CN103199290B - A kind of appositional pattern microbiological fuel cell of sunlight strengthening electrogenesis - Google Patents

A kind of appositional pattern microbiological fuel cell of sunlight strengthening electrogenesis Download PDF

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CN103199290B
CN103199290B CN201310082123.XA CN201310082123A CN103199290B CN 103199290 B CN103199290 B CN 103199290B CN 201310082123 A CN201310082123 A CN 201310082123A CN 103199290 B CN103199290 B CN 103199290B
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fuel cell
light
sensitive
strengthening
electrogenesis
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CN103199290A (en
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任月萍
陈阳
李秀芬
王新华
朱春燕
康军
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Jiangnan University
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Jiangnan University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

Abstract

The invention discloses the deposit microbiological fuel cell of a kind of sunlight strengthening electrogenesis, adopt light-sensitive material load electrode to be negative electrode, utilize the electrogenesis microbe in mud the organic matter degradation in riverbed sludge or municipal sludge to be produced electric energy for catalyst.Electronics is accelerated by the transmission of anode to negative electrode and the consumption at cathode surface thereof in the strong oxidizing property hole simultaneously utilizing solar radiation to produce, produce clean electric energy while promoting natural water polluted bed mud in-situ immobilization and municipal sludge minimizing, there is great actual application value.

Description

A kind of appositional pattern microbiological fuel cell of sunlight strengthening electrogenesis
Technical field
The invention belongs to new forms of energy and new material application technical field, be specifically related to utilize solar radiation for motive force, adopt the electricity generation ability of light-sensitive material load negative electrode enhancement microbiological fuel cell.
Background technology
Deposit microbiological fuel cell (SedimentMicrobialFuelCell, SMFC) be made up of the anode be embedded in anaerobic bottom mud and the negative electrode be suspended from aerobic water body, this special construction makes it be applicable to river, lake or ocean remedying sludge and solid waste process.Compare with ecological dredging technology with existing riverbed sludge in-situ treatment technology, SMFC technology can utilize naturally occurring microbe that organic substance exhaustive oxidation in bed mud is become CO 2and water, process environmental protection, non-secondary pollution.
SMFC, while carrying out in-situ sediment remediation, is also expected to, for the middle-size and small-size power consumer apparatus of water body such as sensor is powered, have broad application prospects.But SMFC current power output is lower, business-like requirement can't be met, therefore how improve the electricity generation performance of system, reduce its operating cost and naturally become this field problem demanding prompt solution.SMFC with the oxygen existed a large amount of in air for cathode terminal electron acceptor.Although oxygen has higher reduction potential, its reduction reaction at cathode surface (ORR) speed is comparatively slow, seriously limits the power output of SMFC.
In recent years, at cathode surface load ORR catalyst as Pt, CoTTMP and FePc etc. can significantly improve the power output of SMFC system.But, Pt catalyst fancy price can increase the cost of SMFC undoubtedly, limit its practical application, although transition metal macrocyclic compound CoTTMP and FePc also has ORR catalytic activity less stable, electrode performance constantly can be decayed along with the prolongation of running time.
Catalysis material is also known as photocatalyst, and under optical excitation, electronics transits to conduction band positions from valence band, forms light induced electron at conduction band, forms photohole in valence band.Light induced electron and hole are separated and move to material surface under internal electric field effect, and then on surface, redox reaction occur.Light induced electron enters circuit and passes to cathode terminal electron acceptor O on the one hand 2, convert solar energy into electrical energy; Photohole has strong oxidizing property on the other hand, can be oxidized cathodic region organic substance, and near keeping negative electrode, oxyty maintains higher level.The output voltage of final raising SMFC system and power density.Lu etc. (EnergyFuels, 2010,24:1184-1190) by there is the natural rutile powder load of photocatalytic activity at cathode surface, with O 2as cathode terminal electron acceptor, run two room MFC and find, the maximum power density of system is by 5.73W/m 3increase to 12.03W/m 3but current this light-sensitive cathode is not for strengthening the report of SMFC electrogenesis and Organic Matter In Sediments removal under solar radiation.
The SMFC of this solar radiation strengthening electrogenesis is particularly useful in natural water.While eutrophy in-situ sediment remediation, convert solar energy into electrical energy, and improve organic removal efficiency in SMFC antianode deposit.
Summary of the invention
The invention provides the deposit microbiological fuel cell of a kind of sunlight strengthening electrogenesis, its negative electrode adopts light-sensitive material load electrode.
The preparation method of SMFC light-sensitive cathode, mixes form slurry by light-sensitive material according to a certain percentage with conductive agent (active carbon, acetylene black, carbon fiber, carbon nano-tube, Ketjen black and Graphene) and binding agent (Nafion solution, PTFE emulsion and PVDF emulsion).This slurry is sprayed at equably on electrode base material (carbon paper, carbon cloth, carbon felt, active carbon fiber felt and graphite felt), forms SMFC light-sensitive cathode.
Concrete preparation process is as follows:
1) light-sensitive material is mixed in proportion with one or more conductive agents;
2) in said mixture, add the binding agent of certain volume and be uniformly mixed into slurry;
3) above-mentioned slurry sprayed equably or be coated on electrode base material;
4) dry under 40 ° of C in baking oven.
The mass ratio of described light-sensitive material and conductive agent is 1:0.05 ~ 1:1.
Described light-sensitive material comprises TiO 2, TiO 2-ZnO, TiO 2-W, BiVO 4, Bi 2wO 6or Cu 2one or more in O.
Described conductive agent is one or more in active carbon or acetylene black, carbon fiber, carbon nano-tube, Ketjen black or Graphene.
Described binding agent be in polytetrafluoroethylene (PTFE) emulsion, Kynoar (PVDF) emulsion or Nafion solution one or more.
The structure of appositional pattern microbiological fuel cell of the present invention comprises light-sensitive cathode, carbon paper, carbon cloth, carbon felt, active carbon fiber felt or graphite felt anode, electrode suppor, outer conductor and 100 ~ 1000 Ω external resistances.
Light-sensitive cathode appositional pattern microbiological fuel cell is placed in natural fluviolacustrine deposit thing or municipal sludge by the present invention, take solar radiation as motive force, excite the raw light induced electron of photosensitive material producing and hole, strong oxidizing property Hole oxidation cathodic region is organic, cathodic region dissolved oxygen is made to remain on higher concentration, light induced electron enters circuit and participates in ORR reaction on the other hand, thus the output voltage of strengthening appositional pattern microbiological fuel cell and power output.The present invention adopts light-sensitive cathode to strengthen appositional pattern microbiological fuel cell, while converting solar energy into electrical energy, promote the electricity generation ability of appositional pattern microbiological fuel cell and the removal efficiency to organic matter in fluviolacustrine deposit thing or municipal sludge thereof, there is great practical value.
Accompanying drawing explanation
Fig. 1 is the structural representation of the appositional pattern microbiological fuel cell of sunlight strengthening electrogenesis
Outer meeting resistance 1, light-sensitive cathode 2, electrode suppor 3, anode 4 and outer conductor 5.
Embodiment
Below in conjunction with shown in accompanying drawing, the present invention will be further described.
The appositional pattern microbiological fuel cell sunlight of sunlight strengthening of the present invention strengthens the structure of the appositional pattern microbiological fuel cell of electrogenesis as shown in Figure 1, outer meeting resistance 1, light-sensitive cathode 2, electrode suppor 3, anode 4 and outer conductor 5.Its electricity generation process is: added in hydrostatic column by the fluviolacustrine deposit thing of certain system and flooded anode, adds the PBS of certain volume or natural river, lake water as catholyte.Form mud moisture interface after leaving standstill, being anode region below water sludge interface, is more than cathodic region.
Anode region, the organic matter of microbe under anaerobic oxide deposition species, produces electronics, proton, CO 2or oxidation intermediates etc.Electronics transfers to negative electrode through external circuit.At cathode surface terminal electron acceptor O 2h is generated with electronics and proton reaction 2o.
The effect of light-sensitive material is, under solar radiation, light-sensitive material can produce light induced electron and hole, strong oxidizing property Hole oxidation cathodic region is organic, cathodic region dissolved oxygen is made to remain on higher concentration, light induced electron enters circuit and participates in ORR reaction on the other hand, thus the output voltage of strengthening appositional pattern microbiological fuel cell and power output.
Example 1
The preparation of photoactive electrode: the TiO taking certain mass respectively 2, TiO 2-ZnO and TiO 2-W mixes according to mass ratio 7:3 with acetylene black conductor, adds the PTFE emulsion of 60% of certain volume respectively, and adjustment concentration is 1.5mL/g.Mix rear being coated on equably respectively in graphite felt, stand-by after dry in 40 ° of C baking ovens.
The performance test of appositional pattern microbiological fuel cell
As shown in Figure 1, anode and cathode is placed on respectively on support and is placed in 2L hydrostatic column, connect outer conductor and 500 Ω extrernal resistances, priority adds 800mL lake bed sediment and 800mLpH is the PBS of 7.0, the obvious water sludge interface of static rear formation, connect circuit, the output voltage of record system.Blank negative electrode, TiO 2, TiO 2-ZnO and TiO 2the maximum output voltage of-W light-sensitive cathode system is respectively:
Example 2
The preparation of photoactive electrode: the BiVO taking certain mass respectively 4, Bi 2wO 6and Cu 2o mixes according to mass ratio 7:3 with acetylene black conductor, adds the PTFE emulsion of 60% of certain volume respectively, and adjustment concentration is 1.5mL/g.Mix rear being coated on equably respectively in graphite felt, stand-by after dry in 40 ° of C baking ovens.
The performance test of appositional pattern microbiological fuel cell
As shown in Figure 1, anode and cathode is placed on respectively on support and is placed in 2L hydrostatic column, connect outer conductor and 500 Ω extrernal resistances, priority adds 800mL lake bed sediment and 800mLpH is the PBS of 7.0, the obvious water sludge interface of static rear formation, connect circuit, the output voltage of record system.Blank negative electrode, TiO 2, TiO 2-ZnO and TiO 2the maximum output voltage of-W light-sensitive cathode system is respectively
Although the present invention discloses above embodiment; but it is also not used to limit the present invention, any person skilled in the art, not departing from spirit and scope of the invention; all can do various changes and modification, what therefore protection scope of the present invention should define with claims is as the criterion.

Claims (6)

1. the appositional pattern microbiological fuel cell of a sunlight strengthening electrogenesis, it is characterized in that negative electrode adopts light-sensitive material load electrode, take solar radiation as motive force, excite the raw light induced electron of photosensitive material producing and hole, strong oxidizing property Hole oxidation cathodic region is organic, make cathodic region dissolved oxygen remain on higher concentration, light induced electron enters circuit and participates in oxygen reduction reaction on the other hand, thus the output voltage of strengthening appositional pattern microbiological fuel cell and power output;
Described light-sensitive material is TiO 2, TiO 2-ZnO, TiO 2-W, BiVO 4, Bi 2wO 6or Cu 2o and combination thereof.
2. fuel cell according to claim 1, is characterized in that the carrying method of described negative electrode light-sensitive material is that the light-sensitive material prepared, conductive agent and binding agent mixed liquor are fixed on electrode base material surface.
3. fuel cell according to claim 2, is characterized in that described conductive agent is active carbon, acetylene black, carbon fiber, carbon nano-tube, Ketjen black or Graphene and combination thereof.
4. fuel cell according to claim 2, is characterized in that described binding agent is ptfe emulsion, Nafion solution or Kynoar solution and combination thereof.
5. fuel cell according to claim 2, is characterized in that described electrode base material is carbon paper, carbon cloth, carbon felt, active carbon fiber felt or graphite felt and combination thereof.
6. fuel cell according to claim 2, is characterized in that the mass ratio of described light-sensitive material and conductive agent is 1:0.05 ~ 1:1.
CN201310082123.XA 2013-03-14 2013-03-14 A kind of appositional pattern microbiological fuel cell of sunlight strengthening electrogenesis Expired - Fee Related CN103199290B (en)

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CN103771674B (en) * 2014-02-17 2015-07-29 河海大学 A kind of in-situ remediation method of polluted bed mud
CN104817190B (en) * 2015-04-13 2016-09-07 浙江工商大学 A kind of Bioelectrochemical device and the method that utilize solar energy fall dirt to produce hydrogen
CN105140551B (en) * 2015-07-29 2017-08-01 大连理工大学 A kind of PANI/BiVO4Composite photo-catalyst and microbiological fuel cell coupled system
CN105140550B (en) * 2015-07-29 2019-05-10 大连理工大学 A kind of photoelectrocatalysis for handling Recalcitrant chemicals and microbiological fuel cell coupled system
CN105110554B (en) * 2015-08-17 2017-12-22 大连理工大学 One kind coupling(Light)The system that nitrate nitrogen in water removal is removed in catalysis with MFC
CN105428663B (en) * 2015-12-14 2018-04-20 南京工业大学 One kind tool photocatalysis cooperative effect electrode of microbial fuel cell and its preparation method and application
CN106630429B (en) * 2016-12-29 2020-11-27 同济大学 Sewage in-situ treatment system based on bioelectrochemistry and photocatalysis and application
CN110867589A (en) * 2018-08-28 2020-03-06 中国海洋大学 High specific surface area graphene seabed sedimentary layer microbial fuel cell electrode
CN110451631A (en) * 2019-07-31 2019-11-15 安徽环境科技集团股份有限公司 A kind of method of enhanced biological electrochemical in-situ pollution waters restoration

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