CN108502964B - A kind of preparation method of magnetic nanometer composite material - Google Patents

A kind of preparation method of magnetic nanometer composite material Download PDF

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CN108502964B
CN108502964B CN201810290451.1A CN201810290451A CN108502964B CN 108502964 B CN108502964 B CN 108502964B CN 201810290451 A CN201810290451 A CN 201810290451A CN 108502964 B CN108502964 B CN 108502964B
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graphene
polyaniline
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CN108502964A (en
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赵鸿雁
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Softlink (Nanjing) Medical Technology Co.,Ltd.
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Nanjing Medical University
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    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28009—Magnetic properties
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/02—Polyamines
    • C08G73/026—Wholly aromatic polyamines
    • C08G73/0266—Polyanilines or derivatives thereof
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    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/34—Organic compounds containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/34—Organic compounds containing oxygen
    • C02F2101/345—Phenols
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F2303/16—Regeneration of sorbents, filters
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2265—Oxides; Hydroxides of metals of iron
    • C08K2003/2275—Ferroso-ferric oxide (Fe3O4)

Abstract

The invention discloses a kind of preparation methods of magnetic nanometer composite material, belong to technical field of composite materials.The magnetic graphene polyaniline nano-composite material is using the alcohol containing 1~5 carbon atom as solvent, by grapheme/polyaniline composite material, FeCl3It is dissolved in the solvent and is ultrasonically treated with sodium acetate, reacted in a high pressure reaction kettle later, magnetic graphene polyaniline nano-composite material can be obtained.The disadvantage that graphene sheet layer easily stacks and simple polyaniline is easy to reunite is overcome using the composite material that the method for the present invention is prepared.With phenolic estrogen in this kind of adsorbent absorption water, the absorption property better than magnetic graphene material and magnetic polyaniline material is shown.Graphene through magnetic material and Polyaniline-modified not only increases the adsorption efficiency to phenolic estrogen, as well as magnetism possessed by the material itself, keeps its separation relatively easy.Therefore, the present invention has the advantages that absorption is efficient, easy to operate.

Description

A kind of preparation method of magnetic nanometer composite material
The application is the applying date are as follows: on 01 07th, 2016, application No. is a kind of 201610010126.6, titles are as follows: magnetic The divisional application of the patent of invention of property graphene polyaniline nano-composite material and preparation method thereof.
Technical field
The invention belongs to technical field of composite materials, are related to a kind of modified composite adsorbing material more particularly to one of graphene Kind magnetic graphene polyaniline nano-composite material and preparation method thereof and the material answering in the enrichment of phenols environmental estrogens With.
Background technique
Nonyl phenol, octyl phenol and bisphenol-A belong to phenols environmental estrogens, to the potential risk of environment and human health It has attracted wide attention.Nonyl phenol and octyl phenol can accumulate in vivo as endocrine disruptor, and pass through food Chain enters human body, to human cancer cell growth and fecundity can generate and seriously affect, because due to preferential danger has been classified as by European Union Evil substance.The content of nonyl phenol must not be higher than 0.1% in the commodity such as European Union 2003/53/EC instruction regulation textile.International Environmental Protection Clearly stipulate that forbidding during textile production in " Oeko-TexStandard 1000 " that weaving association works out and promulgates Use nonyl phenol.Bisphenol-A is also a kind of incretion interferent, will cause difference to the reproductive development of mammal and aquatic animal The influence of degree.On October 18th, 2008, Her Majesty the Queen in right of Canada as represented by the minister of Healt announce that bisphenol-A is hazardous substance, and nonimportation and pin Sell the polycarbonate baby bottles containing bisphenol-A.What Norway's contamination control administration promulgated " is consuming about limitation special harmful substance Use in product " (PoHS instruction) the also use of limitation bisphenol-A in the consumer goods.
Currently used for detect phenols environmental estrogens Main Analysis detection method have spectrophotometry, fluorimetry, Gas chromatography, gas chromatographymass spectrum, liquid chromatography, liquid-mass chromatography method etc..Wherein color-matter joint technology detection limit is low, clever Sensitivity is high, selectivity is good, but instrument price is expensive, and testing cost is very high.Swash further, since phenols present in environmental sample is female Cellulose content is very low, and background interference is big, and even expensive chromatograph-mass spectrometer coupling technology is also incompetent to the detection of some samples For power, other existing analysis methods more can not meet the detection of micro phenolic estrogen in environment, therefore develop with height The sample pretreating method of effect selectivity and accumulation rate, wherein key is the adsorbent material that exploitation has high efficiency of additive capability.
Summary of the invention
There is the π-πconjugation rich in electronics in graphene, provides possibility for the induced adsorption of organic matter.But graphite Alkene lamellar structure is easy to reunite, and cannot effectively embody its high specific surface area advantage, and graphene surface official in actual use Can single group one, for the characteristic of phenols environmental estrogens, inventor by pay creative labor selectivity in graphene Amino polymer in surface modification, with the hydrogen bond of the amino and the hydroxyl in phenols environmental estrogens that are protonated by material surface And inducing action power, improve absorption of the material to phenols environmental estrogens.Therefore the present invention has following three goal of the invention:
The first purpose of this invention is to provide a kind of magnetic graphene polyaniline for the above technical problems to receive Nano composite material.
Another object of the present invention is to provide a kind of magnetic graphene polyaniline for the above technical problems to receive The preparation method of nano composite material.
A further object of the invention is to provide a kind of utilization magnetic graphene polyphenyl for the above technical problems The method that amine nanocomposite is enriched with phenols environmental estrogens
The purpose of the present invention can be achieved through the following technical solutions:
A kind of magnetic graphene polyaniline nano-composite material, the material are to be prepared via a method which to obtain:
Using the alcohol containing 1~5 carbon atom as solvent, mass ratio is followed successively by 1~5:1~10:1~10 graphene/poly- Aniline composite material, FeCl3It is dissolved in the solvent and is ultrasonically treated with sodium acetate, carry out in a high pressure reaction kettle later anti- It answers, magnetic graphene polyaniline nano-composite material can be obtained.
A kind of preparation method of magnetic graphene polyaniline nano-composite material, this method is with the alcohol containing 1~5 carbon atom For solvent, mass ratio is followed successively by 1~5:1~10:1~10 grapheme/polyaniline composite material, FeCl3It is molten with sodium acetate It in the solvent and is ultrasonically treated, is reacted in a high pressure reaction kettle later, magnetic graphene polyaniline can be obtained Nanocomposite.
As preferred: in magnetic graphene polyaniline nano-composite material and preparation method thereof, graphene/polyaniline is compound Material: FeCl3: the mass ratio of sodium acetate is 1~3:1~5:5~10；The power of ultrasonic treatment is 300~500W, and the time is 0.5~1.5h；The temperature reacted in autoclave is 150~250 DEG C, and the time of reaction is 4~48h, preferably reaction under high pressure The temperature reacted in kettle is 180~200 DEG C, and the time of reaction is 4~10h.The alcohol containing 1~5 carbon atom is selected from first At least one of alcohol, ethyl alcohol, ethylene glycol and diethylene glycol, the alcohol for preferably comprising 1~5 carbon atom is ethylene glycol and diethylene glycol Mixed liquor.
Grapheme/polyaniline composite material described in technical solution of the present invention is to be prepared via a method which to obtain: by oxygen It is ultrasonically treated after graphite and solvent mixing, obtains graphene oxide solution；It is added and contains in the graphene oxide solution The hydrochloric acid solution of aniline simultaneously stirs evenly, and obtains mixed liquor；(NH4) will be contained2S2O8Hydrochloric acid solution be added to the mixed liquor In reacted, obtain grapheme/polyaniline composite material after reaction.
As preferred: in the preparation method of grapheme/polyaniline composite material, the solvent is selected from water, ethyl alcohol, second two At least one of pure and mild diethylene glycol；Graphite oxide: aniline: (NH4)2S2O8Mass ratio be 1~5:1~5:4~10.Institute The mass ratio of aniline and hydrochloric acid is 1.5~3:1 in the hydrochloric acid solution containing aniline stated, and is contained (NH4)2S2O8Hydrochloric acid solution in (NH4)2S2O8Mass ratio with hydrochloric acid is 15~35:1.The power of ultrasonic treatment is 300~500W, and the time is 0.5~1.5h.
It is a kind of rich to phenols environmental estrogens using the above-mentioned magnetic graphene polyaniline nano-composite material being prepared The method of collection, this method using magnetic graphene polyaniline nano-composite material as adsorbent material, by adsorbent material be added to containing It in the solution of phenols environmental estrogens and is uniformly mixed, to guarantee that absorption is abundant；Use magnet by adsorbent material after absorption sufficiently It is separated with solution；The adsorbent material for having adsorbed phenols environmental estrogens is eluted using eluting solvent after separation, is washed Solution after collecting elution after de- is to get the phenols environmental estrogens to after being enriched with；It is preferred that the eluant, eluent is selected from first At least one of alcohol, ethyl alcohol and acetic acid.
GO/PANI described in technical solution of the present invention is graphene polyaniline composite material, and the MGO/PANI is magnetic Property graphene polyaniline nano-composite material, the M/PANI be magnetic polyaniline composite material, the M/GO be magnetism Grapheme material.
Beneficial effects of the present invention:
Magnetic graphene polyaniline nano-composite material stable chemical performance prepared by the present invention, large specific surface area, absorption Performance is strong.Graphene is modified using aniline and magnetic material, graphene sheet layer is overcome and easily stacks and simple polyphenyl Amine disadvantage easy to reunite.With phenolic estrogen in this kind of adsorbent absorption water, show better than magnetic graphene material and magnetism The absorption property of polyaniline material.Graphene through magnetic material and Polyaniline-modified not only increases the suction to phenolic estrogen Attached efficiency keeps its separation relatively easy as well as magnetism possessed by the material itself.Therefore, the present invention has absorption Efficiently, advantage easy to operate.
Detailed description of the invention
Fig. 1 (a) is graphene oxide transmission electron microscope picture used in embodiment 1, and Fig. 1 (b) is the graphite that embodiment 1 is prepared Alkene/polyaniline composite material transmission electron microscope picture, Fig. 1 (c) are the transmission electricity for the MGO/PANI-1 material that embodiment 1 is prepared Mirror figure.
Fig. 2 be the magnetic graphene polyaniline nano-composite material that is prepared of embodiment 1 under condition of different pH to several The adsorption efficiency curve of kind phenolic estrogen.
Fig. 3 is the magnetic graphene polyaniline nano-composite material hysteresis graph that embodiment 1 is prepared.
Fig. 4 is effect pair before and after the magnetic graphene polyaniline nano-composite material Magnetic Isolation that embodiment 1 is prepared Than figure.
Specific embodiment
Below with reference to embodiment, the present invention will be further described, and but the scope of the present invention is not limited thereto:
Embodiment 1
The graphite oxide for weighing 0.14g is placed in the three-neck flask equipped with 60mL deionized water, super with ultrasonic power 300W Sonication 1h obtains graphene oxide solution.0.28g aniline is added in the graphene oxide solution and 0.2mol/L hydrochloric acid is molten Liquid 20mL, electric stirring 30min.It is added dropwise under ice-water bath later and enters to contain 0.68g (NH4)2S2O80.05mol/L hydrochloric acid There is color change in reaction solution in solution 20mL, 5min, becomes blackish green.Electric stirring stops reaction after reacting 6h, respectively Several times with water and ethyl alcohol eccentric cleaning, 60 DEG C of vacuum drying obtain blackish green product, as grapheme/polyaniline composite material.
It is the ethylene glycol of 1:1 and the mixed liquor of diethylene glycol as solvent using volume ratio, 0.1g graphene/polyaniline is compound Material, 0.4gFeCl3It is dissolved in solvent with 0.7g sodium acetate, 1h is ultrasonically treated with ultrasonic power 300W, has been transferred to later poly- In the stainless steel autoclave of tetrafluoroethene liner, autoclave is heated to 190 DEG C, reaction 6h is maintained, is cooled to room Temperature.Product progress Magnetic Isolation collection for several times with second alcohol and water wash products can be obtained for 60 DEG C in a vacuum drying oven MGO/PANI-1 material.Its saturation magnetization is 48.14emu/g, as shown in Figure 3.
In addition, surface is smooth and deposits as can be seen that graphene oxide (GO) is very thin lamellar structure from Fig. 1 (a) In more fold；As can be seen that graphene Polyaniline (GO/PANI) is also lamellar structure, polyphenyl from Fig. 1 (b) Amine is uniformly covered on graphene surface and does not destroy lamellar structure, but can be seen that lamellar spacing increases from the shade of gauffer； As can be seen that magnetic graphene Polyaniline (MGO/PANI-1) is still lamellar structure from Fig. 1 (c), surface distribution Fe3O4Magnetic-particle, particle diameter is between 100-200nm.
Embodiment 2
The graphite oxide for weighing 0.14g is placed in the three-neck flask equipped with 60mL deionized water, super with ultrasonic power 450W Sonication 1h obtains graphene oxide solution.0.42g aniline and 0.2mol/L hydrochloric acid solution 20mL, electric stirring 30min is added. It is added dropwise under ice-water bath later and enters to contain 1.24g (NH4)2S2O80.05mol/L hydrochloric acid solution 20mL, 5min in reaction it is molten There is color change in liquid, becomes blackish green.Electric stirring stops reaction after reacting 6h, uses water and ethyl alcohol eccentric cleaning number respectively Time, 60 DEG C of vacuum drying obtain blackish green product, as grapheme/polyaniline composite material.
It is the ethylene glycol of 1:1 and the mixed liquor of diethylene glycol as solvent using volume ratio, 0.2g graphene/polyaniline is compound Material, 0.4gFeCl3It is dissolved in solvent with 0.9g sodium acetate, 1h is ultrasonically treated with ultrasonic power 450W, has been transferred to later poly- In the stainless steel autoclave of tetrafluoroethene liner, autoclave is heated to 190 DEG C, reaction 6h is maintained, is cooled to room Temperature.For several times with second alcohol and water wash products MGO/PANI-2 material is can be obtained into for 60 DEG C in a vacuum drying oven in collection of products Material.
Comparative example 1
Electric stirring 30min after 0.42g aniline and 0.2mol/L hydrochloric acid solution 20mL mixing.It is added dropwise under ice-water bath Contain 1.24g (NH4)2S2O80.05mol/L hydrochloric acid solution 20mL, electric stirring stops reaction after reacting 6h, respectively with water and Several times, 60 DEG C of vacuum drying obtain PANI material to ethyl alcohol eccentric cleaning.
Be the ethylene glycol of 1:1 and the mixed liquor of diethylene glycol as solvent using volume ratio, by 0.2gPANI material, 0.4gFeCl3It is dissolved in solvent with 0.9g sodium acetate, 1h is ultrasonically treated with ultrasonic power 450W, has been transferred to polytetrafluoroethyl-ne later In the stainless steel autoclave of alkene liner, autoclave is heated to 190 DEG C, reaction 6h is maintained, is cooled to room temperature.It will produce Object is collected, and for several times with second alcohol and water wash products, M/PANI material can be obtained for 60 DEG C in a vacuum drying oven.
Comparative example 2
It is the ethylene glycol of 1:1 and the mixed liquor of diethylene glycol as solvent using volume ratio, by 0.2g graphene, 0.4gFeCl3 It is dissolved in solvent with 0.9g sodium acetate, 1h is ultrasonically treated with ultrasonic power 450W, is transferred to polytetrafluoroethyllining lining later In stainless steel autoclave, autoclave is heated to 190 DEG C, reaction 6h is maintained, is cooled to room temperature.By collection of products, For several times with second alcohol and water wash products, M/GO material can be obtained for 60 DEG C in a vacuum drying oven.
Performance detection
The material that embodiment 1, embodiment 2, comparative example 1 and comparative example 2 are prepared is respectively applied to nonyl phenol, octyl The measurement of phenol and bisphenol-A absorption property, specific as follows:
The MGO/PANI-2 that MGO/PANI-1 material that 4mg embodiment 1 is prepared, embodiment 2 are prepared respectively The M/GO material that the M/PANI and comparative example 2 that material, comparative example 1 are prepared are prepared is placed in 15mL teat glass, is added The mixed standard solution 0.5mL for entering nonyl phenol, octyl phenol and bisphenol-A that concentration is 1mg/mL, is settled to 5mL with water, obtains Concentration C0For the prepare liquid of 100mg/L, cap.At room temperature in vortex instrument with 2200rpm/min be vortexed one section Time guarantees that absorption is abundant.The material for having adsorbed determinand is separated with water sample using magnet, with supernatant after HPLC measurement absorption The mass concentration of liquid, according to formulaCalculate adsorbance.Obtain the adsorbance (mg/g) of each material.C0, C difference For the mass concentration of absorption front and back solution, mg/L；M is the quality of adsorbent material, unit g；Q is the adsorbance of adsorbent, mg/ g。
The concentration of nonyl phenol, octyl phenol and bisphenol-A supernatant after table 1 adsorbs
The adsorbance of 2 n nonylphenol of table, octyl phenol and bisphenol-A
Material Nonyl phenol Octyl phenol Bisphenol-A
MGO/PANI-1 70.5mg/g 79.8mg/g 60.38mg/g
MGO/PANI-2 73.4mg/g 82.1mg/g 64.26mg/g
M/PANI 22.8mg/g 23.4mg/g 18.2mg/g
M/GO 40.5mg/g 42.7mg/g 38.3mg/g
We can see that the material phenolic estrogen being prepared with the method for the present invention from the content of Tables 1 and 2 Absorption in, the adsorbance of each substance magnetic polyaniline nano material more compound than unused graphene oxide has 50mg/g or so Raising.Compared with also not having mentioning close to 20-30mg/g with the adsorbance of the magnetic graphene nano material of Polyaniline-modified It is high.Change the product absorption property slight difference that different material ratio is prepared, adsorbance is all significantly increased.
2. the survey that the material that embodiment 1 and embodiment 2 are prepared is applied to nonyl phenol, octyl phenol and bisphenol-A clearance rate It is fixed
Weigh 4mg MGO/PANI-1 respectively, MGO/PANI-2, M/PANI and M/GO material are placed in 15mL teat glass, The mixed standard solution 0.5mL that concentration is the nonyl phenol of 0.1mg/mL, octyl phenol and bisphenol-A is added, 5mL is settled to water, Obtain the prepare liquid that concentration is 10mg/L, cap.At room temperature in vortex instrument with 2200rpm/min be vortexed one section Time guarantees that absorption is abundant.The material for having adsorbed determinand is separated with water sample using magnet, with supernatant after HPLC measurement absorption The mass concentration of liquid, according to formula clearance rate=(c0-c)/c0, calculate clearance rate (%).c0, c be respectively to adsorb front and back solution Mass concentration, mg/L.
Nonyl phenol, octyl phenol and bisphenol-A supernatant mass concentration after table 3 adsorbs
The clearance rate of nonyl phenol, octyl phenol and bisphenol-A after table 4 adsorbs
Material Nonyl phenol Octyl phenol Bisphenol-A
MGO/PANI-1 83% 85% 77%
MGO/PANI-2 82% 83% 80%
M/PANI 27% 30% 23%
M/GO 38% 40% 35%
From in the content of table 3 and table 4 we can see that the material being prepared with the method for the present invention is for a certain concentration In the absorption of phenolic estrogen, the material magnetic polyaniline nanometer more compound than unused graphene oxide for the clearance rate of each substance Material has 50% or more raising.Compared with also not having with the clearance rate of the magnetic graphene nano material of Polyaniline-modified 30% raising.Change the product that is prepared of different material ratio to the clearance rate slight difference of phenolic estrogen, but removes Rate is all significantly increased.
3, the stability of enrichment environment
The nonyl that the MGO/PANI-1 material that embodiment 1 is prepared is 10mg/L to concentration under conditions of different pH Phenol, octyl phenol and bisphenol-A are adsorbed respectively, and adsorption efficiency is as shown in Fig. 2, we can see that the variation pair of pH from Fig. 2 Adsorption effect has little effect, this illustrates that the material is used for the Adsorption of phenols environmental estrogens in environmental water sample hardly It is influenced by the fluctuation of water quality acid-base property, embodies the stability applied to acid and alkali-resistance good in actual environment water sample.
4, separating effect
5mL is dispersed by the MGO/PANI-1 material that 4mg implementation 1 is prepared, the bisphenol-A absorption that concentration is 10mg/L is molten In liquid, MGO/PANI/PAab-1 material can be completely segregated in≤1min, and separating effect is as shown in Figure 4.And existing centrifugation point From needing to be centrifuged 15min at 5000rpm, similar separating effect can be only achieved, and the solution after centrifugation is when taking supernatant There can't be vibration slightly, the particle otherwise precipitated down is easy to scatter again, the degree of difficulty of operation is increased, and It cannot be guaranteed that the material of precipitating will not be got completely, therefore the application of magnetic material substantially increases separation in terms of separation process Efficiency simplifies lock out operation.
5, concentration effect
MGO/PANI-1 the and M/PANI material being prepared in embodiment 1 and comparative example 1 is respectively weighed 4mg to be respectively placed in It is to be placed under room temperature in vortex instrument in the nonyl phenol, octyl phenol and bisphenol-A solution of 1mg/L with 2000rpm's containing 10mL concentration After velocity vortex 40min.Magnetic Isolation removes supernatant, retains magnetic material, and 1mL methanol solution is added in every pipe, and room temperature is underlying It is dense with HPLC measurement eluent in the velocity vortex 30min of 2000rpm, after Magnetic Isolation, collecting eluent in vortex instrument Degree, according to formula γ=C/C0Calculate enrichment times γ.C0, C be respectively the mass concentration of solution and the quality of eluent before adsorbing Concentration, mg/L.
Table 5MGO/PANI-1 material is applied to eluate concentration and enrichment times in phenolic estrogen solution
C(mg/L) Enrichment times γ
Nonyl phenol 9.42 9.4
Octyl phenol 9.28 9.3
Bisphenol-A 9.03 9.0
Table 6M/PANI material is applied to eluate concentration and enrichment times in phenolic estrogen solution
C(mg/L) Enrichment times γ
Nonyl phenol 3.13 3.1
Octyl phenol 3.28 3.3
Bisphenol-A 2.83 2.8
By table 5 and table 6 it is found that the polyaniline material accumulation rate of composite graphite alkene has significant improvement, this is attributed to the fact that The raising of its surface area and the enhancing of dispersibility.It can also be higher to obtain by the volume of raising adsorbent solution in this experiment Enrichment times.

Claims (1)

1. a kind of preparation method of magnetic nanometer composite material, it is characterised in that: the graphite oxide for weighing 0.14g, which is placed in, to be equipped with In the three-neck flask of 60mL deionized water, graphene oxide solution is obtained with ultrasonic power 300W ultrasonic treatment 1h；In the oxidation 0.28g aniline and 0.2mol/L hydrochloric acid solution 20mL, electric stirring 30min are added in graphene solution；Later under ice-water bath Dropwise addition enters to contain 0.68g (NH4)2S2O80.05mol/L hydrochloric acid solution 20mL, 5min in reaction solution there is color change Change, becomes blackish green；Electric stirring stops reaction after reacting 6h, and respectively several times with water and ethyl alcohol eccentric cleaning, 60 DEG C of vacuum are dry It is dry to obtain blackish green product, as grapheme/polyaniline composite material；
It is the ethylene glycol of 1:1 and the mixed liquor of diethylene glycol as solvent using volume ratio, by 0.1g graphene/polyaniline composite wood Material, 0.4gFeCl3It is dissolved in solvent with 0.7g sodium acetate, 1h is ultrasonically treated with ultrasonic power 300W, has been transferred to poly- four later In the stainless steel autoclave of vinyl fluoride liner, autoclave is heated to 190 DEG C, reaction 6h is maintained, is cooled to room temperature； For several times with second alcohol and water wash products MGO/ is can be obtained into for 60 DEG C in a vacuum drying oven in product progress Magnetic Isolation collection PANI-1 material.
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