CN105948137A - Preparation method of porous Fe3O4 multistage micron structure - Google Patents
Preparation method of porous Fe3O4 multistage micron structure Download PDFInfo
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- CN105948137A CN105948137A CN201610578710.1A CN201610578710A CN105948137A CN 105948137 A CN105948137 A CN 105948137A CN 201610578710 A CN201610578710 A CN 201610578710A CN 105948137 A CN105948137 A CN 105948137A
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- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 28
- 229920000642 polymer Polymers 0.000 claims abstract description 19
- PVFSDGKDKFSOTB-UHFFFAOYSA-K iron(3+);triacetate Chemical compound [Fe+3].CC([O-])=O.CC([O-])=O.CC([O-])=O PVFSDGKDKFSOTB-UHFFFAOYSA-K 0.000 claims abstract description 18
- 239000002243 precursor Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims abstract description 8
- 239000002127 nanobelt Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 238000001354 calcination Methods 0.000 claims description 10
- -1 iron ion Chemical class 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 6
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 5
- 150000002505 iron Chemical class 0.000 claims description 4
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 claims description 3
- 239000005695 Ammonium acetate Substances 0.000 claims description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 3
- 235000019257 ammonium acetate Nutrition 0.000 claims description 3
- 229940043376 ammonium acetate Drugs 0.000 claims description 3
- 239000012298 atmosphere Substances 0.000 claims description 3
- 229960002413 ferric citrate Drugs 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- NPFOYSMITVOQOS-UHFFFAOYSA-K iron(III) citrate Chemical compound [Fe+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NPFOYSMITVOQOS-UHFFFAOYSA-K 0.000 claims description 3
- 235000011056 potassium acetate Nutrition 0.000 claims description 3
- 239000001632 sodium acetate Substances 0.000 claims description 3
- 235000017281 sodium acetate Nutrition 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 8
- 150000002500 ions Chemical class 0.000 abstract description 4
- 150000003839 salts Chemical class 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000011031 large-scale manufacturing process Methods 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 238000002336 sorption--desorption measurement Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000005518 electrochemistry Effects 0.000 description 2
- 238000000593 microemulsion method Methods 0.000 description 2
- 239000002057 nanoflower Substances 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 150000005837 radical ions Chemical class 0.000 description 2
- 102000004310 Ion Channels Human genes 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000011553 magnetic fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004530 micro-emulsion Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000002070 nanowire Substances 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 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]
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/50—Agglomerated particles
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- 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
- C01P2006/12—Surface area
-
- 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
- C01P2006/16—Pore diameter
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Iron (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention provides a preparation method of a porous Fe3O4 multistage micron structure. The preparation method of the porous Fe3O4 multistage micron structure is characterized by adopting a ferric acetate polymer as a precursor and including the following steps that 1, ferric salt and acetate are respectively and completely dissolved in a certain temperature of hot water; 2, the two solutions are rapidly mixed, stirred and cooled, a precipitate produced after a certain time is filtered out, and drying is performed to obtain ferric acetate polymer powder; 3, the obtained ferric acetate polymer powder is calcined to obtain the porous Fe3O4 multistage micron structure. The preparation method of the porous Fe3O4 multistage micron structure is low in cost and simple in process, the product is stable in quality and good in repeatability, and large-scale preparation is easy to achieve. The product is the multistage micron structure by assembling nano belts composed of Fe3O4 nano-crystallines, the specific surface area is large, an ion diffusion path is shortened, and the porous Fe3O4 multistage micron structure has excellent electrochemical performance and is suitable for large-scale production.
Description
Technical field
The invention belongs to a kind of porous Fe3O4The preparation method of multistage micrometer structure, sinks more particularly to one
Shallow lake method prepares metal organic salt polymer precursor and by calcining preparation porous Fe3O4Multistage micrometer structure
Method.The invention further relates to porous Fe prepared by method described above3O4Multistage micrometer structure.
Background technology
Fe3O4There is the size electricity relevant with pattern and magnetic performance, make it in magnetic ink, electronics and life
Thing sensitive material, magnetic fluid and magnetic recording material, high-density magnetic recording media, biological medicine and electrochemistry
The fields such as energy storage have a wide range of applications.At present it has been reported that use various physics, chemical method to be prepared for
The Fe of monodispersity3O4Nano-particle, octahedron, nanometer rods, nano wire, nano chain, nanotube, nanometer
Cone array, tiny balloon, the three-dimensional nanostructured such as superlattices and nano flower.Due to Fe3O4Inverse spinel knot
Structure and intrinsic magnetic, the preparation of two-dimensional structure nanometer sheet is considered as extremely difficult.Synthesize group at present
The Fe got together3O4The nano flower that nanometer sheet or nanometer sheet assemble, but reaction requires harsher, and technique is more multiple
Miscellaneous.
Fe3O4The preparation method of material, predominantly organic tool ball-milling method, hydro-thermal method, microemulsion method, Hydrolyze method etc..
Mechanical Attrition Method in Nanostructural Materials favorable reproducibility, simple to operate, but the period of production is long, and particle diameter refinement is also difficult
Reach requirement.Due to strong plastic deformation, Fe can be caused3O4Grain has bigger distortion of lattice.Water
Full-boiled process has two advantages: one is the raising that relatively high temperature (130～250 degree) is conducive to magnetic property；Two are
Carry out closing in container, produce relatively high pressure (0.3～4MPa), it is to avoid component volatilization, be conducive to improving
Product purity and protection environment, but owing to reaction is to carry out in high temperature environments, so to the requirement of equipment relatively
High.Microemulsion method can be prevented effectively between granule reunites, thus the particle diameter of nanometer powder narrowly distributing obtained,
Form rule, dispersive property is good, and great majority are spherical.By control water in microemulsion droplets volume and
The concentration of various reactants can control Fe3O4Nucleation, growth course, to obtain the single dispersing of various particle diameter
Nanoparticle, but Fe prepared by this method3O4Nanoparticle crystalline structure is imperfect, and particle surface is the most dirty
Dye.Hydrolyze method is low for equipment requirements, and reaction can be carried out under the conditions of relatively mild, and technological process is simple,
Product purity is high, and ion dispersibility is preferable, but the method requires to consider to affect powder in preparation process
The many factors (such as reactant concentration, reaction temperature, addition speed and stirring state etc.) of particle diameter and performance.
To this end, the simple sedimentation method can be used to prepare ferric acetate polymer precursor, and prepared by thermal decomposition method
By Fe3O4The nano belt of nanocrystalline composition is assembled into multistage micrometer structure then.Porous Fe prepared by the method3O4
Multistage micrometer structure pattern is homogeneous, has good dispersibility, and can be by regulation reactant concentration to forerunner
The size of body is controlled.
There is the material of loose structure, because it has high specific surface area and adjustable aperture structure, become
The study hotspot of current every field, realizes the controlled preparation to ferric acetate polymer precursor by the sedimentation method,
And regulate calcining mechanism, it is thus achieved that adjustable multistage micrometer structure material with porous.There is meso-hole structure
Porous Fe3O4Multistage micrometer structure material is easily isolated owing to having, and higher specific surface area is adjustable
, there is potential application in multiple fields in the advantages such as aperture size and shortening ion channel.
Summary of the invention
It is an object of the invention to provide that a kind of preparation technology is simple and the lower-cost sedimentation method prepare ferric acetate
Polymer precursor also obtains porous Fe by calcining3O4The preparation method of multistage micrometer structure.This preparation method
Easy and simple to handle, product is uniform, and good stability is with low cost, environmental protection and be prone to large-scale commercial and produce.
In electrochemistry, it is catalyzed multiple field all there is potential using value.
For achieving the above object, the present invention is achieved by the following technical solutions:
The invention discloses a kind of porous Fe of preparation3O4The method of multistage micrometer structure, walks including following order
Rapid:
(1) weigh appropriate iron salt and acetate is dissolved separately in a certain amount of hot deionized water；
(2) two parts of solution are mixed rapidly, and after stirring at a certain temperature, then mixed liquor is cooled to one
Fixed temperature, the precipitation of generation is dried after filtering, it is thus achieved that ferric acetate polymer precursor；
(3) the ferric acetate polymer precursor powder obtained is calcined, obtain that there is porous Fe3O4Many
Level micrometer structure.
Described iron salt is one or more in ferric chloride, ferric nitrate, ferric citrate.
Described acetate is one or more in sodium acetate, ammonium acetate, potassium acetate.
Described iron ion: the mol ratio of acetate ion is 1:1 1:6, wherein iron ion in water mole
Concentration is 0.5 8.0mol/L.
The temperature of described hot water is 70 95 DEG C.
Described temperature reduces to 40 60 DEG C.
Described inertia calcination atmosphere is nitrogen, argon.
Described calcining heat is 400 800 DEG C.
The present invention uses step sedimentation method to prepare presoma, and the preparation technology related to is simple, constant product quality
And reproducible, technical process is environment friendly and pollution-free, by the calcining of presoma i.e. be can get homogeneous porous
Multistage micrometer structure, has bigger specific surface area and good electric conductivity, in the application in multiple fields
There is good prospect.
Accompanying drawing explanation
Fig. 1 is target product Fe3O4Material X-ray diffractogram.
Fig. 2 is the stereoscan photograph of ferric acetate polymer precursor.
Fig. 3 is the Fe of the multistage micrometer structure of end product porous3O4Stereoscan photograph.
Fig. 4 is product Fe3O4Nitrogen adsorption desorption curve and graph of pore diameter distribution.
Detailed description of the invention
Embodiment 1
One prepares porous Fe3O4The method of multistage micrometer structure, including following order step:
(1) by ferric chloride, sodium acetate the hot water being completely dissolved in 80 DEG C respectively in, iron ion: acetic acid
The mol ratio of radical ion is 1:3, and wherein iron ion molar concentration in aqueous is 1.0mol/L.
(2) by above-mentioned two parts of rapid mix and blends of solution, mixed liquor is cooled to 50 DEG C, will be raw after 5min
The precipitation become filters out, be placed in baking oven and be dried to obtain ferric acetate polymer precursor powder.
(3) the ferric acetate polymer precursor powder obtained is placed in nitrogen atmosphere at 400 DEG C calcining
2h, the pressed powder obtained by centrifugation, wash, be dried, obtain porous Fe3O4Multistage micrometer structure.
Embodiment 2
One prepares porous Fe3O4The method of multistage micrometer structure, including following order step:
(1) by ferric nitrate, ammonium acetate the hot water being completely dissolved in 95 DEG C respectively in, iron ion: acetate
The mol ratio of ion is 1:6, and wherein iron ion molar concentration in aqueous is 0.5mol/L.
(2) by above-mentioned two parts of rapid mix and blends of solution, mixed liquor is cooled to 40 DEG C, will be raw after 15min
The precipitation become filters out, be placed in baking oven and be dried to obtain ferric acetate polymer precursor powder.
(3) the ferric acetate polymer precursor powder obtained is placed in argon gas atmosphere at 500 DEG C calcining
5h, the pressed powder obtained by centrifugation, wash, be dried, obtain that there is porous Fe3O4Multistage micrometer structure.
Embodiment 3
One prepares porous Fe3O4The method of multistage micrometer structure, including following order step.
(1) by ferric citrate, potassium acetate the hot water being completely dissolved in 70 DEG C respectively in, iron ion: acetic acid
The mol ratio of radical ion is 1:1, and wherein iron ion molar concentration in aqueous is 8mol/L.
(2) by above-mentioned two parts of rapid mix and blends of solution, mixed liquor is cooled to 60 DEG C, will be raw after 2min
The precipitation become filters out, be placed in baking oven and be dried to obtain ferric acetate polymer precursor powder.
(3) the ferric acetate polymer precursor powder obtained is placed in nitrogen atmosphere and at 700 DEG C, calcines 4h,
The pressed powder obtained by centrifugation, wash, be dried, obtain that there is porous Fe3O4Multistage micrometer structure.
The method used according to above-mentioned detailed description of the invention can prepare porous Fe3O4Multistage micrometer structure, by scheming
X-ray diffractogram in 1 can confirm；
Ferric acetate polymer precursor powder that the method used by above-mentioned detailed description of the invention is obtained and final
Product porous Fe3O4The SEM photograph of multistage micrometer structure, from Fig. 2 and 3, after calcining, still protects
Hold by Fe3O4Nanocrystalline composition nano belt and then the multistage micrometer structure being assembled into, and material is provided with porous
Structure, this specific surface area being conducive to improving material, also shortens the evolving path of ion so that material simultaneously
Potential development and application values is had in multiple fields.
Fig. 4 is porous Fe3O4The nitrogen adsorption desorption curve of multistage micrometer structure and graph of pore diameter distribution, from figure
In can be seen that and belong to IV class adsorption/desorption, the specific surface area of material is 42m2/ g, can by graph of pore diameter distribution
To show that pore size concentrates on about 15nm, belong to meso-hole structure.
Claims (7)
1. a porous Fe3O4The preparation method of multistage micrometer structure, it is characterised in that it comprises the following steps:
(1) weigh appropriate iron salt and acetate is dissolved separately in a certain amount of hot deionized water；
(2) two parts of solution are mixed rapidly, and after stirring at a certain temperature, then mixed liquor is cooled to one
Fixed temperature, the precipitation of generation is dried after filtering, it is thus achieved that ferric acetate polymer precursor；
(3) the ferric acetate polymer precursor powder obtained is calcined, obtain that there is porous Fe3O4Many
Level micrometer structure.
Porous Fe the most according to claim 13O4The preparation method of multistage micrometer structure, its feature exists
In: in described step (1), iron salt is in ferric chloride, ferric nitrate, ferric citrate, ferric acetyl acetonade
Plant or several；Acetate is one or more in sodium acetate, Quilonorm (SKB), ammonium acetate, potassium acetate.Ferrum from
Son: the mol ratio of acetate ion is 1:1 1:6, and wherein iron ion molar concentration in water is 0.5 8.0
mol/L。
Porous Fe the most according to claim 13O4The preparation method of multistage micrometer structure, its feature exists
In: in described step (1), the temperature of hot water is 70 95 DEG C.
Porous Fe the most according to claim 13O4The preparation method of multistage micrometer structure, its feature exists
In: in described step (2), mixeding liquid temperature is cooled to 40 60 DEG C.
Porous Fe the most according to claim 13O4The preparation method of multistage micrometer structure, its feature exists
In: described step (3) presoma uses the method calcined in an inert atmosphere, and calcining heat is 400 800 DEG C.
6. according to the preparation method described in any one of claim 15 prepare be porous Fe3O4Multistage micron
Structure.
7. require described porous Fe according to right 63O4Multilevel hierarchy, it is characterised in that: described porous Fe3O4
Multistage micrometer structure is by Fe3O4Nanocrystalline composition nano belt and then the multistage micrometer structure being assembled into.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2016102071617 | 2016-04-05 | ||
| CN201610207161 | 2016-04-05 |
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| CN105948137A true CN105948137A (en) | 2016-09-21 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767836A (en) * | 2008-12-31 | 2010-07-07 | 陕西北美基因股份有限公司 | Method for preparing ferroferric oxide magnetic nanospheres |
| CN102092795A (en) * | 2010-12-11 | 2011-06-15 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of ferroferric oxide multi-stage ball modified by organic polymer |
| CN102153150A (en) * | 2011-04-29 | 2011-08-17 | 中国科学院合肥物质科学研究院 | Micro/nano structural ferroferric oxide hollow spheres and preparation method thereof |
-
2016
- 2016-07-21 CN CN201610578710.1A patent/CN105948137A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767836A (en) * | 2008-12-31 | 2010-07-07 | 陕西北美基因股份有限公司 | Method for preparing ferroferric oxide magnetic nanospheres |
| CN102092795A (en) * | 2010-12-11 | 2011-06-15 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of ferroferric oxide multi-stage ball modified by organic polymer |
| CN102153150A (en) * | 2011-04-29 | 2011-08-17 | 中国科学院合肥物质科学研究院 | Micro/nano structural ferroferric oxide hollow spheres and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| CHAOMEI SHANG等: "One-pot in situ molten salt synthesis of octahedral Fe3O4 for efficient microwave absorption application", 《RSC ADVANCES》 * |
| 刘正超编: "《染化药剂 下册》", 30 June 1974, 香港金文书店出版 * |
| 崔云等: "食醋返浑的原因分析及其防治方法", 《食品科技》 * |
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