glycol, obtains mixed liquor；
(2) by after mixed liquor high-speed stirred 1h, move to, in the politef hydrothermal reaction kettle that capacity is 50mL, make reaction
Still is 200 DEG C of work 8h in Muffle furnace, are then centrifuged for separating, after ethanol and deionized water repeatedly wash, are placed in 70 DEG C of vacuum
Drying baker is dried, and obtains monodispersed Fe3O4Nano material, is placed in the sample after dried in drying tower, in order to follow-up reality
Test use.
Embodiment 2
A kind of Fe3O4@SiO2The preparation method of magnetic composite, comprises the steps:
(1) according to volume parts meter, by ammonia that 1 part of mass fraction is 25% and 1.8 parts of dehydrated alcohol mixing, it is configured to
Ammonia-ethanol solution；
(2) according to volume parts meter, by 1 part of tetraethyl orthosilicate and the mixing of 8 parts of dehydrated alcohol, be configured to tetraethyl orthosilicate-
Ethanol solution；
(3) first count by weight, by 0.8 part of Fe3O4It is mixed to get the first mixed material with 0.8 part of sodium citrate, then presses
The ratio adding 240mL dehydrated alcohol and 240mL deionized water according to every gram of first mixed material adds in the first mixed material
Dehydrated alcohol and deionized water, ultrasonic disperse 10min, obtain Fe3O4Disperse system；
(4) first according to volume parts meter, 13 parts of ammonia-ethanol solution, 10 parts of tetraethyl orthosilicate-ethanol solution are measured respectively
And 220 parts of Fe3O4Disperse system, then tetraethyl orthosilicate-ethanol solution and ammonia-ethanol solution are gradually dropped Fe simultaneously3O4Point
Dissipate system, in course of reaction, Microwave-assisted firing make temperature of reaction system maintain 68 DEG C, and carry out lasting mechanical agitation,
Response time is 20min；
(5) products therefrom is centrifuged separating, and washing, after vacuum drying, obtains Fe3O4@SiO2, it is stored in drying tower.
Described Fe3O4It is prepared by the following method:
(1) count by weight, by 120 parts of FeCl3·6H2O, 340 parts of CH3COONa and 10 parts of sodium citrate mixing are all
Even obtain the second mixed material, according still further to every gram of second mixed material add the bulking value ratio of 8～10 milliliters of ethylene glycol to
Second mixed material adds ethylene glycol, is uniformly mixing to obtain mixed liquor；
(2) mixed liquor is transferred in politef hydrothermal reaction kettle, makes reactor at the Muffle furnace that temperature is 190 DEG C
Middle heating 8h, is then centrifuged for separating, washing, is dried, obtains monodispersed Fe3O4Nano material.
Embodiment 3
A kind of Fe3O4@SiO2The preparation method of magnetic composite, comprises the steps:
(1) according to volume parts meter, by ammonia that 1 part of mass fraction is 25% and 2.2 parts of dehydrated alcohol mixing, it is configured to
Ammonia-ethanol solution；
(2) according to volume parts meter, by 1 part of tetraethyl orthosilicate and the mixing of 12 parts of dehydrated alcohol, be configured to tetraethyl orthosilicate-
Ethanol solution；
(3) first count by weight, by 1.2 parts of Fe3O4It is mixed to get the first mixed material with 1.2 parts of sodium citrates, then presses
The ratio adding 260mL dehydrated alcohol and 260mL deionized water according to every gram of first mixed material adds in the first mixed material
Dehydrated alcohol and deionized water, ultrasonic disperse 12min, obtain Fe3O4Disperse system；
(4) first according to volume parts meter, 17 parts of ammonia-ethanol solution, 12 parts of tetraethyl orthosilicate-ethanol solution are measured respectively
And 280 parts of Fe3O4Disperse system, then tetraethyl orthosilicate-ethanol solution and ammonia-ethanol solution are gradually dropped Fe simultaneously3O4Point
Dissipate system, in course of reaction, Microwave-assisted firing make temperature of reaction system maintain 72 DEG C, and carry out lasting mechanical agitation,
Response time is 30min；
(5) products therefrom is centrifuged separating, and washing, after vacuum drying, obtains Fe3O4@SiO2, it is stored in drying tower.
Described Fe3O4It is prepared by the following method:
(1) count by weight, by 150 parts of FeCl3·6H2O, 380 parts of CH3COONa and 20 parts of sodium citrate mixing are all
Even obtain the second mixed material, add the bulking value ratio of 10 milliliters of ethylene glycol to second according still further to every gram of second mixed material
Mixed material adds ethylene glycol, is uniformly mixing to obtain mixed liquor；
(2) mixed liquor is transferred in politef hydrothermal reaction kettle, makes reactor at the Muffle furnace that temperature is 210 DEG C
Middle heating 10h, is then centrifuged for separating, washing, is dried, obtains monodispersed Fe3O4Nano material.
Claims (2)
1. a Fe3O4@SiO2The preparation method of magnetic composite, it is characterised in that comprise the steps:
(1) according to volume parts meter, by ammonia that 1 part of mass fraction is 25% and 1.8～2.2 parts of dehydrated alcohol mixing, preparation
Ammonification water-ethanol solution；
(2) according to volume parts meter, by 1 part of tetraethyl orthosilicate and the mixing of 8～12 parts of dehydrated alcohol, be configured to tetraethyl orthosilicate-
Ethanol solution；
(3) first count by weight, by 0.8～1.2 part of Fe3O4It is mixed to get the first mixture with 0.8～1.2 part of sodium citrate
Material, adds the ratio of 240～260mL dehydrated alcohol and 240～260mL deionized waters to the according still further to every gram of first mixed material
One mixed material adds dehydrated alcohol and deionized water, ultrasonic disperse 10～12min, obtains Fe3O4Disperse system；
(4) first according to volume parts meter, 13～17 parts of ammonia-ethanol solution, 10～12 parts of tetraethyl orthosilicate-ethanol are measured respectively
Solution and 220～280 parts of Fe3O4Disperse system, then tetraethyl orthosilicate-ethanol solution and ammonia-ethanol solution are gradually dripped simultaneously
Enter Fe3O4Disperse system, in course of reaction, is made temperature of reaction system maintain 68～72 DEG C by Microwave-assisted firing, and carries out continuing
Mechanical agitation, the response time is 20～30min；
(5) products therefrom is centrifuged separating, and washing, after vacuum drying, obtains Fe3O4@SiO2Magnetic composite, is stored in
In drying tower.
2. preparation method as claimed in claim 1, it is characterised in that described Fe3O4It is prepared by the following method:
(1) count by weight, by 120～150 parts of FeCl3·6H2O, 340～380 parts of CH3COONa and 10～20 portions of Fructus Citri Limoniaes
Acid sodium mix homogeneously obtains the second mixed material, adds the weight of 8～10 milliliters of ethylene glycol according still further to every gram of second mixed material
Volume ratio adds ethylene glycol in the second mixed material, is uniformly mixing to obtain mixed liquor；
(2) mixed liquor is transferred in politef hydrothermal reaction kettle, makes reactor in the Muffle that temperature is 190～210 DEG C
Stove heats 8～10h, is then centrifuged for separating, washing, is dried, obtains monodispersed Fe3O4Nano material.
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| CN201610628526.3A CN106277066A (en) | 2016-08-03 | 2016-08-03 | A kind of Fe3o4@SiO2the preparation method of magnetic composite |
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| CN201610628526.3A CN106277066A (en) | 2016-08-03 | 2016-08-03 | A kind of Fe3o4@SiO2the preparation method of magnetic composite |
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Family
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108187741A (en) * | 2018-01-09 | 2018-06-22 | 天津大学 | More carboxyl magnetic Nano silicon ball solid-borne platinum catalysts and its preparation method and application |
| CN110439517A (en) * | 2019-07-12 | 2019-11-12 | 浙江海洋大学 | A kind of flooding method suitable for heavy crude reservoir |
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| CN101640089A (en) * | 2009-07-08 | 2010-02-03 | 复旦大学 | Super paramagnetism inorganic nanometer microballoon and preparation method thereof |
| CN105621498A (en) * | 2016-03-14 | 2016-06-01 | 宁波江东索雷斯电子科技有限公司 | Preparation method of monodisperse silicon dioxide/ferroferric oxide magnetic composite particles |
| CN105712409A (en) * | 2014-12-03 | 2016-06-29 | 中国科学院宁波材料技术与工程研究所 | Preparation method of spherical ferriferrous oxide |
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2016
- 2016-08-03 CN CN201610628526.3A patent/CN106277066A/en active Pending
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| CN101640089A (en) * | 2009-07-08 | 2010-02-03 | 复旦大学 | Super paramagnetism inorganic nanometer microballoon and preparation method thereof |
| CN105712409A (en) * | 2014-12-03 | 2016-06-29 | 中国科学院宁波材料技术与工程研究所 | Preparation method of spherical ferriferrous oxide |
| CN105621498A (en) * | 2016-03-14 | 2016-06-01 | 宁波江东索雷斯电子科技有限公司 | Preparation method of monodisperse silicon dioxide/ferroferric oxide magnetic composite particles |
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| Title |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108187741A (en) * | 2018-01-09 | 2018-06-22 | 天津大学 | More carboxyl magnetic Nano silicon ball solid-borne platinum catalysts and its preparation method and application |
| CN110439517A (en) * | 2019-07-12 | 2019-11-12 | 浙江海洋大学 | A kind of flooding method suitable for heavy crude reservoir |
| CN110439517B (en) * | 2019-07-12 | 2021-09-17 | 浙江海洋大学 | Oil displacement method suitable for heavy oil reservoir |
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