CN106495233B - Hedgehog shape needle-like ferroso-ferric oxide and preparation method thereof - Google Patents

Hedgehog shape needle-like ferroso-ferric oxide and preparation method thereof Download PDF

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CN106495233B
CN106495233B CN201611267441.3A CN201611267441A CN106495233B CN 106495233 B CN106495233 B CN 106495233B CN 201611267441 A CN201611267441 A CN 201611267441A CN 106495233 B CN106495233 B CN 106495233B
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preparation
ferroso
ferric oxide
needle
suspension
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CN106495233A (en
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刘岗
刘杰
袁春燕
李金玲
郑康
陈林
王化
田兴友
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Hefei Institutes of Physical Science of CAS
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Hefei Institutes of Physical Science of CAS
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    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00Compounds of iron
    • C01G49/02Oxides; Hydroxides
    • C01G49/08Ferroso-ferric oxide [Fe3O4]
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00Crystal-structural characteristics
    • C01P2002/70Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72Crystal-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
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/01Particle morphology depicted by an image
    • C01P2004/03Particle morphology depicted by an image obtained by SEM
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/30Particle morphology extending in three dimensions
    • C01P2004/45Aggregated particles or particles with an intergrown morphology
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/12Surface area
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/42Magnetic properties

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  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Iron (AREA)
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Abstract

The invention discloses a kind of hedgehog shape needle-like ferroso-ferric oxide and preparation method thereof, the preparation method comprises the following steps:Step 1: under stirring, anhydrous ferric chloride, sodium thiosulfate and urea are mixed with solvent, mixed solution is made;Stirred Step 2: being added into mixed solution after ZnO, suspension is made;Step 3: in a high voltage state, suspension is heated into 150 DEG C~180 DEG C, 8~12 hours are incubated;Clean, dry Step 4: being cooled to after room temperature, so that the Fe 3 O 4 magnetic powder of needle-like is made.Ferroso-ferric oxide specific surface area produced by the present invention is high, without adding the materials such as template, convenient post-treatment, and reaction temperature is low, the reaction time is short, reaction process is simple, inexpensive, and environmental protection.

Description

Hedgehog shape needle-like ferroso-ferric oxide and preparation method thereof
Technical field
The present invention relates to field of material technology, and in particular to a kind of hedgehog type needle-like ferroso-ferric oxide and preparation method thereof.
Background technology
Ferroso-ferric oxide, molecular formula is Fe3O4, with a cube inverse spinel structure, due to its unique physical chemistry Matter, the purposes different from conventional material, such as pollution administration, magnetic recording material, magnetic fluid, medicine, face are shown at numerous aspects The fields such as material are widely used.In terms of pollution administration, due to outstanding catalytic decomposition performance and absorption property, good Magnetic is easy to reclaim, and ferroso-ferric oxide has become the study hotspot in terms of environment in recent years improvement, by by extensive with making a return journey Except water pollution.
In recent years, there is the preparation method of the ferroso-ferric oxide of the different method synthesis different structure of document report, for example Using solvent method iron chloride as source of iron, lauryl mercaptan does precipitating reagent and is prepared for monodispersity as emulsifying agent, sodium acetate Fe with hierarchy3O4Microballoon, and for example someone ferric acetyl acetonade is dissolved in containing 1,2- hexadecane diols, phenylate, oleic acid With the in the mixed solvent of oleyl amine, the monodispersity Fe that particle diameter is less than 20nm has been made in backflow at 150 DEG C3O4Particle.
Although possessing certain Fe in the prior art3O4Preparation method, but the Fe prepared3O4Particle morphology is not outstanding enough, Performance is not good enough, and specific surface area is not big enough, and regulates and controls Fe to how changing synthesis condition3O4Pattern and synthesis hedgehog shape The Fe of needle-like3O4Report is seldom.
The content of the invention
(1) technical problem solved
In view of the shortcomings of the prior art, the invention provides a kind of hedgehog shape needle-like ferroso-ferric oxide and preparation method thereof, To overcome Fe prepared by prior art3O4The low technical problem of specific surface area.
(2) technical scheme
To realize object above, the present invention is achieved by the following technical programs:
On the one hand, The present invention gives a kind of preparation method of hedgehog shape needle-like ferroso-ferric oxide, the preparation method bag Include following steps:
Step 1: under stirring, anhydrous ferric chloride, sodium thiosulfate and urea are mixed with solvent, it is made Mixed solution;
Stirred Step 2: being added into mixed solution after ZnO, suspension is made;
Step 3: in a high voltage state, suspension is heated into 150 DEG C~180 DEG C, 8~12 hours are incubated;
Clean, dry Step 4: being cooled to after room temperature, so that the Fe 3 O 4 magnetic powder of needle-like is made.
Further, in the mixed solution anhydrous ferric chloride, sodium thiosulfate, the mol ratio difference of urea and solvent For 1:1~2:2~4:10~14.
Further, in step 2 ZnO and the mol ratio of anhydrous ferric chloride is 0.1~0.2:1;The time of stirring is 10 ~15min.
Further, the pressure of the high pressure in step 3 is 12MPa~15MPa.
Further, the temperature of the drying in step 4 is 50~70 DEG C, and the time is 3~5 hours.
Further, the wash number in step 4 is 3~5 times.
Further, the solvent is one or both of deionized water or ethanol solution.
On the other hand, The present invention gives a kind of ferroso-ferric oxide prepared using preparation method described above.
Further, the specific surface area of the ferroso-ferric oxide is 45~70m2/g;The length ruler of the ferroso-ferric oxide It is very little to be distributed in 0.1~2 micron.
The length dimension distribution of the ferroso-ferric oxide of the present invention is preferably 0.15~1.5 micron, and further Size Distribution is excellent Elect 0.2~1.2 micron as.
The formation mechanism of the present invention is as follows:
1st, partial oxidation iron is reduced into frerrous chloride by sodium thiosulfate, and its reaction equation is as follows:
2FeCl3+2Na2S2O3=2NaCl+2FeCl2+Na2S4O6
So that iron ion is in coexisting state with ferrous ion in system.
2nd, the mechanism of ZnO regulation and control:
ZnO has both sexes, and Fe (OH) can be participated under this system3Generation:
2FeCl3+3ZnO+3H2O=2Fe (OH)3+3ZnCl2
3rd, 160 DEG C or so are heated in a high voltage state, urea slowly decomposes release ammonia, its reaction equation is as follows:
CO(NH2)2=NH3+HCNO;
The ammonia of generation is soluble in water, produces weakly alkaline environment:
NH3+H2O=NH4 ++OH-
4th, at high temperature under high pressure, ferroso-ferric oxide is generated, its reaction equation is as follows:
Fe2++2Fe3++8OH-=Fe3O4+4H2O;
Or Fe (OH)2+2Fe(OH)3=Fe3O4+4H2O。
(3) beneficial effect
The invention provides a kind of ferroso-ferric oxide of hedgehog shape needle-like high-specific surface area and preparation method thereof.Possess following Beneficial effect:
1st, the present invention is regulated and controled by the use of anhydrous ferric chloride, sodium thiosulfate and urea as raw material by hydro-thermal method and ZnO Needle-like ferroso-ferric oxide is synthesized, during the course of the reaction, it is not necessary to add dispersant and surfactant, and obtained specific surface area is 45~70m2/g ferroso-ferric oxide, improves the specific surface area of ferroso-ferric oxide.
2nd, the present invention need not add the materials such as template, convenient post-treatment, and reaction temperature is low, the reaction time is short, reaction process Simply, inexpensive.
3rd, preparation process environmental protection of the present invention, is not used any poisonous and hazardous organic reagent.
4th, the present invention solves that process in traditional preparation methods is complicated, with high costs, pattern not enough good, specific surface area is low Problem.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is ferroso-ferric oxide Fe3O4 prepared by embodiment 3 SEM photograph;
Fig. 2 is ferroso-ferric oxide Fe3O4 prepared by embodiment 3 XRD spectra.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1:
The embodiment of the present invention 1 proposes a kind of preparation method of hedgehog shape needle-like ferroso-ferric oxide, comprises the following steps:
1st, 1mmol anhydrous ferric chlorides, 1mmol sodium thiosulfate and 2mmol urea are dissolved in 10ml deionized waters, Homogeneous solution is obtained under magnetic stirring.
2 then add 0.1mmolZnO, magnetic agitation 10min, obtain suspension;
3rd, suspension is added in the polytetrafluoroethylene (PTFE) autoclave inner bag that volume is 50ml, in 12MPa pressure Under, 150 DEG C are heated in baking oven, 8 hours are incubated.
4th, autoclave, which is naturally cooled to, takes out reactant after room temperature, product is each using deionized water and ethanol alternating Cleaning 3 times, collects sediment using externally-applied magnetic field, product then is transferred into vacuum drying chamber 3 hours of 50 DEG C of dryings, obtained Specific surface area is 45m2/g black ferroferric oxide Magnaglo.
Embodiment 2:
The embodiment of the present invention 2 proposes a kind of preparation method of hedgehog shape needle-like ferroso-ferric oxide, comprises the following steps:
1st, 1mmol anhydrous ferric chlorides, 2mmol sodium thiosulfate and 4mmol urea are dissolved in 14ml deionized waters, Homogeneous solution is obtained under magnetic stirring,
2 then add 0.2mmolZnO, magnetic agitation 15min, obtain suspension;
3rd, suspension is added in the polytetrafluoroethylene (PTFE) autoclave inner bag that volume is 50ml, in 15MPa pressure Under, 180 DEG C are heated in baking oven, 12 hours are incubated.
4th, autoclave, which is naturally cooled to, takes out reactant after room temperature, product is each using deionized water and ethanol alternating Cleaning 5 times, collects sediment using externally-applied magnetic field, product then is transferred into vacuum drying chamber 5 hours of 70 DEG C of dryings, obtained Specific surface area is 64m2/g black ferroferric oxide Magnaglo.
Embodiment 3:
The embodiment of the present invention 3 proposes a kind of preparation method of hedgehog shape needle-like ferroso-ferric oxide, comprises the following steps:
1st, 1mmol anhydrous ferric chlorides, 1.3mmol sodium thiosulfate and 2.6mmol urea are dissolved in 8ml deionized waters In 4ml absolute ethyl alcohol mixed solutions,
2nd, homogeneous solution is obtained under magnetic stirring, is then added 0.13mmolZnO, magnetic agitation 12min, is suspended Liquid;
3rd, suspension is added in the polytetrafluoroethylene (PTFE) autoclave inner bag that volume is 50ml, in 14MPa pressure Under be heated to 160 DEG C in baking oven, be incubated 10 hours.
4th, autoclave, which is naturally cooled to, takes out reactant after room temperature, product is each using deionized water and ethanol alternating Cleaning 4 times, collects sediment using externally-applied magnetic field, product then is transferred into vacuum drying chamber 4 hours of 60 DEG C of dryings, obtained Specific surface area is 70m2/g black ferroferric oxide Magnaglos.
The hedgehog shape needle-like ferroso-ferric oxide prepared to embodiment 3 carries out SEM observations and XRD analysis.
Reference picture 1, it was found from SEM photograph, the yield of products therefrom is very big, and specific surface area is high, and particle is in needle-like, and whole Body distribution shows hedgehog shape, and aciculiform ferroso-ferric oxide length dimension is distributed in 1.0 microns.
Reference picture 2, it was found from XRD (X-ray diffraction) spectrogram, products therefrom is ferroso-ferric oxide Fe3O4 phase crystal structures (JCPDS card no.01-089-0688)。
In summary, the embodiments of the invention provide a kind of ferroso-ferric oxide of hedgehog shape needle-like high-specific surface area and its system Preparation Method.Possesses following beneficial effect:
1st, the embodiment of the present invention passes through hydro-thermal method and ZnO by the use of anhydrous ferric chloride, sodium thiosulfate and urea as raw material To regulate and control synthesis needle-like ferroso-ferric oxide, during the course of the reaction, it is not necessary to add dispersant and surfactant, and it is made and compares table Area is 45~70m2/g ferroso-ferric oxide, improves the specific surface area of ferroso-ferric oxide.
2nd, the embodiment of the present invention need not add the materials such as template, convenient post-treatment, and reaction temperature is low, the reaction time is short, anti- Answer that technique is simple, inexpensive.
3rd, preparation process of embodiment of the present invention environmental protection, is not used any poisonous and hazardous organic reagent.
4th, the embodiment of the present invention solves that process in traditional preparation methods is complicated, with high costs, pattern is not good enough, compare surface The low problem of product.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.

Claims (8)

1. a kind of preparation method of hedgehog shape needle-like ferroso-ferric oxide, it is characterised in that the preparation method comprises the following steps:
Step 1: under stirring, anhydrous ferric chloride, sodium thiosulfate and urea are mixed with solvent, mixing is made Solution;
Stirred Step 2: being added into mixed solution after ZnO, suspension is made;
Step 3: in a high voltage state, suspension is heated into 150 DEG C~180 DEG C, 8~12 hours are incubated;
Clean, dry Step 4: being cooled to after room temperature, so that the Fe 3 O 4 magnetic powder of needle-like is made.
2. preparation method according to claim 1, it is characterised in that anhydrous ferric chloride in the mixed solution, thio The mol ratio of sodium sulphate, urea and solvent is respectively 1:1~2:2~4:10~14.
3. preparation method according to claim 2, it is characterised in that mole of ZnO and anhydrous ferric chloride in step 2 Than for 0.1~0.2:1;The time of stirring is 10~15min.
4. the preparation method according to claim 1 or 2 or 3, it is characterised in that the pressure of the high pressure in step 3 is 12MPa~15MPa.
5. preparation method according to claim 4, it is characterised in that the temperature of the drying in step 4 is 50~70 DEG C, Time is 3~5 hours.
6. the preparation method according to claim 1 or 2 or 3, it is characterised in that the temperature of the drying in step 4 is 50~ 70 DEG C, the time is 3~5 hours.
7. the preparation method according to claim 1 or 2 or 3, it is characterised in that the wash number in step 4 is 3~5 It is secondary.
8. the preparation method according to claim 1 or 2 or 3, it is characterised in that the solvent is that deionized water or ethanol are molten One or both of liquid.
CN201611267441.3A 2016-12-31 2016-12-31 Hedgehog shape needle-like ferroso-ferric oxide and preparation method thereof Active CN106495233B (en)

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