CN102441385A - Method for preparing metal modified active carbon fibers and removing methylene blue in water - Google Patents
Method for preparing metal modified active carbon fibers and removing methylene blue in water Download PDFInfo
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- CN102441385A CN102441385A CN2011103388405A CN201110338840A CN102441385A CN 102441385 A CN102441385 A CN 102441385A CN 2011103388405 A CN2011103388405 A CN 2011103388405A CN 201110338840 A CN201110338840 A CN 201110338840A CN 102441385 A CN102441385 A CN 102441385A
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- methylene blue
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Abstract
The invention discloses a preparation method of metal modified active carbon fibers and a method for removing methylene blue in water by using the prepared metal modified active carbon fibers as an electrode. The preparation method comprises the following steps: first, electrospinning a fiber membrane by using a mixture of polyvinyl alcohol and glutaraldehyde or polyacrylonitrile; then, immersing the fiber membrane in one or more heavy metal solutions, drying, then carrying out high temperature carbonization in the presence of inert gas, cooling to room temperature, and then thoroughly reducing at a temperature of 250 DEG C to obtain the metal modified active carbon fibers. The method for removing methylene blue in water comprises the following steps: using the metal modified active carbon fibers as an anode and platinum as a cathode, and energizing by putting the anode and the cathode in water containing methylene blue to carry out electrocatalysis decolouring reaction on methylene blue. The prepared metal modified active carbon fibers have good dispersibility, can effectively improve the catalysis efficiency of metal catalysts, and can effectively remove methylene blue in water.
Description
Technical field
The invention belongs to water treatment field, concrete relating to, a kind ofly remove the electrode of methylene blue in the water and utilize this electrode original position electro-Fenton reaction to remove the method for methylene blue in water.
Background technology
Along with constant development of economy, problem of environmental pollution increasingly sharpens in recent years, and wherein organic pollution is handled and the drinking water safety problem, has caused widely and has paid close attention to.In the organic pollution of all kinds of poisonous, harmful, difficult degradations, dyestuff is a typical compound wherein, and methylene blue is a kind of dye reagent, is one of typical organic pollution in the dyeing waste water.
Based on electrochemical techniques energy savings, minimizing are polluted in handling pollutant effluents application and development prospect; As clean technologies; Its research and application in the environment ambit obtains fast, development widely, the electrochemical treatments of environmental organic pollutant and the Electrochemical Detection of pollutant and analytically also obtained to develop fast.
Utilization nano metal, CNT and nano materials such as composite, nano wire and nanometer film thereof are the new developing direction of chemically modified electrode as the decorative material of chemically modified electrode.Particularly nano metal Fe, Pd and CNT owing to have excellent catalytic activity, stable character, easy preparation method, occupy more and more important position in the modified electrode material.Wherein nanometer iron is abundant as the source, and cheap water treatment agent is applied as the water environment repair materials with except that some pollutants in anhydrating, and has obtained the good of numerous scholars in recent years, and vast potential for future development is arranged.
Summary of the invention
The object of the present invention is to provide a kind of inexpensive that how to prepare; Active high; Be used for handling the method for the metal modified active carbon fiber of water organic pollution, and utilize the original position electro-Fenton reaction to remove the method for methylene blue in the water as electrode with this metal modified active carbon fiber.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention realizes through following technical scheme:
A kind of preparation method of metal modified active carbon fiber, it may further comprise the steps:
At first, mixture or the polyacrylonitrile electricity with polyvinyl alcohol and glutaraldehyde spins tunica fibrosa; Then; Said tunica fibrosa is immersed in one or more heavy metal solutions; After the oven dry, the high temperature cabonization through under the inert gas conditions is cooled to room temperature; Again 250 ℃ of down thoroughly reduction, the activated carbon fiber film that can prepare dispersed loaded with nano metal uniformly is metal modified active carbon fiber both.
A kind of metal modified active carbon fiber of making through above-mentioned preparation method of utilizing is removed the method for methylene blue in the water as motor, and it may further comprise the steps:
At first, as anode, platinum is as negative electrode with metal modified active carbon fiber; Then, insert in the water that contains methylene blue and switch on, the electro-catalysis decoloring reaction just takes place in said methylene blue, can remove the methylene blue in the water.
Preferably, identical as the metal modified active carbon fiber of anode with surface area as the platinum of negative electrode.
Preferably, at first use rare nitric acid dousing as the metal modified active carbon fiber of anode, the distilled water washing is to neutral then; As the platinum of negative electrode with rare nitric acid clean surface oxide
Preferably, the current value of energising is 100mA.
Preferably, before the reaction of switching on, the water that at first will contain methylene blue is adjusted to the ph value under 3 ~ 7 acid to neutral environment.
Compared with prior art, the present invention has following beneficial effect:
1. the method for methylene blue is simple in the preparation of metal modified active carbon fiber of the present invention and the removal water, and cost is low, is fit to large-scale production;
2. the present invention is spun into surface-functionalized nanofiber with polymer or metal nanoparticle easily together;
3. the metal modified active carbon fiber of the preparation of the preparation method through metal modified active carbon fiber of the present invention has bigger specific area, and porosity is high;
4. the metal modified active carbon fiber of the preparation of the preparation method through metal modified active carbon fiber of the present invention is easy to catalyst and separates and catalyst recovery with product;
5. the metal modified active carbon fiber of the preparation of the preparation method through metal modified active carbon fiber of the present invention is because the electrostatic fibre porous network structure is fit to do the catalytic reaction carrier;
6. the metal modified active carbon fiber of the preparation of the preparation method through metal modified active carbon fiber of the present invention; After being processed as active carbon fiber fabrics; Electrical conductivity is preferably arranged, and this carbon nano-fiber cloth need not become piece with adhesives, just can directly use as electrode material;
7. the metal modified active carbon fiber of the preparation of the preparation method through metal modified active carbon fiber of the present invention is a kind of good three-diemsnional electrode material.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention, understands technological means of the present invention in order can more to know, and can implement according to the content of specification, below with preferred embodiment of the present invention specify as after.
The specific embodiment
A kind of preparation method of metal modified active carbon fiber, it may further comprise the steps:
At first, mixture or the polyacrylonitrile electricity with polyvinyl alcohol and glutaraldehyde spins tunica fibrosa; Then; Said tunica fibrosa is immersed in one or more heavy metal solutions; After the oven dry, the high temperature cabonization through under the inert gas conditions is cooled to room temperature; Again 250 ℃ of down thoroughly reduction, the activated carbon fiber film that can prepare dispersed loaded with nano metal uniformly is metal modified active carbon fiber both.
A kind of metal modified active carbon fiber of making through above-mentioned preparation method of utilizing is removed the method for methylene blue in the water as motor, and it may further comprise the steps:
The methylene blue solution of getting 250ml 4mg/L adds in the reactive tank, evenly stirs with magnetic stirring apparatus.Platinum electrode and metal modified active carbon fiber electrode are chosen the surface area of identical size.Platinum is with rare nitric acid clean surface oxide before the embodiment, and metal modified active carbon fiber is used rare nitric acid dousing, and the distilled water washing is to neutral then.
Among the embodiment, preferably 3 ~ 7 acid is to neutral environment, because under the highly basic condition, the oxygen uptake side reaction aggravates and competes with decoloring reaction, and under the acid condition, can suppress the electrochemical hydrogenation reduction-decolor that helps solution of oxygen evolution reaction.
Consider when electric current constantly increases that degrade in the identical time, the electric weight of consumption will correspondingly increase; Electrode polarization phenomenon and passivation reaction aggravation in the degradation process; The oxygen uptake side reaction constantly aggravates, so will select the current strength that is fit to, present embodiment selects 100mA proper.Under constant voltage, degrade, every at a distance from the 2min sampling, the reaction time is 1 h.
Reaction is divided into two processes: direct oxidation, pollutant are attracted on the anode surface, are degraded by direct oxidation through anode electron transfer effect then.Produce a large amount of hydroxyl radical free radicals (OH) near the indirect oxidation, electrode and finally be converted into CO with the organic matter reaction
2And H
2O.
The electrochemistry decoloring reaction has reached 95% percent of decolourization when 30min, given full play to the metal modified active carbon fiber good electrical conductivity, the catalytic capability on high absorption property and surface.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within guarantor's scope of the present invention.
Claims (6)
1. the preparation method of a metal modified active carbon fiber is characterized in that, may further comprise the steps:
At first, mixture or the polyacrylonitrile electricity with polyvinyl alcohol and glutaraldehyde spins tunica fibrosa; Then; Said tunica fibrosa is immersed in one or more heavy metal solutions; After the oven dry, the high temperature cabonization through under the inert gas conditions is cooled to room temperature; Again 250 ℃ of down thoroughly reduction, the activated carbon fiber film that can prepare dispersed loaded with nano metal uniformly is metal modified active carbon fiber both.
2. a method of removing methylene blue in the water is characterized in that, may further comprise the steps:
At first, as anode, platinum is as negative electrode with metal modified active carbon fiber; Then, insert in the water that contains methylene blue and switch on, the electro-catalysis decoloring reaction just takes place in said methylene blue, can remove the methylene blue in the water.
3. the method for methylene blue in the removal water according to claim 2 is characterized in that: identical with surface area as the platinum of negative electrode as the metal modified active carbon fiber of anode.
4. the method for methylene blue in the removal water according to claim 2 is characterized in that: the metal modified active carbon fiber as anode is at first used rare nitric acid dousing, and the distilled water washing is to neutral then; As the platinum of negative electrode with rare nitric acid clean surface oxide.
5. the method for methylene blue in the removal water according to claim 2 is characterized in that: the current value of energising is 100mA.
6. the method for methylene blue in the removal water according to claim 2 is characterized in that: before the reaction of switching on, the water that at first will contain methylene blue is adjusted to the ph value under 3 ~ 7 acid to neutral environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011103388405A CN102441385A (en) | 2011-11-01 | 2011-11-01 | Method for preparing metal modified active carbon fibers and removing methylene blue in water |
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| CN2011103388405A CN102441385A (en) | 2011-11-01 | 2011-11-01 | Method for preparing metal modified active carbon fibers and removing methylene blue in water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972178A (en) * | 2016-01-08 | 2017-07-21 | 福特全球技术公司 | Calalyst layer of fuel cell and forming method thereof and the fuel cell including it |
| CN112023714A (en) * | 2020-07-21 | 2020-12-04 | 东华大学 | Functional carbon fiber membrane capable of adsorbing and degrading micro-plastic and preparation method thereof |
| CN112803030A (en) * | 2020-12-29 | 2021-05-14 | 河北工业大学 | Preparation method and application method of electro-Fenton composite membrane cathode |
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| CN1840751A (en) * | 2005-03-30 | 2006-10-04 | 中国科学技术大学 | Process for preparing polyvinyl alcohol -based active carbon fiber |
| KR100759103B1 (en) * | 2006-06-19 | 2007-09-19 | 주식회사 나노테크닉스 | Method of preparing for pan/phenolic-resin-based carbon nanofibers and activated carbon nanofibers by electrospinning |
| CN101164906A (en) * | 2007-09-30 | 2008-04-23 | 中山大学 | Electrooxidation degradation method for dyestuff waste water by using active carbon fibre |
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2011
- 2011-11-01 CN CN2011103388405A patent/CN102441385A/en active Pending
Patent Citations (3)
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| CN1840751A (en) * | 2005-03-30 | 2006-10-04 | 中国科学技术大学 | Process for preparing polyvinyl alcohol -based active carbon fiber |
| KR100759103B1 (en) * | 2006-06-19 | 2007-09-19 | 주식회사 나노테크닉스 | Method of preparing for pan/phenolic-resin-based carbon nanofibers and activated carbon nanofibers by electrospinning |
| CN101164906A (en) * | 2007-09-30 | 2008-04-23 | 中山大学 | Electrooxidation degradation method for dyestuff waste water by using active carbon fibre |
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| L. LI, ET AL.: "In-situ encapsulation of nickel particles in electrospun carbon nanofibers and the resultant electrochemical performance", 《CHEMISTRY-A EUROPEAN JOURNAL》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972178A (en) * | 2016-01-08 | 2017-07-21 | 福特全球技术公司 | Calalyst layer of fuel cell and forming method thereof and the fuel cell including it |
| CN112023714A (en) * | 2020-07-21 | 2020-12-04 | 东华大学 | Functional carbon fiber membrane capable of adsorbing and degrading micro-plastic and preparation method thereof |
| CN112023714B (en) * | 2020-07-21 | 2021-06-18 | 东华大学 | Functional carbon fiber membrane capable of adsorbing and degrading micro-plastic and preparation method thereof |
| CN112803030A (en) * | 2020-12-29 | 2021-05-14 | 河北工业大学 | Preparation method and application method of electro-Fenton composite membrane cathode |
| CN112803030B (en) * | 2020-12-29 | 2022-06-10 | 河北工业大学 | Preparation method and application method of electro-Fenton composite membrane cathode |
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Application publication date: 20120509 |