CN103723774A - Organic hydrosol of ferroferric oxide nanoparticles and preparation method and application thereof - Google Patents
Organic hydrosol of ferroferric oxide nanoparticles and preparation method and application thereof Download PDFInfo
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- CN103723774A CN103723774A CN201210394090.8A CN201210394090A CN103723774A CN 103723774 A CN103723774 A CN 103723774A CN 201210394090 A CN201210394090 A CN 201210394090A CN 103723774 A CN103723774 A CN 103723774A
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Abstract
The invention discloses a preparation method for organic hydrosol of ferroferric oxide nanoparticles. The method comprises the following steps: (1) in the presence of high-boiling-point alcohol, performing thermal decomposition on an iron organic precursor, and performing solid-liquid separation to obtain the ferroferric oxide nanoparticles, wherein the boiling point of the high-boiling-point alcohol is from 200 DEG C to 300 DEG C; (2) mixing an oil-soluble ligand solution with the ferroferric oxide nanoparticles prepared in step (1) to obtain the organic hydrosol of the ferroferric oxide nanoparticles. The method disclosed by the invention can prepare the organic hydrosol of ferroferric oxide nanoparticles with uniform particle size, good stability and good dispersibility, and has relatively wide application prospect in the field of catalytic desulfurization, pollutant adsorption and the like.
Description
Technical field
The present invention relates to organic liquor colloidal sol of a kind of ferroferric oxide nano granules and its preparation method and application.
Background technology
The organic liquor colloidal sol of ferroferric oxide nano granules is a kind of magnetic Nano material that has major application to be worth in fields such as catalytic desulfurization and pollutent absorption.In prior art, coprecipitation method can only be prepared the Z 250 water-sol, and easily reunites, dispersed bad; Hydrothermal method is prepared ferroferric oxide nano granules and is needed the harsh reaction conditionss such as High Temperature High Pressure, and energy consumption is higher and react unstable; The ferroferric oxide nano granules that high temperature thermal decomposition method obtains has often been coated with the solvent adding in building-up process.In prior art, produce technique existence and stability, homogeneity and the dispersed poor defect of the organic liquor colloidal sol of Z 250.
Summary of the invention
To the object of the invention is the ferroferric oxide nano granules stability, homogeneity and the dispersed poor defect that in order overcoming, adopt prior art to produce, organic liquor colloidal sol of a kind of ferroferric oxide nano granules that can have high stability, high homogeneity and polymolecularity concurrently and its preparation method and application to be provided.
The preparation method who the invention provides a kind of organic liquor colloidal sol of ferroferric oxide nano granules, wherein, the method comprises the following steps:
(1) under high-boiling point alcohol exists, the organic precursor of iron is carried out to thermolysis, and carry out solid-liquid separation, obtain ferroferric oxide nano granules, wherein, the boiling point of described high-boiling point alcohol is 200-300 ℃;
(2) oil soluble ligand solution is mixed with the ferroferric oxide nano granules that step (1) makes, obtain the organic liquor colloidal sol of ferroferric oxide nano granules.
The present invention also provides the organic liquor colloidal sol of the ferroferric oxide nano granules being prepared by aforesaid method, and wherein, in described organic liquor colloidal sol, the hydraulic radius of ferroferric oxide nano granules can regulate and control in 9-17nm.
In addition the application of the organic liquor colloidal sol that, the present invention also provides above-mentioned ferroferric oxide nano granules in the fields such as catalytic desulfurization and pollutent absorption.
Adopt method provided by the invention to prepare ferroferric oxide nano granules, by the organic precursor of iron is carried out to thermolysis, and with oil soluble part, the ferroferric oxide nano granules of gained is modified, can obtain the organic liquor colloidal sol of the ferroferric oxide nano granules of homogeneous grain diameter, good stability, good dispersity.The organic liquor colloidal sol of the ferroferric oxide nano granules of being prepared by the inventive method has more wide application prospect in fields such as catalytic desulfurization and pollutent absorption.In addition, method of the present invention is easy, easy handling, mild condition, and can realize batch production.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Accompanying drawing explanation
Fig. 1 is the X-ray diffractogram of the ferroferric oxide nano granules that makes in the step (1) of embodiment 1;
Fig. 2 A and 2B are respectively transmission electron microscope photo and the particle size distribution figure of the ferroferric oxide nano granules making in the step (1) of embodiment 1;
Fig. 3 A is the transmission electron microscope photo of the ferroferric oxide nano granules that makes in the step (1) of embodiment 1, and Fig. 3 B is the transmission electron microscope photo of the ferroferric oxide nano granules organic liquor colloidal sol of embodiment 1 preparation;
Fig. 4 is through the magnetzation curve figure of the ferroferric oxide nano granules of oleic acid modified in the ferroferric oxide nano granules organic liquor colloidal sol of embodiment 1 preparation;
Fig. 5 is the hydraulic radius figure of ferroferric oxide nano granules in the organic liquor colloidal sol of embodiment 1 preparation.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
According to the preparation method of the organic liquor colloidal sol of ferroferric oxide nano granules provided by the invention, wherein, the method comprises the following steps:
(1) under high-boiling point alcohol exists, the organic precursor of iron is carried out to thermolysis, and carry out solid-liquid separation, obtain ferroferric oxide nano granules, wherein, the boiling point of described high-boiling point alcohol is 200-300 ℃;
(2) oil soluble ligand solution is mixed with the ferroferric oxide nano granules that step (1) makes, obtain the organic liquor colloidal sol of ferroferric oxide nano granules.
According to the present invention, in step (1), the effect of described high-boiling point alcohol is as stablizer and reductive agent.Range of choice for described high-boiling point alcohol is wider, only need its boiling point higher than the temperature of reaction of described thermolysis, preferably, the boiling point of described high-boiling point alcohol is 200-300 ℃, more preferably in situation, described high-boiling point alcohol is selected from one or more in phenylcarbinol, polyoxyethylene glycol (number-average molecular weight is 200-1000, is preferably 400-600), glycol ether and triglycol.
According to the present invention, in step (1), organic precursor of described iron can be existing various organic precursors that can decompose the iron that generates ferroferric oxide nano granules, for example, can be selected from one or more in ferric acetyl acetonade, pentacarbonyl-iron and iron oleate.
The present invention is not particularly limited the quality of the organic precursor of described iron and the ratio of the volume of described high-boiling point alcohol, under preferable case, in the quality of the organic precursor of 0.5g iron, the consumption of described high-boiling point alcohol is 10-30mL, more preferably 15-25mL.
According to the present invention, in step (1), the condition of described thermolysis is not particularly limited, as long as can make organic precursor of iron decompose, generate ferroferric oxide nano granules, for example, the condition of described thermolysis generally includes heat decomposition temperature and thermal decomposition time, preferably, described heat decomposition temperature is 150-200 ℃, and thermal decomposition time is 1-4 hour.
According to the present invention; in step (1); in order to make the better effects if of described pyrolysis; preferably; described pyrolysis carries out under inert atmosphere protection and/or under anhydrous condition; described inert atmosphere refers to not any one gas or the gaseous mixture with reactant and product generation chemical reaction, as one or more in nitrogen and periodic table of elements zero group gas.Keep inert atmosphere method can in reaction system, pass into above-mentioned not with any one gas or the gaseous mixture of reactant and product generation chemical reaction.Described anhydrous condition refers to and is not containing H
2in the situation of O, described high-boiling point alcohol is mixed with organic precursor of described iron and carry out pyrolysis.
According to the present invention, in step (1), the organic precursor of iron is carried out after thermolysis, the thermal decomposition product obtaining is carried out to the method that solid-liquid separation obtains ferroferric oxide nano granules and can be the conventional various solid-liquid separating methods in this area, as long as can separation obtain ferroferric oxide nano granules, for example, the method such as gravity settling, centrifugation, filtration.Because ferroferric oxide nano granules has magnetic, therefore, can preferably adopt the method for magnetic separation to carry out solid-liquid separation and obtain ferroferric oxide nano granules, for example, magnet is being attached on container outer wall, to attract ferroferric oxide nano granules, and solvent is being discharged from container.
According to the present invention, in step (2), described oil soluble part can be existing various oil soluble parts, as long as meet, can combine with the ferroferric oxide nano granules generating, thereby generate the organic liquor colloidal sol of ferroferric oxide nano granules, in order to make the over-all properties of organic liquor colloidal sol of ferroferric oxide nano granules of preparation better, preferably, described oil soluble part is C8-C20, has the saturated of carboxyl or unsaturated aliphatic carboxylic acid, is more preferably selected from one or more in oleic acid, n-caprylic acid and n-capric acid.Described oil soluble ligand solution is that oil soluble part is dissolved in organic solvent and makes, and described organic solvent is the conventional organic solvent in this area, as is selected from one or more in Skellysolve A, normal hexane and normal heptane, and preferably organic solvent is normal hexane.Described oil soluble ligand solution concentration is not particularly limited, under preferable case, when the concentration of described oil soluble ligand solution is more than or equal to 0.01mol/L, more preferably during 0.01-0.05mol/L, the performance of the organic liquor colloidal sol of the ferroferric oxide nano granules of gained is better.
According to the present invention; it is more even for described oil soluble part is mixed with ferroferric oxide nano granules; thereby obtain the organic liquor colloidal sol of the ferroferric oxide nano granules of homogeneous grain diameter; under preferable case, being blended under vibration or ultrasonic effect of described oil soluble part and ferroferric oxide nano granules carried out.
According to the present invention, described preparation method can also comprise: the ferroferric oxide nano granules obtaining with the alcohol washing step (1) of low carbon chain, and to remove high-boiling point alcohol wherein.The object of described washing is in order to remove the high-boiling point alcohol on the ferroferric oxide nano granules surface that thermolysis obtains in step (1), thereby makes the over-all properties of ferroferric oxide nano granules of preparation more excellent.The alcohol of described low carbon chain can be selected from the alcohol of the various low carbon chain of this area routine, as, the alcohol that carbonatoms is C1-C4, specifically can be selected from one or more in methyl alcohol, ethanol, propyl alcohol and butanols, but from composite factors such as price and environmental protection, consider, the alcohol of described low carbon chain is preferably ethanol.
The present invention also provides the organic liquor colloidal sol of the ferroferric oxide nano granules obtaining by aforesaid method, wherein, in described organic liquor colloidal sol, the hydraulic radius of ferroferric oxide nano granules is distributed in the scope of 9-17nm, and in described organic liquor colloidal sol, the hydraulic radius of ferroferric oxide nano granules can regulate and control in 9-17nm.
Method provided by the invention can regulate and control the hydraulic radius of the ferroferric oxide nano granules of preparation.Specifically, in the step (1) of the method for the invention, by controlling the feed way of organic precursor and the condition of thermolysis of high-boiling point alcohol and iron, can control the mean particle size of the ferroferric oxide nano granules obtaining, then the hydraulic radius of the ferroferric oxide nano granules organic liquor colloidal sol can corresponding control obtaining by step (2).
For durther example details:
The organic precursor of example 1 iron and the ratio of high-boiling point alcohol are 0.5g:20mL, after mixed once is even, carry out thermolysis, described heat decomposition temperature is 190-200 ℃, thermal decomposition time is 2-3 hour, pass through thus step (1) and can obtain the ferroferric oxide nano granules that mean particle size is 7nm, then pass through step (2) and can obtain the Z 250 organic liquor colloidal sol that hydraulic radius is 8-9 nanometer;
Reinforced and the thermolysis of example 2 is divided into two sections and carries out, first paragraph, the organic precursor of iron and the ratio of high-boiling point alcohol are 0.5g:20mL, after mixing, carry out first paragraph thermolysis, described heat decomposition temperature is 160-170 ℃, thermal decomposition time is 0.5-1 hour, second segment, organic precursor and the each additional amount of high-boiling point alcohol (ratio is 0.5g:20mL) of adding twice iron are the 20-30% of each raw material in first paragraph, the timed interval of adding material for twice is 25-35min, add after having expected and carry out second segment thermolysis, heat decomposition temperature is 190-200 ℃, thermal decomposition time is 1-2 hour, pass through thus step (1) and can obtain the ferroferric oxide nano granules that mean particle size is 8nm, pass through again step (2) and can obtain the Z 250 organic liquor colloidal sol that hydraulic radius is 9-10 nanometer,
Reinforced and the thermolysis of example 3 is divided into two sections and carries out, first paragraph, the organic precursor of iron and the ratio of high-boiling point alcohol are 0.5g:20mL, after mixing, carry out first paragraph thermolysis, described heat decomposition temperature is 160-170 ℃, thermal decomposition time is 0.5-1 hour, second segment, organic precursor and the each additional amount of high-boiling point alcohol (ratio is 0.5g:20mL) of adding three iron are the 20-30% of each raw material in first paragraph, the timed interval of adding material for twice is 25-35min, add after having expected and carry out second segment thermolysis, temperature is 190-200 ℃, thermal decomposition time is 1-2 hour, pass through thus step (1) and can obtain the ferroferric oxide nano granules that mean particle size is 9nm, pass through again step (2) and can obtain the Z 250 organic liquor colloidal sol that hydraulic radius is 10-11 nanometer.
Above three examples are just controlled the granularity of ferroferric oxide nano granules and the several concrete mode of organic liquor colloidal sol hydraulic radius thereof according to the inventive method; the present invention is not limited to this, prepares the mode that is different from the ferroferric oxide nano granules of the disclosed granularity of above-mentioned example or the Z 250 organic liquor colloidal sol of different hydraulic radiuses be still included in protection scope of the present invention according to same thinking.
The organic liquor colloidal sol of the ferroferric oxide nano granules that the method according to this invention obtains can be widely used in fields such as catalytic desulfurization and pollutent absorption.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out arbitrary combination, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Below with reference to embodiment, the present invention is further illustrated, but therefore do not limit the present invention.
In embodiment, ferric acetyl acetonade (III), pentacarbonyl-iron and iron oleate are purchased from Sigma-Aldrich company, and phenylcarbinol, oleic acid, n-caprylic acid, n-capric acid, polyoxyethylene glycol, triglycol are purchased from chemical reagents corporation of traditional Chinese medicines group;
In organic liquor colloidal sol, the saturation magnetization of ferroferric oxide nano granules is measured by Analysis of Physical instrument (PPMS).
In organic liquor colloidal sol, the hydraulic radius of ferroferric oxide nano granules is measured by nano particle size and Zeta potential analyser (DLS); Wherein, described hydraulic radius refers to the hydraulic radius of nano particle under solution state, refers to that one and true particle have the radius of the imaginary spheroid of identical rate of diffusion, is based on pedesis, by Stokes-Einstein Equation for Calculating, is obtained.
Embodiment 1
The present embodiment is for illustrating the preparation of the organic liquor colloidal sol of ferroferric oxide nano granules provided by the invention.
(1) in the there-necked flask of 100 milliliters, add 0.5 gram of ferric acetyl acetonade (III) and 20 milliliters of phenylcarbinols.Under agitation, logical argon gas deoxygenation 30 minutes, and under argon atmosphere, is warming up to 190 ℃ with the speed of 6 ℃/min, and at 190 ℃, reacts 2 hours, after magnetic resolution, obtains black ferroferric oxide nano particle, and quality is about 0.11 gram.
(2) get 1 milliliter of ferroferric oxide nano granules being made by step (1) (being about 5 milligrams), by twice of washing with alcohol, the oleic acid solutions that is 0.01mol/L by nano particle with 10 ml concns again (organic solvent is normal hexane) is mixed, under room temperature (25 ℃), within ultrasonic 5 minutes, (frequency is 40KHz, power 100% rated output 250W, obtain the organic liquor colloidal sol of the ferroferric oxide nano granules of transparent and homogeneous down together).
X-ray diffractogram is as shown in Figure 1 known, and the product that the present embodiment step (1) makes is ferroferric oxide nano granules.
As shown in Fig. 2 A and 2B and Fig. 3 A, the size-grade distribution of being added up from transmission electron microscope picture, the size-grade distribution of the nano particle making in step (1) is compared with homogeneous, and mean particle size is 7nm.
As shown in Figure 3 B, ferroferric oxide nano granules homogeneity, better dispersed in the organic liquor colloidal sol that the present embodiment makes.
As shown in Figure 4, the saturation magnetization of the ferroferric oxide nano granules of oleic acid modified is 55emu/g.
As shown in Figure 5, the hydraulic radius narrow distribution of the ferroferric oxide nano granules after oleic acid modified, concentrates and is distributed in 9-10nm, has shown good dispersiveness and stability.
The present embodiment is for illustrating the preparation of the organic liquor colloidal sol of ferroferric oxide nano granules provided by the invention.
(1) in 100 milliliters of there-necked flasks, add 0.5 gram of ferric acetyl acetonade (III) and 20 milliliters of phenylcarbinols.Under agitation, logical argon gas deoxygenation 30 minutes, and under argon atmosphere, is warming up to 190 ℃ with the speed of 6 ℃/min, and at 190 ℃, reacts 2 hours, after magnetic resolution, obtains black ferroferric oxide nano particle, and quality is about 0.11 gram.The mean particle size of prepared nano particle is 7nm.
(2) get 1 milliliter of ferroferric oxide nano granules being made by step (1) (being about 5 milligrams), by twice of methanol wash, the n-caprylic acid solution that is 0.01mol/L by nano particle with 10 ml concns again (organic solvent is normal hexane) mixes, in room temperature (25 ℃), descend ultrasonic 5 minutes, obtain the colloidal solution of the ferroferric oxide nano granules of transparent and homogeneous, wherein the saturation magnetization of the ferroferric oxide nano granules after n-caprylic acid is modified is 56emu/g, hydraulic radius is less, and narrow distribution, concentrates and is distributed in 9-10nm.
Embodiment 3
The present embodiment is for illustrating the preparation of the organic liquor colloidal sol of ferroferric oxide nano granules provided by the invention.
(1) in the there-necked flask of 100 milliliters, add 0.5 gram of ferric acetyl acetonade (III) and 20 milliliters of phenylcarbinols.Under agitation, logical argon gas deoxygenation 30 minutes, and under argon atmosphere, rises to 190 ℃ with the speed of 6 ℃/min, and at 190 ℃, reacts 2 hours, after magnetic resolution, obtains black ferroferric oxide nano particle, and quality is about 0.11 gram.Prepared nano particles is about 7nm.
(2) get 1 milliliter of ferroferric oxide nano granules being made by step (1) (being about 5 milligrams), by twice of washing with alcohol, the n-capric acid solution that is 0.02mol/L by nano particle with 10 ml concns again (organic solvent is normal hexane) mixes, in room temperature (25 ℃), descend ultrasonic 5 minutes, obtain the ferroferric oxide nano granules colloidal solution of transparent and homogeneous, wherein the saturation magnetization of the ferroferric oxide nano granules after n-capric acid is modified is 54.5emu/g, hydraulic radius is less, and narrow distribution, concentrates and is distributed in 9-10nm.
Embodiment 4
The present embodiment is for illustrating the preparation of the organic liquor colloidal sol of ferroferric oxide nano granules provided by the invention.
(1) in the there-necked flask of 100 milliliters, add 0.5 gram of ferric acetyl acetonade (III) and 20 milliliters of phenylcarbinols.Under agitation, logical argon gas deoxygenation 30 minutes, and under argon atmosphere, is warming up to 190 ℃ with the speed of 6 ℃/min, and at 190 ℃, reacts 2 hours, after magnetic resolution, makes black ferroferric oxide nano particle, and quality is about 0.11 gram.Prepared nano particles is about 7nm.
(2) get 1 milliliter of ferroferric oxide nano granules being made by step (1) (being about 5 milligrams), by twice of washing with alcohol, the oleic acid solutions that is 0.05mol/L by nano particle with 10 ml concns again (organic solvent is normal hexane) is mixed, in room temperature (25 ℃), descend ultrasonic 5 minutes, obtain the colloidal solution of the ferroferric oxide nano granules of transparent and homogeneous, wherein the saturation magnetization of the ferroferric oxide nano granules after oleic acid modified is 54emu/g, hydraulic radius is less, and narrow distribution, concentrates and is distributed in 9-10nm.
Embodiment 5
The present embodiment is for illustrating the preparation of the organic liquor colloidal sol of ferroferric oxide nano granules provided by the invention.
(1) in the there-necked flask of 100 milliliters, add 0.5 gram of pentacarbonyl-iron and 15 milliliters of polyoxyethylene glycol (number-average molecular weight is 600).Under agitation, logical argon gas deoxygenation 30 minutes, and under argon atmosphere, is warming up to 150 ℃ with the speed of 6 ℃/min, and at 150 ℃, reacts 4 hours, after magnetic resolution, makes black ferroferric oxide nano particle, and quality is about 0.11 gram.Prepared nano particles is about 8nm.
(2) get 1 milliliter of ferroferric oxide nano granules being made by step (1) (being about 5 milligrams), use propyl alcohol washed twice, the n-caprylic acid solution that is 0.03mol/L by nano particle with 10 ml concns again (organic solvent is normal hexane) mixes, in room temperature (25 ℃), descend ultrasonic 5 minutes, obtain the colloidal solution of the ferroferric oxide nano granules of transparent and homogeneous, wherein the saturation magnetization of the ferroferric oxide nano granules after n-caprylic acid is modified is 53.7emu/g, hydraulic radius is less, and narrow distribution, concentrates and is distributed in 10-11nm.
Embodiment 6
The present embodiment is for illustrating the preparation of the organic liquor colloidal sol of ferroferric oxide nano granules provided by the invention.
(1) in the there-necked flask of 100 milliliters, add 0.5 gram of iron oleate and 25 milliliters of triglycols.Under agitation, logical argon gas deoxygenation 30 minutes, and under argon atmosphere, is warming up to 170 ℃ with the speed of 6 ℃/min, and at 170 ℃, reacts 3 hours, after magnetic resolution, makes black ferroferric oxide nano particle, and quality is about 0.11 gram.Prepared nano particles is about 8nm.
(2) get 1 milliliter of ferroferric oxide nano granules being made by step (1) (being about 5 milligrams), use butanols washed twice, the n-capric acid solution that is 0.04mol/L by nano particle with 10 ml concns again (organic solvent is normal hexane) mixes, in room temperature (25 ℃), descend ultrasonic 5 minutes, obtain the colloidal solution of the ferroferric oxide nano granules of transparent and homogeneous, wherein the saturation magnetization of the ferroferric oxide nano granules after n-capric acid is modified is 53.8emu/g, hydraulic radius is less, and narrow distribution, concentrates and is distributed in 10-11nm.
Result from embodiment 1-6, adopt method provided by the invention to prepare ferroferric oxide nano granules, by the organic precursor of iron is carried out to thermolysis, and with oil soluble part, the ferroferric oxide nano granules of gained is modified, can obtain the organic liquor colloidal sol of the ferroferric oxide nano granules of homogeneous grain diameter, good stability, good dispersity.Method of the present invention is easy, easy handling, mild condition, and can realize batch production.
Claims (11)
1. a preparation method for the organic liquor colloidal sol of ferroferric oxide nano granules, is characterized in that, the method comprises the following steps:
(1) under high-boiling point alcohol exists, the organic precursor of iron is carried out to thermolysis, and carry out solid-liquid separation, obtain ferroferric oxide nano granules, wherein, the boiling point of described high-boiling point alcohol is 200-300 ℃;
(2) solution of oil soluble part is mixed with the ferroferric oxide nano granules that step (1) makes, obtain the organic liquor colloidal sol of ferroferric oxide nano granules.
2. preparation method according to claim 1, wherein, in step (1), described high-boiling point alcohol is selected from one or more in phenylcarbinol, polyoxyethylene glycol, glycol ether and triglycol; Organic precursor of described iron is selected from one or more in ferric acetyl acetonade, pentacarbonyl-iron and iron oleate.
3. preparation method according to claim 1 and 2, wherein, in step (1), in the quality of the organic precursor of 0.5g iron, the consumption of described high-boiling point alcohol is 10-30mL, is preferably 15-25mL.
4. preparation method according to claim 1, wherein, in step (1), the condition of described thermolysis comprises: the temperature of thermolysis is 150-200 ℃, the time of thermolysis is 1-4 hour.
5. according to the preparation method described in claim 1 or 4, wherein, described thermolysis is carried out under inert atmosphere protection and/or under anhydrous condition.
6. preparation method according to claim 1, wherein, in step (2), the saturated or unsaturated aliphatic carboxylic acid that described oil soluble part is C8-C20, the organic solvent in the solution of described oil soluble part is selected from one or more in Skellysolve A, normal hexane and normal heptane.
7. preparation method according to claim 6, wherein, in step (2), described oil soluble part is selected from one or more in oleic acid, n-caprylic acid and n-capric acid.
8. according to the preparation method described in claim 1,6 or 7, wherein, in step (2), the concentration of the solution of described oil soluble part, for being more than or equal to 0.01mol/L, is preferably 0.01-0.05mol/L.
9. preparation method according to claim 1, wherein, this preparation method also comprises: the ferroferric oxide nano granules obtaining with the alcohol washing step (1) of low carbon chain, to remove high-boiling point alcohol wherein, wherein, the alcohol that the alcohol that described low-carbon (LC) connects is C1-C4, the alcohol of preferred described low carbon chain is selected from one or more in methyl alcohol, ethanol, propyl alcohol and butanols.
10. the organic liquor colloidal sol of the ferroferric oxide nano granules that in claim 1-9 prepared by the preparation method described in any one, wherein, in described organic liquor colloidal sol, the hydraulic radius of ferroferric oxide nano granules can regulate and control in 9-17nm.
The application of the organic liquor colloidal sol of ferroferric oxide nano granules in catalytic desulfurization and pollutent absorption described in 11. claims 10.
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| CN106861697A (en) * | 2017-02-27 | 2017-06-20 | 中南大学 | New class fenton catalyst that a kind of ferroferric oxide nano granules are combined with silicon oxide nanofiber and preparation method thereof |
| CN111434380A (en) * | 2019-01-11 | 2020-07-21 | 北京化工大学 | Preparation method and application of oil-soluble monodisperse metal oxide nano catalyst |
| CN111434380B (en) * | 2019-01-11 | 2021-12-21 | 北京化工大学 | Preparation method and application of oil-soluble monodisperse metal oxide nano catalyst |
| CN112142115A (en) * | 2019-06-27 | 2020-12-29 | 南京中科拜尔医学技术有限公司 | Preparation method of superparamagnetic micron-sized magnetic beads |
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