CN104157884B - Three-diemsnional electrode brush that a kind of 3D graphene oxide aeroge is modified and preparation method and application - Google Patents
Three-diemsnional electrode brush that a kind of 3D graphene oxide aeroge is modified and preparation method and application Download PDFInfo
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- CN104157884B CN104157884B CN201410371362.1A CN201410371362A CN104157884B CN 104157884 B CN104157884 B CN 104157884B CN 201410371362 A CN201410371362 A CN 201410371362A CN 104157884 B CN104157884 B CN 104157884B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8825—Methods for deposition of the catalytic active composition
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8605—Porous electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
- H01M4/8882—Heat treatment, e.g. drying, baking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention belongs to electrode material technical field, disclose three-diemsnional electrode brush of a kind of 3D graphene oxide aeroge modification and preparation method and application.The preparation method of described three-diemsnional electrode brush is for first preparing the dispersion liquid of graphene oxide powder, then three-diemsnional electrode brush is totally submerged in graphene oxide dispersion liquid, it is aged 20～24h at 55～60 DEG C, then through 40～60 DEG C of freeze-drying process under liquid nitrogen frozen, vacuum state, the three-diemsnional electrode brush that 3D graphene oxide aeroge is modified is obtained.The three-diemsnional electrode brushing tool that this 3D graphene oxide aeroge is modified has bigger specific surface area and preferable biocompatibility, can be used for the preparation of anode of microbial fuel cell material.
Description
Technical field
The invention belongs to electrode material technical field, be specifically related to a kind of 3D graphene oxide aeroge and modify
Three-diemsnional electrode brush and preparation method and application.
Background technology
The scale expanding microbiological fuel cell (MFC) ensures that good operational effect is MFC application simultaneously
Process topmost difficulty in waste water.MFC is difficult to the reason that scale be that power density is too low and expense is too high,
Electrode is the principal element determining the output of MFC power and construction cost, and its Anodic is microbial growth
And the key of extracellular electron transmission efficiency, therefore select excellent performance, the anode material of low cost, if
Count rational anode construction particularly significant.The present invention is i.e. intended to design a kind of novel amplify and expense is low
High performance anode, is applied to waste water for MFC scale and processes a kind of new approaches of offer.
Increase the available anode surface area of microorganism, it is achieved effective electric current collection is design large scale MFC
The key of anode.Therefore, in terms of anode construction angle, the anode of three-dimensional structure is at same reactor volume
Under be provided that the surface area more much bigger than two-dimentional anode, be more beneficial for hoisting power density and save capital cost.
In conventional three dimensional anodes structure, blocking is less likely to occur black lead brush electrode, more excellent than granulation mass electrode has more
Gesture.But, forefathers' research shows, the graphite fibre of black lead brush anode can be gathered into clump in MFC operation,
Reduce the surface area that microorganism can adhere to, hinder substrate toward the diffusion within black lead brush, be unfavorable for further
Improve anode performance.Additionally, the resistivity of material with carbon element to compare metal material much higher, anode is expanded scale
After can bring the high Ohmic resistance of comparison, and cost is of a relatively high.
In order to solve these problems, the present invention is with reference to a kind of stainless steel brush support conduct of black lead brush electrode design
Anode base material and current-collector, at stainless steel brush area load grapheme material thus prepare a kind of high performance anode.
This stainless steel brush configuration is similar with black lead brush, has very high mechanical strength yet with it, can not only be
Loading anode material stably and lastingly in longtime running, and blocking will not occur and be gathered into clump, can more have
Utilize to effect the surface area of anode material, it is ensured that substrate spreads.Other stainless steel brushing tool has very high electric conductivity,
Can more efficiently collected current, be greatly reduced anode ohmic resistance.It is low that simultaneously stainless steel brush also has cost
The advantage such as honest and clean, simple and easy to get, decreases electrode expense.
Grapheme material has very high specific surface area, good electric conductivity and biocompatibility, is preferable
MFC anode material.Wherein graphene oxide can not only promote that bacterial growth is bred, moreover it is possible to strengthens bacterium
Extracellular electron transmission, has more more preferable biocompatibility than reduced graphene oxide serving.And compare ordinary graphite
Alkene electrode, 3D graphene-structured decreases the stacking of graphene sheet layer, reduces between Graphene and current-collector
Resistance.Therefore set forth herein the cryodesiccated method of use make 3D graphene oxide aerogel carried
On stainless steel brush support, make use of the advantageous property of Graphene as far as possible, shorten electronics at high electricity simultaneously as far as possible
The distance of resistance region transmission.In fact, in terms of macroscopic perspective, three-dimensional grapheme be more beneficial for actual application,
Material reuse and preparing on a large scale.
Content of the invention
In place of solving the shortcoming and defect of prior art, the primary and foremost purpose of the present invention is to provide a kind of 3D
The preparation method of the three-diemsnional electrode brush that graphene oxide aeroge is modified.
Another object of the present invention is to provide a kind of 3D Graphene oxygen being prepared by above-mentioned preparation method
The three-diemsnional electrode brush that compound aeroge is modified.
It is still another object of the present invention to provide the three-diemsnional electrode that above-mentioned 3D graphene oxide aeroge is modified
Application in anode of microbial fuel cell material for the brush.
The object of the invention is achieved through the following technical solutions:
The preparation method of the three-diemsnional electrode brush that a kind of 3D graphene oxide aeroge is modified, including following operation
Step:
(1) taking graphene oxide powder deionized water to disperse, compound concentration is 1～5mg mL-1
Graphene oxide dispersion liquid, then this dispersion liquid is put into that supersonic wave cleaning machine is ultrasonically treated makes it disperse
Uniformly；
(2) it is totally submerged three-diemsnional electrode brush in the graphene oxide dispersion liquid of step (1), put into super
Ultrasonically treated 40～the 80min of sound wave cleaning machine, puts into baking oven after taking-up, be aged 20～24h at 55～60 DEG C,
Obtain being attached with the three-diemsnional electrode brush of the graphene oxide hydrosol；
(3) the three-diemsnional electrode brush being attached with the graphene oxide hydrosol that step (2) obtains is immediately placed in
Liquid nitrogen frozen 60～90min, then-40～-60 DEG C of freeze-dryings are processed 2～3 days under vacuum conditions, obtain
Deposition has the three-diemsnional electrode brush of graphene oxide aeroge, strikes off unnecessary aeroge, obtains 3D graphite
The three-diemsnional electrode brush that olefinic oxide aeroge is modified.
Described three-diemsnional electrode brush is preferably with the stainless steel brush of three-dimensional, the three-dimensional graphite brush of titanium skein silk line brush holder；
The more preferably stainless steel brush through pretreatment, described preprocess method is: stainless steel brush is completely submerged in nothing
In water-ethanol, ultrasonic cleaning 30min removes the organic matter on stainless steel brush surface, rushes by deionized water after taking-up
Wash, then submergence ultrasonic cleaning 30min in deionized water, it is standby that pretreatment puts into the drying of 45 DEG C of baking oven after completing
With；Three-diemsnional electrode brush is preferably dimensioned to be a diameter of 2cm, a length of 4cm, brush holder a size of diameter 3mm,
A length of 3cm.
Described graphene oxide powder is prepared by following preparation method:
(1) by dense for 360mL H2SO4The dense H with 40mL3PO4Join after mixing 3.0g graphite flake and
18.0g KMnO4Mixture in, be then heated to 50 DEG C stirring 12h, be poured into 400 after being cooled to room temperature
ML frozen water and hydrogen peroxide that 3mL mass fraction is 30% obtain mixed liquor；
(2) mixed liquor of step (1) metallic screen screens, and is then filtrated to get filtrate by polyester fiber,
To remove the graphite flake having neither part nor lot in reaction；
(3) by the filtrate of step (2) under 4000rpm rotating speed centrifugation 4h, supernatant is decanted, surplus
Remaining solid material is successively with the water of 200mL, the HCl/water solution of 200mL 30% mass fraction and 200mL
Ethanol wash 2 times, after washing every time, mixture is all screened by metallic screen and filters with polyester fiber, filter
Supernatant is decanted, obtains solid material by liquid centrifugation 4h under 4000rpm rotating speed；
(4) solid material of step (3) being added 200mL ether coagulation, the flocculate of generation passes through hole
0.45 μm of footpath PTFE film filters, and the solid matter of gained is at room temperature vacuum dried whole night, obtains Graphene
Oxide powder.
The three-diemsnional electrode that a kind of 3D graphene oxide aeroge being prepared by above-mentioned preparation method is modified
Brush.
The three-diemsnional electrode brush that above-mentioned 3D graphene oxide aeroge is modified is at anode of microbial fuel cell material
Application in material.
Had the advantage that and beneficial effect by the preparation method and obtained product of the present invention:
(1) present invention uses three-diemsnional electrode brush as base material electrode, at projected area and conventional two-dimensional electrode material
Under material the same terms, specific surface area is bigger, and in traditional two-dimentional anode system, expanding electrode size needs phase
Answer ground to expand the volume of reactor, thus add the expense of capital construction too much, and three dimensional anodes has very big
Specific surface area, under identical reactor volume, be provided that bigger surface area, be particularly suited at waste water
The extensive MFC of reason；
(2) graphene oxide is modified in electrode brush by freeze-drying by the present invention, forms 3D knot
The graphene oxide aeroge of structure so that the specific surface area of electrode brush is bigger, and biocompatibility is more preferable；
(3) the three-diemsnional electrode brush that the 3D graphene oxide aeroge of the present invention is modified is used for Microbial fuel
The anode of battery not only has huge specific surface area, and can significantly increase the electricity generation performance of battery, from
And expanded the development and application of microbiological fuel cell.
Brief description
Fig. 1 is the structural representation of the three-diemsnional electrode brush of the 3D graphene oxide aeroge modification of the present invention；
In figure, mark is described as follows: 1-three-diemsnional electrode brush, 2-graphene oxide aeroge；
Fig. 2 is that the three-diemsnional electrode brush of the 3D graphene oxide aeroge modification of the present invention is as Microbial fuel
Structural representation during battery anode material application；In figure, mark is described as follows: 1-battery filling opening, 2-3D
Galvanic anode, 3-amberplex, 4-prepared by the three-diemsnional electrode brush that graphene oxide aeroge is modified locate in advance
Reason graphite felt negative electrode, 5-anode chamber housing, 6-cathode chamber housing, 7-shell holder；
Fig. 3 be the embodiment of the present invention 1～3 3D graphene oxide aeroge modify the stainless steel brush of three-dimensional with
The output power density curve comparison figure of the stainless steel brush (contrast groups) of unmodified；
Fig. 4 be the embodiment of the present invention 1～3 3D graphene oxide aeroge modify the stainless steel brush of three-dimensional with
The longtime running stability comparison diagram of the stainless steel brush (contrast groups) of unmodified.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention do not limit
In this.
The stainless steel brush of three-dimensional used in following example is the stainless steel brush through pretreatment, described pre-
Processing method is: be completely submerged in the stainless steel brush with titanium skein silk line brush holder in absolute ethyl alcohol, ultrasonic clearly
Wash the organic matter removing stainless steel brush surface 30 minutes, with deionized water rinsing after taking-up, then be immersed in from
Ultrasonic cleaning 30min in sub-water, pretreatment puts into 45 DEG C of dry for standby of baking oven after completing；Three-diemsnional electrode brush
A size of a diameter of 2cm, a length of 4cm, brush holder a size of diameter 3mm, a length of 3cm.
Graphene oxide powder used in following example is prepared by following preparation method:
(1) by dense for 360mL H2SO4The dense H with 40mL3PO4Join after mixing 3.0g graphite flake and
18.0g KMnO4Mixture in, be then heated to 50 DEG C stirring 12h, be poured into 400 after being cooled to room temperature
ML frozen water and hydrogen peroxide that 3mL mass fraction is 30% obtain mixed liquor；
(2) mixed liquor of step (1) metallic screen screens, and is then filtrated to get filtrate by polyester fiber,
To remove the graphite flake having neither part nor lot in reaction；
(3) by the filtrate of step (2) under 4000rpm rotating speed centrifugation 4h, by supernatant decant,
Remaining solid material is successively with the water of 200mL, the HCl/water solution and 200 of 200mL 30% mass fraction
The ethanol of mL washs 2 times, and after washing every time, mixture is all screened by metallic screen and filters with polyester fiber,
Supernatant is decanted, obtains solid material by filtrate centrifugation 4h under 4000rpm rotating speed；
(4) solid material of step (3) being added 200mL ether coagulation, the flocculate of generation passes through hole
0.45 μm of footpath PTFE film filters, and the solid matter of gained is at room temperature vacuum dried whole night, obtains Graphene
Oxide powder.
Embodiment 1
The preparation method of the three-diemsnional electrode brush that a kind of 3D graphene oxide aeroge of the present embodiment is modified, tool
Preparation step is as follows:
(1) taking graphene oxide powder deionized water to disperse, compound concentration is the stone of 1mg/mL
Then this dispersion liquid is put into that supersonic wave cleaning machine is ultrasonically treated makes it be uniformly dispersed by ink olefinic oxide dispersion liquid；
(2) it is totally submerged three-dimensional stainless steel brush in the graphene oxide dispersion liquid of step (1), put into
The ultrasonically treated 40min of supersonic wave cleaning machine, puts into baking oven after taking-up, be aged 24h, adhered at 60 DEG C
There is the stainless steel brush of three-dimensional of the graphene oxide hydrosol；
(3) the stainless steel brush of the three-dimensional being attached with the graphene oxide hydrosol obtaining step (2) is immediately
Putting into liquid nitrogen frozen 1h, then-40 DEG C of freeze-dryings are processed 3 days under vacuum conditions, and obtaining deposition has stone
Unnecessary aeroge is struck off by the stainless steel brush of three-dimensional of ink olefinic oxide aeroge, obtains the oxidation of 3D Graphene
The stainless steel brush of three-dimensional that thing aeroge is modified.
Embodiment 2
The preparation method of the three-diemsnional electrode brush that a kind of 3D graphene oxide aeroge of the present embodiment is modified, tool
Preparation step is as follows:
(1) taking graphene oxide powder deionized water to disperse, compound concentration is the stone of 3mg/mL
Then this dispersion liquid is put into that supersonic wave cleaning machine is ultrasonically treated makes it be uniformly dispersed by ink olefinic oxide dispersion liquid；
(2) it is totally submerged three-dimensional stainless steel brush in the graphene oxide dispersion liquid of step (1), put into
The ultrasonically treated 1h of supersonic wave cleaning machine, puts into baking oven after taking-up, be aged 24h, be attached with at 55 DEG C
The stainless steel brush of three-dimensional of the graphene oxide hydrosol；
(3) the stainless steel brush of the three-dimensional being attached with the graphene oxide hydrosol obtaining step (2) is immediately
Putting into liquid nitrogen frozen 90min, then-60 DEG C of freeze-dryings are processed 2 days under vacuum conditions, and obtaining deposition has
Unnecessary aeroge is struck off by the stainless steel brush of three-dimensional of graphene oxide aeroge, obtains 3D Graphene oxygen
The stainless steel brush of three-dimensional that compound aeroge is modified.
Embodiment 3
The preparation method of the three-diemsnional electrode brush that a kind of 3D graphene oxide aeroge of the present embodiment is modified, tool
Preparation step is as follows:
(1) taking graphene oxide powder deionized water to disperse, compound concentration is the stone of 5mg/mL
Then this dispersion liquid is put into that supersonic wave cleaning machine is ultrasonically treated makes it be uniformly dispersed by ink olefinic oxide dispersion liquid；
(2) it is totally submerged three-dimensional stainless steel brush in the graphene oxide dispersion liquid of step (1), put into
The ultrasonically treated 1h of supersonic wave cleaning machine, puts into baking oven after taking-up, be aged 20h, be attached with at 60 DEG C
The stainless steel brush of three-dimensional of the graphene oxide hydrosol；
(3) the stainless steel brush of the three-dimensional being attached with the graphene oxide hydrosol obtaining step (2) is immediately
Putting into liquid nitrogen frozen 1h, then freeze-drying is processed 3 days under vacuum conditions, and obtaining deposition has Graphene oxygen
Unnecessary aeroge is struck off by the stainless steel brush of three-dimensional of compound aeroge, obtains 3D graphene oxide airsetting
The stainless steel brush of three-dimensional that glue is modified.
The structural representation of the stainless steel brush of three-dimensional that the 3D graphene oxide aeroge of embodiment 1～3 is modified is such as
Shown in Fig. 1, it is as follows as effect assessment during anode of microbial fuel cell materials application:
Build microbiological fuel cell, as in figure 2 it is shown, described microbiological fuel cell is by battery filling opening the 1st,
Galvanic anode the 2nd, amberplex prepared by the three-diemsnional electrode brush that 3D graphene oxide aeroge is modified is the 3rd,
Pretreating graphite felt negative electrode the 4th, anode chamber's housing the 5th, cathode chamber housing the 6th, shell holder battery filling opening 7 groups
Becoming, the preparation method of described pretreating graphite felt negative electrode is as follows:
(1) graphite felt is put into the water-bath at 90 DEG C of the hydrogen peroxide solution of 10% mass concentration and boil 2h, then
Boil 2h with the water-bath at the same temperature of isopyknic deionized water, then use oven for drying；
(2) graphite felt is cut into long 4cm × wide 4cm size；
(3) by titanium silk, graphite felt is put on.
The concrete number of assembling steps of microbiological fuel cell is as follows:
(1) brush holder of the stainless steel brush of three-dimensional that the 3D graphene oxide aeroge obtaining embodiment is modified
Titanium silk is passed from anode casing aperture outward by interior, and modified anode plane is parallel with anode casing board plane；
(2) gluing titanium silk with anode casing aperture with AB glue, placing makes it solidify in about 5 minutes；
(3) the graphite felt negative electrode of pretreatment is loaded cathode chamber by above-mentioned same method, then ion is exchanged
Cathode shell, amberplex, on cathode chamber housing, are then fixed, finally by mould by anode casing
Screw on screw nut；
(4) potassium ferricyanide solution of 50mmol/L is joined in cathode chamber by negative electrode liquid filling hole, then use
Silica gel plug is stoppered；
(5) sodium lactate solution is joined in anode chamber that (in battery, sodium lactate solution is dense by anode liquid filling hole
Degree is 10mmol/L), add the pure bacterium of 2mL Xi Washi, be eventually adding the phosphate buffer solution of pH=8.0,
Recycle silicon plug is stoppered, and the operation of step (4) and (5) is all carried out on aseptic working platform.
Connect the resistance of 1000 Ω in the external circuit of microorganism fuel cell, run Microbial fuel electricity
Pond, connects data acquisition unit and is acquired data, and arranging and gathering data break is to gather once for 5 minutes.Treat
To cell voltage reach stable when, start battery success.By using intermittent cyclic method of testing (Fed-batch
Cycle Test Method) measured power density, respectively at the 1000th, the 500th, the 200th, the 100th, the 50th, 25 ohm
The burning voltage that a complete MFC intermittent cycle reaches maximum is recorded respectively, by embodiment under resistance
The stainless steel brush of three-dimensional that the 3D graphene oxide aeroge of 1～3 is modified (contrasts with the stainless steel brush of unmodified
Group) contrast, result is as it is shown on figure 3, as seen from Figure 3, by the 3D stone of embodiment 1～3 preparation
The peak power of the opposing cathode electrode projected area of the stainless steel brush anode that ink olefinic oxide aeroge is modified is close
Degree is respectively 182.7mW/m2、268.3mW/m2And 375.8mW/m2, the now stainless steel brush of unmodified
Anode maximum power density is only 21.5mW/m2, the 3D graphene oxide aeroge of embodiment 1～3 preparation
The three-dimensional stainless steel brush anode modified is 8.5 times, 12.5 times and 17.5 of not modified stainless steel brush anode respectively
Times.
The stainless steel brush of three-dimensional that the 3D graphene oxide aeroge of embodiment 1～3 is modified is as Microbial fuel
During battery anode material application, longtime running measures the stability of battery, and the different MFC of record changes liquid in difference
Maximum power density in circulation (anode chamber giving MFC changes base fluid, adds sodium lactate), and and unmodified
Stainless steel brush (contrast groups) contrast, result is as shown in Figure 4.As seen from Figure 4: at MFC
In front ten circulations bringing into operation, the three-dimensional stainless steel brush electrode that 3D graphene oxide aeroge is modified is electric
The power density in pond rises quickly, and rises in ensuing ten circulations and slow down, during to the 19th cycle
Power density is maximum.This is because MFC startup stage, in anode chamber, microorganism is in the growth stage,
Gradually adapting to MFC environment, fast breeding, so power density quickly improves.And biomembrane increases on anode
As the increase of circulation is gradually slowed down, until being molded completely on anode active surface, now anode activity is
Height, keeps stable subsequently.Find out 3D graphene oxide airsetting from the MFC performance of following 22 circulations
The three-dimensional stainless steel brush electrode cell power density that glue is modified is not decreased obviously, and has preferable stable circulation
Property.And the stainless steel brush electrode battery of unmodified constantly declines front ten circulation internal power density, protect subsequently
Hold relatively stable.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not by above-mentioned reality
Execute the restriction of example, the change made under other any Spirit Essence without departing from the present invention and principle, modification,
Substitute, combine, simplify, all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (4)
1. the three-diemsnional electrode brush of a 3D graphene oxide aeroge modification is at anode of microbial fuel cell
Application in material, it is characterised in that the three-diemsnional electrode brush that described 3D graphene oxide aeroge is modified passes through
Following method prepares:
(1) taking graphene oxide powder deionized water to disperse, compound concentration is 1～5mg/mL's
Then this dispersion liquid is put into that supersonic wave cleaning machine is ultrasonically treated makes it disperse all by graphene oxide dispersion liquid
Even；
(2) it is totally submerged three-diemsnional electrode brush in the graphene oxide dispersion liquid of step (1), put into super
Ultrasonically treated 40～the 80min of sound wave cleaning machine, puts into baking oven after taking-up, be aged 20～24h at 55～60 DEG C,
Obtain being attached with the three-diemsnional electrode brush of the graphene oxide hydrosol；
(3) the three-diemsnional electrode brush being attached with the graphene oxide hydrosol that step (2) obtains is put immediately
Entering liquid nitrogen frozen 60～90min, then-40～-60 DEG C of freeze-dryings are processed 2～3 days under vacuum conditions,
There is the three-diemsnional electrode brush of graphene oxide aeroge to deposition, unnecessary aeroge is struck off, obtains 3D stone
The three-diemsnional electrode brush that ink olefinic oxide aeroge is modified.
2. the three-diemsnional electrode brush that a kind of 3D graphene oxide aeroge according to claim 1 is modified exists
Application in anode of microbial fuel cell material, it is characterised in that: described three-diemsnional electrode brush is for titanium
The stainless steel brush of three-dimensional of skein silk line brush holder or three-dimensional graphite brush；The size of three-diemsnional electrode brush is a diameter of 2cm,
A length of 4cm, brush holder a size of diameter 3mm, a length of 3cm.
3. the three-diemsnional electrode brush that a kind of 3D graphene oxide aeroge according to claim 1 is modified
Application in anode of microbial fuel cell material, it is characterised in that: described three-diemsnional electrode brush is for passing through
The stainless steel brush of pretreatment, described preprocess method is: three-dimensional stainless steel brush is completely submerged in absolute ethyl alcohol
In, ultrasonic cleaning 30min removes the organic matter on stainless steel brush surface, with deionized water rinsing after taking-up, then
Submergence ultrasonic cleaning 30min in deionized water, pretreatment puts into 45 DEG C of dry for standby of baking oven after completing.
4. the three-diemsnional electrode brush that a kind of 3D graphene oxide aeroge according to claim 1 is modified
Application in anode of microbial fuel cell material, it is characterised in that: described graphene oxide powder
Prepared by following preparation method:
(1) by dense for 360mL H2SO4The dense H with 40mL3PO4Join after mixing 3.0g graphite flake and
18.0g KMnO4Mixture in, be then heated to 50 DEG C stirring 12h, be poured into 400 after being cooled to room temperature
In mL frozen water and hydrogen peroxide that 3mL mass fraction is 30%, obtain mixed liquor；
(2) mixed liquor of step (1) metallic screen is screened, be then filtrated to get filter by polyester fiber
Liquid, removes the graphite flake having neither part nor lot in reaction；
(3) by the filtrate of step (2) under 4000rpm rotating speed centrifugation 4h, by supernatant decant,
Remaining solid material is successively with the water of 200mL, the HCl/water solution and 200 of 200mL 30% mass fraction
The ethanol of mL washs 2 times, and after washing every time, mixture is all screened by metallic screen and filters with polyester fiber,
Supernatant is decanted, obtains solid material by filtrate centrifugation 4h under 4000rpm rotating speed；
(4) solid material of step (3) being added 200mL ether coagulation, the flocculate of generation passes through hole
0.45 μm of footpath PTFE film filters, and the solid matter of gained is at room temperature vacuum dried whole night, obtains Graphene
Oxide powder.
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| CN111029633B (en) * | 2019-11-15 | 2023-03-28 | 广东轻工职业技术学院 | Microbial fuel cell and preparation method and application thereof |
| CN111342055B (en) * | 2020-02-28 | 2022-07-22 | 江苏大学 | Bioactive graphene composite hydrogel electrode and preparation method and application thereof |
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| CN102153073A (en) * | 2011-03-16 | 2011-08-17 | 天津大学 | Self-assembly preparation method and application of solid/liquid interface of graphene oxide hydrogel |
| CN102334221A (en) * | 2008-12-30 | 2012-01-25 | 宾夕法尼亚州研究基金会 | Cathodes for microbial electrolysis cells and microbial fuel cells |
| CN102803135A (en) * | 2009-05-22 | 2012-11-28 | 威廉马歇莱思大学 | Highly Oxidized Graphene Oxide And Methods For Production Thereof |
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| CN102334221A (en) * | 2008-12-30 | 2012-01-25 | 宾夕法尼亚州研究基金会 | Cathodes for microbial electrolysis cells and microbial fuel cells |
| CN102803135A (en) * | 2009-05-22 | 2012-11-28 | 威廉马歇莱思大学 | Highly Oxidized Graphene Oxide And Methods For Production Thereof |
| CN102153073A (en) * | 2011-03-16 | 2011-08-17 | 天津大学 | Self-assembly preparation method and application of solid/liquid interface of graphene oxide hydrogel |
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