CN104495950A - Preparation method of carbon encapsulated magnetic C/Fe3O4 nano composite material and application thereof - Google Patents
Preparation method of carbon encapsulated magnetic C/Fe3O4 nano composite material and application thereof Download PDFInfo
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- CN104495950A CN104495950A CN201410625105.6A CN201410625105A CN104495950A CN 104495950 A CN104495950 A CN 104495950A CN 201410625105 A CN201410625105 A CN 201410625105A CN 104495950 A CN104495950 A CN 104495950A
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Abstract
The invention discloses a preparation method of a carbon encapsulated magnetic C/Fe3O4 nano composite material and an application thereof. The invention belongs to the technical field of a magnetic nano-material, and the carbon encapsulated magnetic C/Fe3O4 nano composite material can be prepared by using a hydrothermal method and a thermal decomposition method through synthesis. The carbon encapsulated magnetic C/Fe3O4 nano composite material is used for processing a dye methylene blue in waste water. The preparation method has the beneficial effect of simple process, high material purity, wide application scope, no residues, no toxic and side effect, and easy separation, and can be expected for wide application in environment engineering field.
Description
Technical field
The present invention relates to magnetic Nano material technical field, particularly relate to the magnetic C/Fe that a kind of carbon is coated
3o
4the preparation method of nano composite material and application thereof.
Background technology
Magnetic Fe
3o
4nanoparticle has a wide range of applications (Ji Junhong, Ji Shengfu, Yang Wei, Li Chengyue, magnetic Fe in magnetic fluid, microwave absorbing, water pollutant adsorbing and removing, precious metal recovery, catalysis, target medicine carrier and bioprotein separation etc.
3o
4nanocrystalline preparations and applicatio, chemical progress, 2010,22 (8): 1566-1574).Eighties of last century the eighties, Sugimot and Matijevic two people first successfully prepares the Fe with extremely narrow size-grade distribution
3o
4nano particle.After this, people use number of chemical method also to successfully synthesize Z 250 and ferrite nanometer particle, comprising: coprecipitation method, microemulsion method, microwave plasma method, sol-gel method, pyrolysis method etc.Fe
3o
4nano particle composite material is also one of study hotspot of magnetic Nano material.At present, with the Fe that carbon is coated
3o
4the nano composite material of preparation mainly contains: (1) utilizes glucose as carbon source and Fe
3o
4magnetic core-shell structure is prepared in mixing carbonization, but its shortcoming mostly is spheroidal particle packed structures; (2) with mesoporous SiO
2for templated synthesis Fe
3o
4mesoporous carbon composite material; (3) with the ɑ-Fe of water heat transfer oleic acid-coated
3o
4particle is presoma, more under an argon atmosphere 500 DEG C calcining 1 hour, obtain Fe
3o
4/ C nano matrix material, its shape is fusiform; (4) precipitation from homogeneous solution method is adopted to prepare gac/Fe
3o
4particle and carbon nanotube/Fe
3o
4the matrix materials such as particle.But, the Fe that these carbon are coated
3o
4the common feature of nano composite material is: specific surface area is low, and porosity is low, and material surface does not increase its functional group through further functionalization, therefore makes the Fe that carbon is coated
3o
4the application of nano composite material be restricted.
Summary of the invention
The coated Fe of carbon is being prepared for above method
3o
4the defect of nano composite material aspect, the present invention adopts FeCl
36H
2first O prepares Fe
2o
3, using sodium alginate as superparamagnetism Fe
3o
4core surface wraps the carbon source of carbon shell, by the Fe prepared
2o
3mix with the sodium alginate soln dissolved, then this mixed solution syringe is dropwise added drop-wise to the CaCl prepared
2in solution, at Fe
2o
3core surface generates fast the precursor that one deck can form carbon shell, finally calcining under Ar protection, prepares a kind ofly to have the coated magnetic C/Fe of carbon
3o
4nano composite material.Method of the present invention greatly can shorten and has the coated magnetic C/Fe of carbon
3o
4the preparation time of nano composite material, and this of preparation has the coated magnetic C/Fe of carbon
3o
4nano composite material, not only as the carrier of magnetic catalyst, and can also have potential using value in absorption, separation, biological medicine etc.
The present invention adopts following technical scheme:
The magnetic C/Fe that carbon of the present invention is coated
3o
4the concrete steps of the preparation method of nano composite material are as follows:
(1) Fe
2o
3the preparation of nanoparticle:
Under room temperature, in the teflon-lined reactor containing water, add FeCl
36H
2o and Na
2b
4o
7after stirring, add NaOH, be stirred to after dissolving completely, reactor being placed on temperature is isothermal reaction 1-12h at 120-140 DEG C, cool afterwards to room temperature, reaction solution is carried out centrifugation with 4000-10000r/min, collecting precipitation thing, wash respectively with distilled water and dehydrated alcohol, then be positioned over the interior oven dry of vacuum drying oven of 60 ~ 80 DEG C, obtain Fe
2o
3nanoparticle;
(2) the magnetic C/Fe that carbon is coated
3o
4the preparation of nano composite material presoma:
By the Fe that described step (1) obtains
2o
3nanoparticle joins in the sodium alginate soln dissolved, and stirs 30-50min, obtains mixing solutions; The mixing solutions syringe obtained dropwise is added drop-wise to the CaCl prepared
2in solution, and constantly stir, obtain the magnetic C/Fe that carbon is coated
3o
4nano composite material presoma;
(3) by magnetic C/Fe coated for the carbon obtained in described step (2)
3o
4nano composite material presoma, carries out drying in the vacuum drying oven being placed in 60 ~ 80 DEG C;
(4) by magnetic C/Fe coated for the dried carbon obtained in described step (3)
3o
4nano composite material presoma is placed in porcelain boat; then porcelain boat is placed in tube furnace flat-temperature zone to calcine; calcination condition is: under the Ar gas shielded that flow is 10 ~ 400ml/min; 400 ~ 500 DEG C are warming up to the heat-up rate of 1 ~ 10 DEG C; insulation 2 ~ 3h; carry out carbonization, after carburizing reagent, under Ar gas shielded, be cooled to room temperature, obtain the magnetic C/Fe that carbon is coated
3o
4nano composite material.
In step (1), FeCl
36H
2o, Na
2b
4o
7be 1 ~ 2:2 ~ 4:8 ~ 16 with the mol ratio of NaOH; FeCl
36H
2o is 1 ~ 2:40mmol/ml with the molecular volume ratio of aqueous solvent; Preferred FeCl
36H
2o, Na
2b
4o
7be 1:2:8 with the mol ratio of NaOH; FeCl
36H
2o is 1:40mmol/ml with the molecular volume ratio of aqueous solvent.
Preferred: in step (1), hydrothermal temperature is 130 DEG C, reaction times 6h, and centrifugation rotating speed is 6000r/min, and drying temperature is 70 DEG C.
In step (2), the concentration of sodium alginate used is 15g/L, CaCl
2concentration be 21g/L, the solvent required for the sodium alginate soln of joining is distilled water, Fe
2o
3the weight ratio of nanoparticle and sodium alginate is 1:1, the CaCl joined
2solvent required for solution is distilled water, Fe
2o
3nanoparticle and CaCl
2weight ratio be 1:7.
Preferred: in step (4), the magnetic C/Fe that carbon is coated
3o
4nano composite material presoma calcination condition is: under the Ar gas shielded that flow is 200ml/min, be warming up to 450 DEG C with the heat-up rate of 5 DEG C, and insulation 2.5h, carries out carbonization, be cooled to room temperature after carburizing reagent under Ar gas shielded.
The magnetic C/Fe that the carbon prepared of method of the present invention is coated
3o
4the application of nano composite material in fractionation by adsorption methylene blue, concrete treatment process is: by magnetic C/Fe coated for carbon
3o
4nano composite material joins in the waste water containing methylene blue, and water temperature is 25 DEG C, constant temperature oscillation 12h in 25 DEG C of thermostatic baths, and externally-applied magnetic field is separated, and leaves standstill, to supernatant liquor without sorbent material suspended substance, is shifted out by supernatant liquor.
The initial total concn of aqueous solution Methylene Blue is 20.94 ~ 29.91mg/L.
By magnetic C/Fe
3o
4nano composite material joins in the aqueous solution containing methylene blue, magnetic C/Fe
3o
4after nano composite material completes absorption to methylene blue, its saturated extent of adsorption reaches 32.76mg/g.
The magnetic C/Fe that carbon is coated
3o
4nano composite material joins in the aqueous solution containing methylene blue, and after reaching adsorption equilibrium, the concentration of methylene blue is 0.73 ~ 4.05mg/L.
The magnetic C/Fe that carbon of the present invention is coated
3o
4nano composite material, its advantage is: which overcome Fe
3o
4the shortcomings such as poor, the easy reunion of nanoparticles stable.And by the present invention prepare by the coated magnetic C/Fe of carbon of preparation
3o
4nano composite material its preparation method technique is simple, and cost is low, safety non-toxic, environmentally safe, and output is comparatively large, is suitable for suitability for industrialized production and use.The magnetic C/Fe that the carbon that the present invention obtains is coated
3o
4nano composite material is due to the superparamagnetism of its uniqueness or ferromegnetism, and the oh group of carbon shell layer surface some amount is conducive to improving, and it is water-soluble, can be used for magneticsubstance (magnetic fluid, electromagnetic wave absorbent material, magnetic recording material), multiple fields such as support of the catalyst, nuclear magnetic resonance, target medicine carrier.And the magnetic C/Fe that carbon is coated
3o
4nano composite material also can be used for the adsorption treatment to organic pollutant wastewater.
Accompanying drawing explanation
Fig. 1 is the coated magnetic C/Fe of carbon prepared by embodiment 1
3o
4the X-ray powder diffraction figure of nano composite material.
Fig. 2 is the coated magnetic C/Fe of carbon prepared by embodiment 1
3o
4the magnetic hysteresis loop of nano composite material.
Fig. 3 is the coated magnetic C/Fe of carbon prepared by embodiment 1
3o
4nano composite material under 77.5K to N
2adsorption desorption curve and size distribution curve.
Fig. 4 is the coated magnetic C/Fe of carbon prepared by embodiment 1
3o
4nano composite material scanning electronic microscope mirror picture.
Fig. 5 is the coated magnetic C/Fe of carbon that at 25 DEG C prepared by embodiment 1
3o
4nano composite material is to methylene blue adsorption number kinetic curve figure.
Fig. 6 is the coated magnetic C/Fe of carbon that at 25 DEG C prepared by embodiment 1
3o
4nano composite material is to different concns methylene blue adsorption number graphic representation.
Embodiment
Below by specific embodiment, the present invention will be further elaborated; but not limiting the scope of the invention; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Embodiment 1:
The magnetic C/Fe that carbon is coated
3o
4the preparation method of nano composite material, adopt hydrothermal method and thermal decomposition method, take pure water as solvent, concrete steps are: under room temperature, in the teflon-lined reactor containing 40ml water, add 1mmol FeCl
36H
2o and 2mmolNa
2b
4o
7, after stirring, add 8mmol solid state N aOH, be stirred to after dissolving completely, reactor being placed on temperature is isothermal reaction 12h at 140 DEG C, cools afterwards, reaction solution is carried out centrifugation with 6000r/min.Collecting precipitation thing, point distilled water, absolute ethanol washing for several times, is then positioned over the interior oven dry of vacuum drying oven of 60 DEG C; Then the 1.5g Fe will obtained
2o
3it is in 15g/L sodium alginate soln that nanoparticle joins the concentration of having dissolved, and after stirring 30min, it is the CaCl of 21g/L that the mixing solutions syringe obtained dropwise is added drop-wise to the concentration prepared
2in solution, and constantly stir, the magnetic C/Fe that the carbon obtained is coated
3o
4nano composite material presoma; By magnetic C/Fe coated for the carbon obtained
3o
4nano composite material presoma, carries out drying in the vacuum drying oven being placed in 60 DEG C; Finally, by magnetic C/Fe coated for dried carbon
3o
4nano composite material presoma is placed in porcelain boat; then porcelain boat is placed in tube furnace flat-temperature zone to calcine; calcination condition is: under the Ar gas shielded that flow is 10ml/min; 400 DEG C are warming up to the heat-up rate of 1 DEG C; insulation 2h; carry out carbonization, after carburizing reagent, under Ar gas shielded, be cooled to room temperature, obtain the magnetic C/Fe that carbon is coated
3o
4nano composite material.Its X-ray powder diffraction figure, to N
2adsorption desorption curve and scanning electron microscope diagram sheet respectively as shown in Fig. 1, Fig. 3 and Fig. 4.
By magnetic C/Fe coated for the carbon of above-mentioned preparation
3o
4nano composite material joins in the 8ml aqueous solution containing methylene blue, and the starting point concentration of methylene blue is 29.91mg/L, and after absorption 6h, the concentration of methylene blue is 1.85mg/L, and clearance is 93.8%.Now, outside magnetic field effect magnetic C/Fe
3o
4nano composite material is adsorbed to side in water.
As seen from Figure 2, this magnetic C/Fe
3o
4nano composite material shows good superparamagnetic behavior, and its saturation magnetization reaches 34.10emu/g.As seen from Figure 5, this magnetic C/Fe
3o
4nano composite material is adsorbed in 6 hours to methylene blue, just can reach balance, and at incipient front 8min, it is very fast to the adsorption rate of methylene blue.What Fig. 6 provided is under different methylene blue starting point concentration, this magnetic C/Fe
3o
4nano composite material is to the matching of dye adsorption Langmuir adsorption curve, and the result according to fitting of a straight line shows, this magnetic C/Fe
3o
4the saturated extent of adsorption of nano composite material to subunit indigo plant reaches 32.76mg/g, and good linear fit result display, this magnetic C/Fe
3o
4nano composite material is adsorbed as monolayer adsorption to methylene blue.
Embodiment 2:
The magnetic C/Fe that carbon is coated
3o
4the preparation method of nano composite material, adopt hydrothermal method and thermal decomposition method, take pure water as solvent, concrete steps are: under room temperature, in the teflon-lined reactor containing 40ml water, add 1mmol FeCl
36H
2o and 2mmolNa
2b
4o
7, after stirring, add 8mmol solid state N aOH, be stirred to after dissolving completely, reactor being placed on temperature is isothermal reaction 12h at 140 DEG C, cools afterwards, reaction solution is carried out centrifugation with 6000r/min.Collecting precipitation thing, point distilled water, absolute ethanol washing for several times, is then positioned over the interior oven dry of vacuum drying oven of 80 DEG C; Then the 1.5g Fe will obtained
2o
3it is in 15g/L sodium alginate soln that nanoparticle joins the concentration of having dissolved, and after stirring 30min, it is the CaCl of 21g/L that the mixing solutions syringe obtained dropwise is added drop-wise to the concentration prepared
2in solution, and constantly stir, the magnetic C/Fe that the carbon obtained is coated
3o
4nano composite material presoma; By magnetic C/Fe coated for the carbon obtained
3o
4nano composite material presoma, carries out drying in the vacuum drying oven being placed in 60 DEG C; Finally, by magnetic C/Fe coated for dried carbon
3o
4nano composite material presoma is placed in porcelain boat; then porcelain boat is placed in tube furnace flat-temperature zone to calcine; calcination condition is: under the Ar gas shielded that flow is 10ml/min; 500 DEG C are warming up to the heat-up rate of 1 DEG C; insulation 2h; carry out carbonization, after carburizing reagent, under Ar gas shielded, be cooled to room temperature, obtain the magnetic C/Fe that carbon is coated
3o
4nano composite material.
Embodiment 3:
The magnetic C/Fe that carbon is coated
3o
4the preparation method of nano composite material, adopt hydrothermal method and thermal decomposition method, take pure water as solvent, concrete steps are: under room temperature, in the teflon-lined reactor containing 80ml water, add 2mmol FeCl
36H
2o and 4mmolNa
2b
4o
7, after stirring, add 16mmol solid state N aOH, be stirred to after dissolving completely, reactor being placed on temperature is isothermal reaction 12h at 140 DEG C, cools afterwards, reaction solution is carried out centrifugation with 6000r/min.Collecting precipitation thing, point distilled water, absolute ethanol washing for several times, is then positioned over the interior oven dry of vacuum drying oven of 60 DEG C; Then the 1.5g Fe will obtained
2o
3it is in 15g/L sodium alginate soln that nanoparticle joins the concentration of having dissolved, and after stirring 30min, it is the CaCl of 21g/L that the mixing solutions syringe obtained dropwise is added drop-wise to the concentration prepared
2in solution, and constantly stir, the magnetic C/Fe that the carbon obtained is coated
3o
4nano composite material presoma; By magnetic C/Fe coated for the carbon obtained
3o
4nano composite material presoma, carries out drying in the vacuum drying oven being placed in 60 DEG C; Finally, by magnetic C/Fe coated for dried carbon
3o
4nano composite material presoma is placed in porcelain boat; then porcelain boat is placed in tube furnace flat-temperature zone to calcine; calcination condition is: under the Ar gas shielded that flow is 10ml/min; 400 DEG C are warming up to the heat-up rate of 1 DEG C; insulation 2h; carry out carbonization, after carburizing reagent, under Ar gas shielded, be cooled to room temperature, obtain the magnetic C/Fe that carbon is coated
3o
4nano composite material.Embodiment 4:
The magnetic C/Fe that carbon is coated
3o
4the preparation method of nano composite material, adopt hydrothermal method and thermal decomposition method, take pure water as solvent, concrete steps are: under room temperature, in the teflon-lined reactor containing 40ml water, add 1mmol FeCl
36H
2o and 2mmolNa
2b
4o
7, after stirring, add 8mmol solid state N aOH, be stirred to after dissolving completely, reactor being placed on temperature is isothermal reaction 12h at 120 DEG C, cools afterwards, reaction solution is carried out centrifugation with 8000r/min.Collecting precipitation thing, point distilled water, absolute ethanol washing for several times, is then positioned over the interior oven dry of vacuum drying oven of 60 DEG C; Then the 1.5g Fe will obtained
2o
3it is in 15g/L sodium alginate soln that nanoparticle joins the concentration of having dissolved, and after stirring 30min, it is the CaCl of 21g/L that the mixing solutions syringe obtained dropwise is added drop-wise to the concentration prepared
2in solution, and constantly stir, the magnetic C/Fe that the carbon obtained is coated
3o
4nano composite material presoma; By magnetic C/Fe coated for the carbon obtained
3o
4nano composite material presoma, carries out drying in the vacuum drying oven being placed in 60 DEG C; Finally, by magnetic C/Fe coated for dried carbon
3o
4nano composite material presoma is placed in porcelain boat; then porcelain boat is placed in tube furnace flat-temperature zone to calcine; calcination condition is: under the Ar gas shielded that flow is 10ml/min; 400 DEG C are warming up to the heat-up rate of 1 DEG C; insulation 2h; carry out carbonization, after carburizing reagent, under Ar gas shielded, be cooled to room temperature, obtain the magnetic C/Fe that carbon is coated
3o
4nano composite material.
Embodiment 5:
The magnetic C/Fe that carbon is coated
3o
4the preparation method of nano composite material, adopt hydrothermal method and thermal decomposition method, take pure water as solvent, concrete steps are: under room temperature, in the teflon-lined reactor containing 40ml water, add 1mmol FeCl
36H
2o and 2mmolNa
2b
4o
7, after stirring, add 8mmol solid state N aOH, be stirred to after dissolving completely, reactor being placed on temperature is isothermal reaction 12h at 120 DEG C, cools afterwards, reaction solution is carried out centrifugation with 8000r/min.Collecting precipitation thing, point distilled water, absolute ethanol washing for several times, is then positioned over the interior oven dry of vacuum drying oven of 60 DEG C; Then the 1.5g Fe will obtained
2o
3it is in 15g/L sodium alginate soln that nanoparticle joins the concentration of having dissolved, and after stirring 30min, it is the CaCl of 21g/L that the mixing solutions syringe obtained dropwise is added drop-wise to the concentration prepared
2in solution, and constantly stir, the magnetic C/Fe that the carbon obtained is coated
3o
4nano composite material presoma; By magnetic C/Fe coated for the carbon obtained
3o
4nano composite material presoma, carries out drying in the vacuum drying oven being placed in 80 DEG C; Finally, by magnetic C/Fe coated for dried carbon
3o
4nano composite material presoma is placed in porcelain boat; then porcelain boat is placed in tube furnace flat-temperature zone to calcine; calcination condition is: under the Ar gas shielded that flow is 10ml/min; 400 DEG C are warming up to the heat-up rate of 1 DEG C; insulation 2h; carry out carbonization, after carburizing reagent, under Ar gas shielded, be cooled to room temperature, obtain the magnetic C/Fe that carbon is coated
3o
4nano composite material.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalents thereof.
Claims (9)
1. the magnetic C/Fe that a carbon is coated
3o
4the preparation method of nano composite material, is characterized in that: the concrete steps of described method are as follows:
(1) Fe
2o
3the preparation of nanoparticle:
Under room temperature, in the teflon-lined reactor containing water, add FeCl
36H
2o and Na
2b
4o
7after stirring, add NaOH, be stirred to after dissolving completely, reactor being placed on temperature is isothermal reaction 1-12h at 120-140 DEG C, cool afterwards to room temperature, reaction solution is carried out centrifugation with 4000-10000r/min, collecting precipitation thing, wash respectively with distilled water and dehydrated alcohol, then be positioned over the interior oven dry of vacuum drying oven of 60 ~ 80 DEG C, obtain Fe
2o
3nanoparticle;
(2) the magnetic C/Fe that carbon is coated
3o
4the preparation of nano composite material presoma:
By the Fe that described step (1) obtains
2o
3nanoparticle joins in the sodium alginate soln dissolved, and stirs 30-50min, obtains mixing solutions; The mixing solutions syringe obtained dropwise is added drop-wise to the CaCl prepared
2in solution, and constantly stir, obtain the magnetic C/Fe that carbon is coated
3o
4nano composite material presoma;
(3) by magnetic C/Fe coated for the carbon obtained in described step (2)
3o
4nano composite material presoma, carries out drying in the vacuum drying oven being placed in 60 ~ 80 DEG C;
(4) by magnetic C/Fe coated for the dried carbon obtained in described step (3)
3o
4nano composite material presoma is placed in porcelain boat; then porcelain boat is placed in tube furnace flat-temperature zone to calcine; calcination condition is: under the Ar gas shielded that flow is 10 ~ 400ml/min; 400 ~ 500 DEG C are warming up to the heat-up rate of 1 ~ 10 DEG C; insulation 2 ~ 3h; carry out carbonization, after carburizing reagent, under Ar gas shielded, be cooled to room temperature, obtain the magnetic C/Fe that carbon is coated
3o
4nano composite material.
2. the magnetic C/Fe that carbon as claimed in claim 1 is coated
3o
4the preparation method of nano composite material, is characterized in that: in step (1), FeCl
36H
2o, Na
2b
4o
7be 1 ~ 2:2 ~ 4:8 ~ 16 with the mol ratio of NaOH; FeCl
36H
2o is 1 ~ 2:40mmol/ml with the molecular volume ratio of aqueous solvent.
3. the magnetic C/Fe that carbon as claimed in claim 2 is coated
3o
4the preparation method of nano composite material, is characterized in that: in step (1), FeCl
36H
2o, Na
2b
4o
7be 1:2:8 with the mol ratio of NaOH; FeCl
36H
2o is 1:40mmol/ml with the molecular volume ratio of aqueous solvent, and hydrothermal temperature is 130 DEG C, reaction times 6h, and centrifugation rotating speed is 6000r/min, and drying temperature is 70 DEG C.
4. the magnetic C/Fe that carbon as claimed in claim 1 is coated
3o
4the preparation method of nano composite material, is characterized in that: in step (2), and the solvent of the sodium alginate soln of joining is distilled water, Fe
2o
3the weight ratio of nanoparticle and sodium alginate is 1:1, the CaCl joined
2the solvent of solution is distilled water, Fe
2o
3nanoparticle and CaCl
2weight ratio be 1:7.
5. the magnetic C/Fe that carbon as claimed in claim 1 is coated
3o
4the preparation method of nano composite material, is characterized in that: in step (4), the magnetic C/Fe that carbon is coated
3o
4nano composite material presoma calcination condition is: under the Ar gas shielded that flow is 200ml/min, be warming up to 450 DEG C with the heat-up rate of 5 DEG C, and insulation 2.5h, carries out carbonization, be cooled to room temperature after carburizing reagent under Ar gas shielded.
6. the magnetic C/Fe that the carbon prepared of the method as described in any one of claim 1-5 is coated
3o
4the application of nano composite material in fractionation by adsorption methylene blue, is characterized in that: concrete treatment process is: by magnetic C/Fe coated for carbon
3o
4nano composite material joins in the waste water containing methylene blue, and water temperature is 25 DEG C, constant temperature oscillation 12h in 25 DEG C of thermostatic baths, and externally-applied magnetic field is separated, and leaves standstill, to supernatant liquor without sorbent material suspended substance, is shifted out by supernatant liquor.
7. apply as claimed in claim 6, it is characterized in that: the initial total concn of aqueous solution Methylene Blue is 20.94 ~ 29.91mg/L.
8. apply as claimed in claim 6, it is characterized in that: by magnetic C/Fe
3o
4nano composite material joins in the aqueous solution containing methylene blue, magnetic C/Fe
3o
4after nano composite material completes absorption to methylene blue, its saturated extent of adsorption reaches 32.76mg/g.
9. apply as claimed in claim 6, it is characterized in that: the magnetic C/Fe that carbon is coated
3o
4nano composite material joins in the aqueous solution containing methylene blue, and after reaching adsorption equilibrium, the concentration of methylene blue is 0.73 ~ 4.05mg/L.
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