CN103723774B - 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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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 hydrosol of a kind of ferroferric oxide nano granules and its preparation method and application.
Background technology
The Organic hydrosol of ferroferric oxide nano granules is a kind of magnetic Nano material having major application to be worth in fields such as catalytic desulfurization and pollutent absorption.In prior art, coprecipitation method can only prepare the Z 250 water-sol, and easily reunites, dispersed bad; Hydrothermal method prepares the reaction conditions that ferroferric oxide nano granules needs the harshnesses such as High Temperature High Pressure, and energy consumption is higher and reaction is unstable; The ferroferric oxide nano granules that high temperature thermal decomposition method obtains often has been coated with the solvent added in building-up process.The technique existence and stability of the Organic hydrosol of Z 250, homogeneity and dispersed poor defect is produced in prior art.
Summary of the invention
The object of the invention is, in order to overcome the ferroferric oxide nano granules stability, homogeneity and the dispersed poor defect that adopt prior art to produce, to provide a kind of and can have Organic hydrosol of the ferroferric oxide nano granules of high stability, high homogeneity and polymolecularity and its preparation method and application concurrently.
The invention provides a kind of preparation method of Organic hydrosol 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 thermolysis, and carries out solid-liquid separation, obtain ferroferric oxide nano granules, wherein, the boiling point of described high-boiling point alcohol is 200-300 DEG C;
(2) ferroferric oxide nano granules obtained with step (1) for oil soluble ligand solution is mixed, obtain the Organic hydrosol of ferroferric oxide nano granules.
Present invention also offers the Organic hydrosol of the ferroferric oxide nano granules prepared by aforesaid method, wherein, the hydraulic radius of ferroferric oxide nano granules controllable in 9-17nm in described Organic hydrosol.
In addition, present invention also offers the application of Organic hydrosol in the fields such as catalytic desulfurization and pollutent absorption of above-mentioned ferroferric oxide nano granules.
Method provided by the invention is adopted to prepare ferroferric oxide nano granules, by the organic precursor of iron is carried out thermolysis, and modify with the ferroferric oxide nano granules of oil soluble part to gained, the Organic hydrosol of ferroferric oxide nano granules of homogeneous grain diameter, good stability, good dispersity can be obtained.The Organic hydrosol of the ferroferric oxide nano granules 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 are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Fig. 1 is the X-ray diffractogram of ferroferric oxide nano granules obtained in the step (1) of embodiment 1;
Fig. 2 A and 2B is respectively transmission electron microscope photo and the particle size distribution figure of ferroferric oxide nano granules obtained in the step (1) of embodiment 1;
Fig. 3 A is the transmission electron microscope photo of ferroferric oxide nano granules obtained in the step (1) of embodiment 1, and Fig. 3 B is the transmission electron microscope photo of ferroferric oxide nano granules Organic hydrosol prepared by embodiment 1;
Fig. 4 is the magnetzation curve figure through the ferroferric oxide nano granules of oleic acid modified in the ferroferric oxide nano granules Organic hydrosol of embodiment 1 preparation;
Fig. 5 is the hydraulic radius figure of ferroferric oxide nano granules in the Organic hydrosol of embodiment 1 preparation.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
According to the preparation method of the Organic hydrosol 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 thermolysis, and carries out solid-liquid separation, obtain ferroferric oxide nano granules, wherein, the boiling point of described high-boiling point alcohol is 200-300 DEG C;
(2) ferroferric oxide nano granules obtained with step (1) for oil soluble ligand solution is mixed, obtain the Organic hydrosol 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 DEG C, more preferably in situation, described high-boiling point alcohol be selected from phenylcarbinol, polyoxyethylene glycol (number-average molecular weight is 200-1000, be preferably 400-600), glycol ether and triglycol one or more.
According to the present invention, in step (1), organic precursor of described iron can be existing various organic precursor that can decompose the iron generating ferroferric oxide nano granules, such as, can be selected from ferric acetyl acetonade, pentacarbonyl-iron and iron oleate one or more.
The present invention is not particularly limited the ratio of the quality of the organic precursor of described iron with 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 organic precursor of iron can be made to decompose generate ferroferric oxide nano granules, such as, the condition of described thermolysis generally includes heat decomposition temperature and thermal decomposition time, preferably, described heat decomposition temperature is 150-200 DEG C, 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 refer to not with any one gas or the gaseous mixture of reactant and product generation chemical reaction, as one or more in nitrogen and periodic table of elements zero group gas.Keep the method for inert atmosphere can for pass in reaction system 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
2when O, described high-boiling point alcohol is mixed with organic precursor of described iron and carries out pyrolysis.
According to the present invention, in step (1), after the organic precursor of iron is carried out thermolysis, the thermal decomposition product obtained being carried out the method that solid-liquid separation obtains ferroferric oxide nano granules can be the conventional various solid-liquid separating method in this area, as long as can be separated and obtain ferroferric oxide nano granules, such as, the method such as gravity settling, centrifugation, filtration.Because ferroferric oxide nano granules has magnetic, therefore, the method for Magneto separate preferably can be adopted to carry out solid-liquid separation and obtain ferroferric oxide nano granules, such as, magnet is being attached on container outer wall, to attract ferroferric oxide nano granules, and is discharging in flux from container.
According to the present invention, in step (2), described oil soluble part can be existing various oil soluble part, can combine with the ferroferric oxide nano granules generated as long as meet, thus generate the Organic hydrosol of ferroferric oxide nano granules, in order to the over-all properties of the Organic hydrosol making the ferroferric oxide nano granules of preparation is 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.It is obtained that described oil soluble ligand solution is that oil soluble part is dissolved in organic solvent, and described organic solvent is this area conventional organic solvent, one or more as being selected from Skellysolve A, normal hexane and normal heptane, and preferred 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 hydrosol of the ferroferric oxide nano granules of gained is better.
According to the present invention; more even in order to make described oil soluble part mix with ferroferric oxide nano granules; thus obtain the Organic hydrosol of the ferroferric oxide nano granules of homogeneous grain diameter; under preferable case, described oil soluble part and being blended in of ferroferric oxide nano granules are vibrated or are carried out under ultrasonic effect.
According to the present invention, described preparation method can also comprise: the ferroferric oxide nano granules obtained with the alcohol washing step (1) of low carbon chain, to remove high-boiling point alcohol wherein.The object of described washing is the high-boiling point alcohol on the ferroferric oxide nano granules surface obtained in order to thermolysis in removing step (1), thus makes the over-all properties of the 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, carbonatoms is the alcohol of C1-C4, specifically can be selected from one or more in methyl alcohol, ethanol, propyl alcohol and butanols, but consider from the composite factor such as price and environmental protection, the alcohol of described low carbon chain is preferably ethanol.
Present invention also offers the Organic hydrosol of the ferroferric oxide nano granules obtained by aforesaid method, wherein, in described Organic hydrosol, the hydraulic radius of ferroferric oxide nano granules is distributed in the scope of 9-17nm, and in described Organic hydrosol, 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, the mean particle size of the ferroferric oxide nano granules obtained can be controlled, then can the hydraulic radius of ferroferric oxide nano granules Organic hydrosol that obtains of corresponding control 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, thermolysis is carried out after mixed once is even, described heat decomposition temperature is 190-200 DEG C, thermal decomposition time is 2-3 hour, can obtain through step (1) ferroferric oxide nano granules that mean particle size is 7nm thus, then can obtain through step (2) the Z 250 Organic hydrosol that hydraulic radius is 8-9 nanometer;
Example 2 is reinforced is divided into two sections to carry out with thermolysis, first paragraph, the organic precursor of iron and the ratio of high-boiling point alcohol are 0.5g:20mL, first paragraph thermolysis is carried out after mixing, described heat decomposition temperature is 160-170 DEG C, thermal decomposition time is 0.5-1 hour, second segment, add the 20-30% that the organic precursor of twice iron and each additional amount of high-boiling point alcohol (ratio is 0.5g:20mL) are each raw material in first paragraph, the timed interval adding material for twice is 25-35min, add after material completes and carry out second segment thermolysis, heat decomposition temperature is 190-200 DEG C, thermal decomposition time is 1-2 hour, the ferroferric oxide nano granules that mean particle size is 8nm can be obtained thus through step (1), the Z 250 Organic hydrosol that hydraulic radius is 9-10 nanometer can be obtained again through step (2),
Example 3 is reinforced is divided into two sections to carry out with thermolysis, first paragraph, the organic precursor of iron and the ratio of high-boiling point alcohol are 0.5g:20mL, first paragraph thermolysis is carried out after mixing, described heat decomposition temperature is 160-170 DEG C, thermal decomposition time is 0.5-1 hour, second segment, add the 20-30% that the organic precursor of three iron and each additional amount of high-boiling point alcohol (ratio is 0.5g:20mL) are each raw material in first paragraph, the timed interval adding material for twice is 25-35min, add after material completes and carry out second segment thermolysis, temperature is 190-200 DEG C, thermal decomposition time is 1-2 hour, the ferroferric oxide nano granules that mean particle size is 9nm can be obtained thus through step (1), the Z 250 Organic hydrosol that hydraulic radius is 10-11 nanometer can be obtained again through step (2).
Above three examples just control the granularity of ferroferric oxide nano granules and the several concrete mode of Organic hydrosol hydraulic radius thereof according to the inventive method; the present invention is not limited to this, and the mode preparing the ferroferric oxide nano granules of the granularity be different from disclosed in above-mentioned example or the Z 250 Organic hydrosol of different hydraulic radius according to same thinking is still included in protection scope of the present invention.
The Organic hydrosol of the ferroferric oxide nano granules that method according to the present 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 characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out arbitrary combination between various different embodiment of the present invention, 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 hydrosol, the saturation magnetization of ferroferric oxide nano granules is measured by Analysis of Physical instrument (PPMS).
In Organic hydrosol, 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, namely refers to that one has the radius of the imaginary spheroid of identical rate of diffusion with true particle, is based on pedesis, is obtained by Stokes-Einstein Equation for Calculating.
Embodiment 1
The present embodiment is for illustration of the preparation of the Organic hydrosol 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, be warming up to 190 DEG C with the speed of 6 DEG C/min, and react 2 hours at 190 DEG C, after magnetic resolution, obtain black ferroferric oxide nano particle, quality is about 0.11 gram.
(2) 1 milliliter of ferroferric oxide nano granules (being about 5 milligrams) obtained by step (1) is got, by washing with alcohol twice, be that the oleic acid solutions (organic solvent is normal hexane) of 0.01mol/L mixes again by nano particle and 10 ml concns, within ultrasonic 5 minutes under room temperature (25 DEG C), (frequency is 40KHz, power 100% rated output 250W, lower same), obtain the Organic hydrosol of the ferroferric oxide nano granules of transparent and homogeneous.
X-ray diffractogram is as shown in Figure 1 known, and the product that the present embodiment step (1) obtains 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 nano particle obtained in step (1) is more homogeneous, and mean particle size is 7nm.
As shown in Figure 3 B, in the Organic hydrosol that the present embodiment is obtained, ferroferric oxide nano granules homogeneity, dispersiveness are better.
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, integrated distribution, at 9-10nm, shows good dispersiveness and stability.
Embodiment 2
The present embodiment is for illustration of the preparation of the Organic hydrosol 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, be warming up to 190 DEG C with the speed of 6 DEG C/min, and react 2 hours at 190 DEG C, after magnetic resolution, obtain black ferroferric oxide nano particle, quality is about 0.11 gram.The mean particle size of prepared nano particle is 7nm.
(2) 1 milliliter of ferroferric oxide nano granules (being about 5 milligrams) obtained by step (1) is got, by methanol wash twice, be that the n-caprylic acid solution (organic solvent is normal hexane) of 0.01mol/L mixes again by nano particle and 10 ml concns, under room temperature (25 DEG C) ultrasonic 5 minutes, obtain the colloidal solution of the ferroferric oxide nano granules of transparent and homogeneous, the saturation magnetization of the ferroferric oxide nano granules wherein after n-caprylic acid is modified is 56emu/g, hydraulic radius is less, and narrow distribution, integrated distribution is at 9-10nm.
Embodiment 3
The present embodiment is for illustration of the preparation of the Organic hydrosol 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, rise to 190 DEG C with the speed of 6 DEG C/min, and react 2 hours at 190 DEG C, after magnetic resolution, obtain black ferroferric oxide nano particle, quality is about 0.11 gram.Prepared nano particles is about 7nm.
(2) 1 milliliter of ferroferric oxide nano granules (being about 5 milligrams) obtained by step (1) is got, by washing with alcohol twice, be that the n-capric acid solution (organic solvent is normal hexane) of 0.02mol/L mixes again by nano particle and 10 ml concns, under room temperature (25 DEG C) ultrasonic 5 minutes, obtain the ferroferric oxide nano granules colloidal solution of transparent and homogeneous, the saturation magnetization of the ferroferric oxide nano granules wherein after n-capric acid is modified is 54.5emu/g, hydraulic radius is less, and narrow distribution, integrated distribution is at 9-10nm.
Embodiment 4
The present embodiment is for illustration of the preparation of the Organic hydrosol 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, be warming up to 190 DEG C with the speed of 6 DEG C/min, and react 2 hours at 190 DEG C, after magnetic resolution, make black ferroferric oxide nano particle, quality is about 0.11 gram.Prepared nano particles is about 7nm.
(2) 1 milliliter of ferroferric oxide nano granules (being about 5 milligrams) obtained by step (1) is got, by washing with alcohol twice, be that the oleic acid solutions (organic solvent is normal hexane) of 0.05mol/L mixes again by nano particle and 10 ml concns, under room temperature (25 DEG C) ultrasonic 5 minutes, obtain the colloidal solution of the ferroferric oxide nano granules of transparent and homogeneous, the saturation magnetization of the ferroferric oxide nano granules wherein after oleic acid modified is 54emu/g, hydraulic radius is less, and narrow distribution, integrated distribution is at 9-10nm.
Embodiment 5
The present embodiment is for illustration of the preparation of the Organic hydrosol 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, be warming up to 150 DEG C with the speed of 6 DEG C/min, and react 4 hours at 150 DEG C, after magnetic resolution, make black ferroferric oxide nano particle, quality is about 0.11 gram.Prepared nano particles is about 8nm.
(2) 1 milliliter of ferroferric oxide nano granules (being about 5 milligrams) obtained by step (1) is got, with propanol rinse twice, be that the n-caprylic acid solution (organic solvent is normal hexane) of 0.03mol/L mixes again by nano particle and 10 ml concns, under room temperature (25 DEG C) ultrasonic 5 minutes, obtain the colloidal solution of the ferroferric oxide nano granules of transparent and homogeneous, the saturation magnetization of the ferroferric oxide nano granules wherein after n-caprylic acid is modified is 53.7emu/g, hydraulic radius is less, and narrow distribution, integrated distribution is at 10-11nm.
Embodiment 6
The present embodiment is for illustration of the preparation of the Organic hydrosol 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, be warming up to 170 DEG C with the speed of 6 DEG C/min, and react 3 hours at 170 DEG C, after magnetic resolution, make black ferroferric oxide nano particle, quality is about 0.11 gram.Prepared nano particles is about 8nm.
(2) 1 milliliter of ferroferric oxide nano granules (being about 5 milligrams) obtained by step (1) is got, wash twice with butanols, be that the n-capric acid solution (organic solvent is normal hexane) of 0.04mol/L mixes again by nano particle and 10 ml concns, under room temperature (25 DEG C) ultrasonic 5 minutes, obtain the colloidal solution of the ferroferric oxide nano granules of transparent and homogeneous, the saturation magnetization of the ferroferric oxide nano granules wherein after n-capric acid is modified is 53.8emu/g, hydraulic radius is less, and narrow distribution, integrated distribution is at 10-11nm.
From the result of embodiment 1-6, method provided by the invention is adopted to prepare ferroferric oxide nano granules, by the organic precursor of iron is carried out thermolysis, and modify with the ferroferric oxide nano granules of oil soluble part to gained, the Organic hydrosol of ferroferric oxide nano granules of homogeneous grain diameter, good stability, good dispersity can be obtained.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 hydrosol 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 thermolysis, and carries out solid-liquid separation, obtain ferroferric oxide nano granules, wherein, the boiling point of described high-boiling point alcohol is 200-300 DEG C;
(2) ferroferric oxide nano granules obtained with step (1) for the solution of oil soluble part is mixed; obtain the Organic hydrosol of ferroferric oxide nano granules; wherein; described oil soluble part be selected from n-caprylic acid and n-capric acid one or both, the concentration of the solution of described oil soluble part is 0.01-0.05mol/L.
2. preparation method according to claim 1, wherein, in step (1), described high-boiling point alcohol be selected from phenylcarbinol, polyoxyethylene glycol, glycol ether and triglycol one or more; The organic precursor of described iron be selected from ferric acetyl acetonade, pentacarbonyl-iron and iron oleate one or more.
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.
4., in preparation method according to claim 3, wherein, in step (1), in the quality of the organic precursor of 0.5g iron, the consumption of described high-boiling point alcohol is 15-25mL.
5. preparation method according to claim 1, wherein, in step (1), the condition of described thermolysis comprises: the temperature of thermolysis is 150-200 DEG C, and the time of thermolysis is 1-4 hour.
6. preparation method according to claim 1 or 5, wherein, described thermolysis is carried out under inert atmosphere protection and/or under anhydrous condition.
7. preparation method according to claim 1, wherein, in step (2), the organic solvent in the solution of described oil soluble part be selected from Skellysolve A, normal hexane and normal heptane one or more.
8. preparation method according to claim 1, wherein, this preparation method also comprises: the ferroferric oxide nano granules obtained with the alcohol washing step (1) of low carbon chain, to remove high-boiling point alcohol wherein, wherein, the alcohol that described low-carbon (LC) connects is the alcohol of C1-C4.
9. preparation method according to claim 8, wherein, the alcohol of described low carbon chain be selected from methyl alcohol, ethanol, propyl alcohol and butanols one or more.
10. the Organic hydrosol of ferroferric oxide nano granules prepared by the preparation method in claim 1-9 described in any one, wherein, the hydraulic radius of ferroferric oxide nano granules controllable in 9-17nm in described Organic hydrosol.
The application of Organic hydrosol in catalytic desulfurization and pollutent absorption of ferroferric oxide nano granules described in 11. claims 10.
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