CN105668711A - Sponge electrode for pollutant degradation as well as preparation and application thereof - Google Patents

Abstract

The invention discloses a sponge electrode for pollutant degradation as well as preparation and an application thereof. A preparation method comprises steps as follows: (1) Ag nano-wire powder and KNO3 are added to distilled water, subjected to ultrasonic dispersion and then stirred for 2-3 h, and a Ag nano-wire solution is prepared; MWNTs (multi-wall nanotubes) and a surfactant are added to the distilled water and subjected to ultrasonic dispersion, and an MWNT solution is prepared; (2) a sponge electrode plate is impregnated in the MWNT solution firstly and then subjected to electro-deposition in the Ag nano-wire solution; (3) an electrode obtained in the step (2) is impregnated with an ethanol solution of TiO2, and the sponge electrode loaded with Ag nano-wires, the MWNTs and TiO2 is prepared through drying. Modified nanotube materials, namely, the MWNTs, are fixed on the sponge electrode with an impregnation method, then the surface of the sponge electrode is loaded with the Ag nano-wires and TiO2 through electro-deposition, and pollutants are degraded with the photoelectrocatalysis technology.

Description

A kind of sponge electrode for contaminant degradation and preparation thereof and application

Technical field

The invention belongs to the electrode of degradation of contaminant and preparation thereof and application, be specifically related to a kind of sponge electrode for contaminant degradation and prepare and application.

Background technology

Along with economic fast development, water environment pollution is day by day serious, and ecological safety is caused harm by the pollutant of industrial wastewater discharge. Reduce and eliminate the discharge of industrial pollution source, reduce the amount of pollutant in water environment that enters, reduce its degree polluted and scope, be the emphasis of pollutant control in water environment. Therefore, research and develop efficient, economic combined pollution water process new technique and become the focus that whole world environmental worker is concerned about.

Such as, the Chinese invention patent application document that publication number is CN102603054A discloses a kind of method for treating water utilizing nanometer silver catalysis ozone, ozone is passed in the ozone contact reaction device fill sewage, add nanometer silver simultaneously, then when being kept stirring for, control reaction time is 5min-90min, namely completes and utilizes the water of nanometer silver catalysis ozone to process.

In recent years, nano silver material has good biocompatibility and excellent chemistry, electricity and electrocatalysis characteristic due to it, is widely used in catalyst modification. Owing to Ag nano wire has most advanced and sophisticated micro discharge effect compared to nanometer silver, contaminant degradation in electrochemical process can be improved.

In recent years, the method degradation of contaminant utilizing photoelectrocatalysis, ozone oxidation, activated carbon adsorption and chlorination is more and more studied. Photoelectrocatalysis, it is applicable to insoluble organic due to it and secondary pollution is less, all have broad application prospects in fields such as chemical industry, the energy and environment, as a kind of great future Pollutant Treatment technology and studied scholar is paid attention to, nano silver wire, CNT, titanium dioxide are respectively provided with special degradation capability, process particularly in organic pollution and have clear superiority.

Summary of the invention

The present invention provides a kind of sponge electrode for degradation of contaminant and preparation thereof and application, and preparation manipulation is simple, it is not necessary to special equipment and instrument and chemical reagent, and the electrode stability and the oxidability that prepare all significantly improve.

The preparation method of a kind of sponge electrode for degradation of contaminant, comprises the steps:

(1) Ag nano wire powder and electrolyte are added in distilled water, stir 2～3h after ultrasonic disperse, prepare Ag nanowire solution;Multi-walled carbon nano-tubes and surfactant being added in distilled water, ultrasonic disperse obtains multi-walled carbon nano-tubes solution;

(2) sponge is first infiltrated in described multi-walled carbon nano-tubes solution, then electro-deposition in Ag nanowire solution, obtain the electrode of loaded Ag nano wire and multi-walled carbon nano-tubes;

(3) by TiO₂Alcoholic solution be impregnated on step (2) the electrode obtained, dry and prepare loaded Ag nano wire, multi-walled carbon nano-tubes and TiO₂Sponge electrode.

Modified carbon nano tube tube material and MWNTs (multi-walled carbon nano-tubes) are fixed on sponge electrode by the method impregnated by the present invention, again through electro-deposition by Ag nano wire, TiO₂It is carried on sponge electrode surface, under photo-electrocatalytic technology, degradation of contaminant.

Dipping solution material therefor MWNTs has huge specific surface area, and (present invention says by the specific surface area of multi-walled carbon nano-tubes at 10-20m²In/g), superpower mechanical performance, high chemically and thermally stability and good conductive capability, be attached on backing material, improve the electric conductivity of electrode, and be porous material, it is easy to by Ag, TiO₂Load to MWNTs surface; Ag nano wire has good biocompatibility and excellent chemistry, electricity and electrocatalysis characteristic, and due to point discharge, improves contaminant degradation effect; TiO₂On electrochemical degraded basis, incorporate photocatalysis principle, analyze the optimum condition of organic pollution catalytic degradation, catalytic reaction is there is under visible light conditions, can improving the degradation rate of pollutant, photoelectrocatalysis is applicable to hardly degraded organic substance, and secondary pollution is less. TiO₂As the typical photocatalyst of one, under the irradiation of ultraviolet light, degradable organic pollutant has good stability and higher photocatalytic. Experiments show that, the degradation effect of pollutant is relevant with photochemical catalytic oxidation, even when high toxicity concentration, and TiO₂Also there is good degradation capability.

The basal electrode sheet of the present invention with cheap, adsorptivity is strong, plasticity is strong, reusable general sponge makes backing material, either directly through commercially available, the size of sponge electrode: 60mm × 18mm × 2mm, 2 sponges compare each condition setting, the another carbon felt relative analysis adding a piece of formed objects.

As preferably, in step (1), Ag nano wire powder adds in distilled water in 0.01～0.5g/L; Electrolyte is in the molten addition distilled water of 1～10g/L. Namely every liter of distilled water disperses 0.01～0.5gAg nano wire powder and 1～10g electrolyte. Electrolyte preferably employs KNO₃Or AgNO₃。

It is preferred that, every liter of distilled water disperses 0.01～0.1gAg nano wire powder and 9～10gKNO₃; Most preferably, every liter of distilled water disperses 0.05gAg nano wire powder and 10.11gKNO₃。

In step (1), Ag nanowire solution is now with the current, should not place of a specified duration, it is prevented that because of oxidation deactivation.

As preferably, in step (1), multi-walled carbon nano-tubes adds in distilled water in 1～10g/L; Surfactant is in the molten addition distilled water of 8～12g/L. Namely every liter of distilled water disperses 0.8～1.2gg multi-walled carbon nano-tubes and 8～12g surfactant.

It is preferred that, every liter of distilled water disperses dispersion 1g multi-walled carbon nano-tubes and 10g surfactant in 1～2g multi-walled carbon nano-tubes and every liter of distilled water of 8～12g surfactant.

As preferably, described surfactant is ten disulfobenzene sodium sulfonates.

As preferably, described Ag nano wire powder adopts bath oiling to prepare.

Bath oiling concrete operations are: put in there-necked flask by the ethylene glycol of 40mL, 320 μ L (4mmoL/L are added after heating 40min under 165 DEG C of constant temperature, 0.054g/moL)/ethylene glycol solution, the 114mmoL/LPVP/ ethylene glycol (1.265g/100mL) of 12mL, the AgNO of 12mL94mmoL/L it is sequentially added into after continuing heating 15min under 165 DEG C of conditions₃/ ethylene glycol (1.598g/100mL), lucifuge, react 1h, cool down under room temperature, the Ag solution of preparation is carried out ultrasonic agitation (more than 1100r/min) 30min, simultaneously with alkaline reagent (NaOH) in solution, regulate PH=2～5, after being added dropwise to complete, continue ultrasonic agitation 30min, obtain grey black suspension, sucking filtration, washes 3 times, and ethanol and acetone respectively add once, sucking filtration, 50～60 DEG C of vacuum dryings.

As preferably, in step (2), sponge electrode slice infiltrates 1～5 time in multi-walled carbon nano-tubes solution, often infiltrates and dries 1.5～2h after once under 60～80 DEG C of conditions, then carries out next step operation; Each infiltration time is 5～60min. More preferably, in step (2), sponge electrode slice infiltrates 3 times in multi-walled carbon nano-tubes solution, often infiltrates and dries 1.5～2h after once under 70 DEG C of conditions, then carries out next step operation; Each infiltration time is 20min. As preferably, in Ag nanowire solution, the time of electro-deposition is 5～30min; More preferably 15min. Electro-deposition voltage-0.2V. As preferably, TiO₂Alcoholic solution in TiO₂Concentration be 1～10g/L, more preferably 1g/L, ethanol is dehydrated alcohol.

As preferably, by TiO in step (3)₂Alcoholic solution impregnate 2～3 times on step (2) the electrode obtained, each dip time is 5～30min.

TiO₂Alcoholic solution homogeneous impregnation on electrode, by same method when infiltrate in multi-walled carbon nano-tubes solution with sponge electrode slice electrode dried after dipping every time and carries out next step again and operate.

In step (1), when preparation Ag nanowire solution and multi-walled carbon nano-tubes solution, the time of ultrasonic disperse is 30～45min.

Preparation method of the present invention all at room temperature carries out.

The present invention also provides for the sponge electrode that a kind of method prepared as described prepares.

The present invention also provides for a kind of application such as described sponge electrode in degradable organic pollutant.

The application of described photoelectrocatalysis is: with the sponge electrode of the present invention for anode, titanium sheet is negative electrode, electrolysis and degradation organic pollution, and methyl orange especially has obvious degradation effect.

Concrete, it is provided that a kind of device for processing organic polluting water, including reative cell, the top of described reative cell is with water inlet, and bottom is with outlet, it is characterised in that also include:

Being fixed on the baffle plate in described reative cell, described baffle plate will from top to bottom be divided into the reaction channel of several roundabout connections in described reative cell;

Being correspondingly arranged at the electrode pair in each reaction channel, the anode of described electrode centering is the plate electrode being made up of the sponge electrode of the present invention;

And connect the power supply of all electrodes pair.

The negative electrode of described electrode centering is Ti electrode, stainless steel electrode or the plate electrode being made up of photoelectrocatalysimaterial material.

Anode is sponge electrode, negative electrode can adopt the electrode materials such as sponge electrode, titanium plate, rustless steel, by the most advanced and sophisticated micro discharge effect such as the metal nanometer line in sponge anode and CNT, improves degradation effect, simultaneously in corona discharge pulse process, the ultraviolet luminous energy that electrode produces excites TiO₂Light-catalyzed reaction, it is achieved optoelectronic integration is reacted.

Described baffle plate is embedded with light source, when adopting common power, then can pass through setting-in light source in baffle plate and improve photocatalysis effect.

Described light source is the light source of uviol lamp or simulated solar irradiation, is uniformly distributed on baffle plate, and all light sources are all connected with described power supply.

Baffle plate embeds light source, it is provided that additional light source, with TiO₂Forming light-catalyzed reaction, the baffle plate in the present invention both can provide and separate reative cell, changes the effect flowed to, again can fixed light source, it is achieved photocatalysis.

Baffle plate is preferably arranged to three pieces, from top to bottom it is fixed on the inwall of reative cell, four reaction channels will be divided in reative cell, roundabout between four reaction channels connect into a circuitous channel, the entrance of this circuitous channel is corresponding with the water inlet of reactor top, and the outlet of this circuitous channel is corresponding with the outlet bottom reative cell.

Described power supply is high voltage pulse discharge plasma power supply or normal power supplies. Reactor adopts the board-like reaction formation of plate, thus forming impulse electric corona micro discharge, may be used without normal power supplies simultaneously, carrying out conventional photo catalytic reaction.

Also include the cistern being connected with described outlet and water inlet, between cistern and water inlet, be provided with water pump.

Treatment sewage stores and in cistern, adopt streamed continuously, by water pump, the pending liquid in cistern is drawn into reative cell top, current are made to obtain in the reaction chamber being fully contacted reaction by baffle effect, improve the response time, return in cistern by bottom water outlet, be circulated process.

Compared with prior art, there is advantages that

(1) present invention is on electrochemical degraded basis, incorporates photocatalysis principle, catalytic reaction occurs under visible light conditions, it is possible to improve the degradation rate of the organic pollutions such as methyl orange, and secondary pollution is less.

(2) present invention is without adding chemical treatments, without using filter membrane reverse-osmosis treated, only need to build simple and easy photoelectrocatalysidevice device in pending micro-polluted water, under energising and illumination condition, organic pollution will under electrode slice effect efficient degradation.

(3) preparation manipulation of the present invention is simple, it is not necessary to special equipment and instrument and chemical reagent.

(4) catabolite of the present invention is pollution-free, and zero harm, to environment and human body without negative effect.

(5) preparation technology environmental protection of the present invention, harmless to environment human body.

(6) apparatus of the present invention are simplified, are easy to implement, can efficient fast degradation pollutant, be greatly promoted water quality, it is ensured that environmental and human health impacts.

(7) present invention prepares electrode stability and oxidability are all significantly improved.

Accompanying drawing explanation

Fig. 1 is Ag nano thread structure SEM figure.

Fig. 2 is the sponge electrode SEM figure of load MWNTs, Ag nano wire.

Fig. 3 is the absorbance percentage curve after methyl orange (each 60min, totally 4 times) in optimal conditions repeatedly degraded.

Fig. 4 is the structural representation of sewage-treatment plant.

Fig. 5 is the structural representation of baffle plate.

Accompanying drawing labelling shown in Fig. 4 and Fig. 5 is as follows:

1-power supply 2-reative cell 3-reaction channel

4-negative electrode 5-anode 6-water inlet

7-baffle plate 8-water pump 9-cistern

10-outlet 11-light source

Detailed description of the invention

Below in conjunction with specific embodiment, the present invention is expanded on further. It should be understood that, these embodiments are merely to illustrate the present invention rather than restriction the scope of the present invention, additionally, after reading the present invention, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.

Embodiment 1

(1) preparation of Ag nanowire solution:

Bath oiling extracts Ag nano wire powder, then weighs 0.005gAg nano wire powder and 1.011gKNO₃It is dissolved in 100mL distilled water, ultrasonic 30～40min, stirs 2～3h, prepares;

Bath oiling concrete operations are: put in there-necked flask by the ethylene glycol of 40mL, 320 μ L (4mmoL/L are added after heating 40min under 165 DEG C of constant temperature, 0.054g/moL)/ethylene glycol solution, it is sequentially added into 12mL114mmoL/LPVP/ ethylene glycol (1.265g/100mL), the AgNO of 12mL94mmoL/L after continuing heating 15min under 165 DEG C of conditions₃/ ethylene glycol (1.598g/100mL), lucifuge, reaction 1h, cool down under room temperature, the Ag solution of preparation is carried out ultrasonic agitation (more than 1100r/min) 30min, simultaneously with alkaline reagent (NaOH) in solution, regulates PH=2～5, after being added dropwise to complete, continue ultrasonic agitation 30min, obtain grey black suspension, sucking filtration, wash 3 times, ethanol and acetone respectively add once, sucking filtration, 50～60 DEG C of vacuum dryings and get final product, Ag nano thread structure SEM schemes as it is shown in figure 1, Ag presents linear structure.

(2) preparation of MWNTs impregnating solution:

Weigh 0.2gMWNTs and 2g ten disulfobenzene sodium sulfonate to be dissolved in 200mL distilled water, ultrasonic 30-45min after preparing;

(3) Ag nano wire/TiO₂The optimization of/MWNTs sponge electrode:

By infiltration 5～60min, infiltration 1～5 time in MWNTs solution (0.1～10g/L) of sponge electrode slice, take out electrode electro-deposition 5～30min in Ag nanowire solution (0.01～0.5g/L), electrode often infiltrates once need to dry 1.5～2h afterwards under 70 DEG C of conditions, then carry out next step preparation process, obtain Ag nano wire/MWNTs sponge electrode. By P25TiO₂In alcoholic solution, ultrasonic 30min forms dispersion phase, and concentration is identical with carbon nanotube concentration, dispersed sample is impregnated on Ag nano wire/MWNTs sponge electrode, impregnates 2～3 times, each 5～30min, dries and prepares Ag nano wire/TiO₂/ MWNTs electrode.

Respectively InitE (V) :-0.2 is arranged for the parameter of the Amperometrici-tCurveParameters software of electro-deposition, SampleInterval (sec): 0.1, RunTime (sec): 900, QuietTime (sec): 0, ScalesduringRun:1, Sensitivity (A/V): 1.e-006.

Optimum preparation condition is namely: by sponge electrode slice (60mm × 18mm × 2mm) infiltration 3 times in MWNTs solution (1g/L), infiltrate 20min every time, electrode often infiltrates once need to dry 1.5～2h afterwards under 70 DEG C of conditions, then carry out next step preparation process, obtain Ag nano wire/MWNTs sponge electrode (as shown in Figure 2); Take out electrode electro-deposition 15min in Ag nanowire solution (0.5g/L), by P25TiO₂In ethanol solution, ultrasonic 30min forms dispersion phase, and concentration is identical with multi-walled carbon nano-tubes solution concentration, dispersed sample is impregnated on Ag nano wire/MWNTs sponge electrode, impregnates 2 times, each 20min, dries and prepares Ag nano wire/TiO₂/ MWNTs electrode, its SEM figure amplifying 100 times is similar to Fig. 2, can find TiO after amplification₂Granule.

Ag nano wire/the TiO prepared under this optimal conditions₂The SEM figure of/MWNTs electrode as in figure 2 it is shown, in the sponge electrode mesh structure the substantial amounts of material of load. Example 2 below adopts the Ag nano wire/MWNTs electrode under optimal conditions, and embodiment 3 electrode used therein is the Ag nano wire/TiO prepared under this optimal conditions₂/ MWNTs electrode.

Embodiment 2

The degraded of methyl orange:

The methyl orange powder of 0.01g is dissolved in 1000mL distilled water, and ultrasonic agitation 15～20min is completely dissolved to powder, obtains the orange-yellow stable methyl orange solution of 10mg/L.

Taking the methyl orange solution 100mL of above-mentioned 10mg/L in 100mL small beaker, make anode with the Ag nano wire under embodiment 1 optimal conditions/MWNTs sponge electrode, the titanium sheet of same size is used as negative electrode, is fixed by electrode cap with holes.

Connecting with wire immerses after yin, yang pole piece in small beaker, the position of regulating YIN and YANG electrode slice make the two contact area just to and the immersion depth of cathode sheets more than anode strip; Get out 4 little probe tubes and a 1mL liquid-transfering gun.

Access before power supply at device, take the sample (1mL) of first methyl orange solution after being placed on the beaker securing anodic-cathodic sheet on agitator to stir 1h with liquid-transfering gun, get rid of the loose porous sponge adsorption to methyl orange solution itself.

Together with agitator, device is accessed D.C. regulated power supply, opening power, and regulation voltage level is 20V, and every 20min takes a sample, obtains 4 samples altogether after degraded 1h, and the color change finally contrasting these 4 samples substantially judges degradation effect.

Often group sponge electrode slice does one group of parallel laboratory test.

In order to obtain conclusion more accurately, all of diluted sample to 4mL carrying out the mensuration of absorbance, often these data all to there being one group of concrete data, can be carried out plotted versus process (such as Fig. 3) by group electrode slice.

As can be seen from Figure 3 after degraded 1h, the absorbance of methyl orange solution significantly have dropped, it was shown that methyl orange is had significant Degradation by sponge electrode.

Embodiment 3

Take the methyl orange solution 100mL of 10mg/L in the anode chamber of dual chamber reactor, with the Ag nano wire/TiO under embodiment 1 optimal conditions₂/ MWNTs sponge electrode makes anode, and the titanium sheet of same size is used as negative electrode, is placed in cathode chamber, is fixed by electrode cap with holes.

Access before power supply at device, take the sample (1mL) of first methyl orange solution after being placed on the beaker securing anodic-cathodic sheet on agitator to stir 1h with liquid-transfering gun, get rid of the loose porous sponge adsorption to methyl orange solution itself.

Together with agitator, device is accessed D.C. regulated power supply, opening power, and regulation voltage level is 20V, and every 20min takes a sample, obtains 4 samples, ultimate analysis degradation effect altogether after degraded 1h. Carry out photoelectrocatalysis contrast test simultaneously, course of reaction carries out illumination, analyze degradation effect.

Often group sponge electrode slice does one group of parallel laboratory test.

In order to obtain conclusion more accurately, all of diluted sample to 4mL is carried out the mensuration of absorbance, often group electrode slice all can to there being one group of concrete data, it has been found that after electrochemical degradation 20min, methyl orange 100% is degradable, and photoelectric-synergetic degraded makes methyl orange degradation faster.

Embodiment 4

Being used in the reaction unit as shown in Fig. 4～Fig. 5 by electrode of the present invention, reaction unit includes power supply 1, reative cell 2, water pump 8 and cistern 9.

Reative cell 2 is normal cubic reative cell, and the top of reative cell arranges water inlet 6, and base plate arranges outlet 10, and outlet 10 is connected to cistern 9, and water inlet 6 is connected to cistern 9 by water pump.

Staggered fixing some baffle plates 7 on the inwall of reative cell both sides, baffle plate 7 is preferably arranged to 3～4 pieces, from top to bottom it is fixed on the inwall of reative cell, 4～5 reaction channels 3 being parallel to each other will be divided in reative cell, roundabout connection between all reaction channels, by the connection of water inlet to outlet in a circuitous channel in reative cell, the arrival end of this circuitous channel is corresponding with water inlet, and the water side of this circuitous channel is corresponding with outlet.

In each reaction channel 3, pair of electrodes is set, including negative electrode 5 and anode 4, negative electrode 5 and anode 4 are disposed as tabular, anode is the sponge electrode of preparation under embodiment 1 optimal conditions, negative electrode is that titanium plate, corrosion resistant plate or the material identical with anode are made, all anodes connect the positive pole of power supply 1, and all negative electrodes connect the negative pole of power supply 1.

Being embedded in light source 11 in baffle plate 7, light source 11 is the light source of uviol lamp or simulated solar irradiation, is uniformly distributed on baffle plate, and all light sources 11 are all connected with power supply 1 is powered by power supply 1, the connecting line between not shown light source and power supply.

Power supply 1 can adopt high voltage pulse discharge plasma power supply, it would however also be possible to employ normal power supplies.

Plant running mode is as follows:

Pending waste water adopts streamed continuously, by water pump 8, the pending liquid in cistern 9 is drawn into reative cell 2 top, makes current obtain being fully contacted reaction in reative cell 2 by baffle plate 7 effect, improve the response time, returned in cistern 9 by bottom water outlet, be circulated process. Power supply can adopt high voltage pulse discharge plasma power supply, adopts the board-like reaction formation of plate, thus forming impulse electric corona micro discharge.

Adopt the treatment conditions that embodiment 2,3 is identical, methyl orange 100% can be obtained and remove. The application experiment that this device processes waste water is adopted to supplement.

Claims (10)

1. the preparation method for the sponge electrode of degradation of contaminant, it is characterised in that comprise the steps:

(1) Ag nano wire powder and electrolyte are added in distilled water, stir 2～3h after ultrasonic disperse, prepare Ag nanowire solution; Multi-walled carbon nano-tubes and surfactant being added in distilled water, ultrasonic disperse obtains multi-walled carbon nano-tubes solution;

(2) sponge is first impregnated in described multi-walled carbon nano-tubes solution, then electro-deposition in Ag nanowire solution, obtain the electrode of loaded Ag nano wire and multi-walled carbon nano-tubes;

(3) by TiO₂Alcoholic solution be impregnated on step (2) the electrode obtained, dry and prepare loaded Ag nano wire, multi-walled carbon nano-tubes and TiO₂Sponge electrode.

2. preparation method according to claim 1, it is characterised in that in step (1), Ag nano wire powder adds in distilled water in 0.01～0.5g/L; Electrolyte counts in distilled water with 1～10g/L.

3. preparation method according to claim 1, it is characterised in that in step (1), multi-walled carbon nano-tubes adds in distilled water in 1～10g/L; Surfactant counts in distilled water with 8～12g/L.

4. preparation method according to claim 1, it is characterised in that in step (2), sponge electrode slice infiltrates 1～5 time in multi-walled carbon nano-tubes solution, often infiltrates and dries 1.5～2h after once under 60～80 DEG C of conditions, then carry out next step operation; Each infiltration time is 5～60min.

5. preparation method according to claim 1, it is characterised in that in Ag nanowire solution, the time of electro-deposition is 5～30min.

6. preparation method according to claim 1, it is characterised in that TiO₂Alcoholic solution in TiO₂Concentration be 1～10g/L, ethanol is dehydrated alcohol.

7. preparation method according to claim 1, it is characterised in that by TiO in step (3)₂Alcoholic solution impregnate 2～3 times on step (2) the electrode obtained, each dip time is 5～30min.

8. the sponge electrode that a preparation method as described in claim 1～7 any claim prepares.

9. a sponge electrode as claimed in claim 8 application in degradable organic pollutant.

10., for processing a device for organic polluting water, including reative cell, the top of described reative cell is with water inlet, and bottom is with outlet, it is characterised in that also include:

Being fixed on the baffle plate in described reative cell, described baffle plate will from top to bottom be divided into the reaction channel of several roundabout connections in described reative cell;

Being correspondingly arranged at the electrode pair in each reaction channel, the anode of described electrode centering is the plate electrode that sponge electrode described in claim 8 is made;

And connect the power supply of all electrodes pair.