CN109637814A - A method of dye-sensitized cell is prepared with titania nanotube array - Google Patents
A method of dye-sensitized cell is prepared with titania nanotube array Download PDFInfo
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- CN109637814A CN109637814A CN201811495443.7A CN201811495443A CN109637814A CN 109637814 A CN109637814 A CN 109637814A CN 201811495443 A CN201811495443 A CN 201811495443A CN 109637814 A CN109637814 A CN 109637814A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2027—Light-sensitive devices comprising an oxide semiconductor electrode
- H01G9/2031—Light-sensitive devices comprising an oxide semiconductor electrode comprising titanium oxide, e.g. TiO2
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/542—Dye sensitized solar cells
Abstract
The invention discloses a kind of methods for preparing dye-sensitized cell with titania nanotube array, this prepares the titania nanotube array of different pipe ranges, caliber with the anode oxidation method that HF and NaF electrolyte system is respectively adopted in the method that titania nanotube array prepares dye-sensitized cell, then dye-sensitized cell is prepared, since TiO2 nano-tube array has density high, the advantages that compound with regular structure is orderly, obtained dye-sensitized cell can substantially increase photoelectric properties and incident photon-to-electron conversion efficiency, enhance the scattering of photon and enhance the absorption of light.
Description
Technical field
The present invention relates to the technical fields more particularly to a kind of titanium oxide nanotubes battle array of the quick magnificent battery preparation technique of dyestuff
The method that column prepare dye-sensitized cell.
Background technique
Dye sensitized nano crystal solar cell mainly imitates photosynthesis principle, a kind of novel sun electricity developed
Pond, main advantage are: abundant raw materials, at low cost, technology is relatively easy, in large area industrialized production have compared with
Big advantage, at the same all raw material and production technology be all it is nontoxic, free of contamination, some materials it is available adequately return
It receives, has great importance to protection human environment.
Porous metal oxide film can not only adsorb a large amount of dye molecules, to guarantee that it is big that efficient light capture radio generates
Photogenerated charge is measured, the function of transmission photo-generated carrier is also acted as.Thus, it could be seen that it played in dye-sensitized solar cells to
Close important role.Up to the present, the porous TIO2 of Anatase is considered as the semiconductor film that optimum makees DSSC light anode
Membrane material, TIO2 are up to the present to prepare dye sensitization sun electricity as a kind of nontoxic, stable, cheap wide bandgap semiconductor
Pond (DSSC) light anode performance one of material the most excellent.Nano-tube array has bigger ratio than nano-powder, nanometer film
Surface area, higher surface property are expected to improve DSSC photoelectric conversion efficiency.
The major influence factors of DSSC photoelectric properties have: nanotube pipe range, nanotube caliber, TIO2 crystal form.TIO2 at present
The preparation method of nanotube has template, hydro-thermal method and anodizing.Template can prepare the controllable nanotube of caliber
Array, but the caliber of the TIO2 nano-tube array synthesized is big, thickness of pipe wall, specific surface area are small, is not easily recycled, and synthesis technology is complicated,
The scale of TIO2 nano-tube array is limited to the size of template, and goes easily to damage product when removing template.Hydrothermal synthesis
Method is although easy to operate, the lesser TIO2 nano-tube array of caliber can be made, but experiment condition is harsh, gained nano-tube array
Size and shape structure feature largely depend on the size and crystal phase of raw material TIO2 particle.Relative to first two method,
With not needing, template, preparation process are simple, low in cost, experimental condition is mild, nano-tube array is with large area for anodic oxidation
The advantages that oldered array form arrangement, product is convenient for recycling.
But the incident photon-to-electron conversion efficiency of TIO2 nano-tube array dye-sensitized solar cells is not also high at present, as one kind
Still there are many problems up for further studying for novel semiconductor film material.
Summary of the invention
The purpose of the invention is to overcome the above-mentioned prior art, a kind of titania nanotube array system is provided
The method of standby dye-sensitized cell, this with the method that titania nanotube array prepares dye-sensitized cell be respectively adopted HF and
The anode oxidation method of NaF electrolyte system prepares the titania nanotube array of different pipe ranges, caliber, then prepares dye
Expect sensitized cells, since TiO2 nano-tube array has many advantages, such as density height, compound with regular structure is orderly, obtained dye sensitization electricity
Pond can substantially increase photoelectric properties and incident photon-to-electron conversion efficiency, enhance the scattering of photon and enhance the absorption of light.
The technical solution adopted by the present invention to solve the technical problems is: a kind of to prepare dyestuff with titania nanotube array
The method of sensitized cells, includes the following steps:
(1) the pure titanium sheet of anode and cathode graphite flake are immersed electrolyzing hydrofluoric acid liquid mixture or sodium fluoride electrolyte mixture
In and under constant voltage conditions oxidation processes produce titania nanotube array；
(2) the pure titanium sheet of titania nanotube array is carried out heat treatment calcining at 500-750 DEG C；(3) N719 dyestuff
The N719 ethanol solution of 320-340mg/L is configured to dehydrated alcohol；
(4) the pure titanium sheet of titania nanotube array after heat treatment is put into N719 ethanol solution in light protected environment
Under be sensitized, sensitization time be 12 hours, temperature is room temperature；
(5) 0.1M KI and 0.05M I are configured2Electrolyte acetonitrile solution, the neck mouth bottle for holding acetonitrile solution is placed on
Ultrasound 30 minutes in ultrasonic wave, it is spare as electrolyte after completely dissolution；
(6) the nanometer TIO that will be sensitized2Electrode and electrode is encapsulated with AB glue, is filled between electrodes using siphonage
Enter the electrolyte solution prepared, dye-sensitized cell is made.
Further, the pure titanium sheet of the anode need to be pre-processed, and pretreatment includes the following steps:
(1) the pure titanium sheet for cutting 20mm × 40mm, polishes through abrasive paper for metallograph, successively with acetone, ethyl alcohol, deionized water ultrasound
Cleaning；
(2) pure titanium sheet polishing treatment 30s is made in the mixed solution then formed with hydrofluoric acid, concentrated nitric acid, deionized water
Pretreated pure titanium sheet, three kinds of liquor capacity ratios are 1:4:5.
Further, step (1) uses electrolyzing hydrofluoric acid liquid mixture for electrolyte, electrolyzing hydrofluoric acid liquid mixture by
0.5wt% hydrofluoric acid, 0.1wt% glacial acetic acid, 0.1wt% polyethylene glycol composition, glacial acetic acid are complexing agent, and polyethylene glycol is to stablize
Agent；The electrode spacing of anode and cathode is 3cm, and electrode immerses 3/4 or less liquid level of electrolyte；The oxidation of constant voltage condition are as follows:
Oxidation processes 3000s under the voltage environment of D.C. regulated power supply offer 20V.
Either, step (1) uses sodium fluoride electrolyte mixture for electrolyte, sodium fluoride electrolyte mixture by
0.5wt% sodium fluoride, 0.1wt% glacial acetic acid, 0.5wt sodium sulphate composition；The electrode spacing of anode and cathode is 3cm, electrode leaching
Enter 3/4 or less liquid level of electrolyte；The oxidation of constant voltage condition are as follows: aoxidized under the voltage environment of D.C. regulated power supply offer 20V
Handle 6h.
Further, the pure titanium sheet purity in the step (1) is 99.6%, with a thickness of 200 μm.
Further, the molecular weight of the polyvinyl alcohol is 20000.
Further, the caliber of the titania nanotube array is 50-70nm, pipe range 500-600nm.
The titania nanotube array film forming process is as follows: originally, titanium surface quickly forms fine and close oxidation film, oxidation
The generation of film carries out simultaneously with dissolution, and early period, generating rate was faster than rate of dissolution, and the double electrical layers of Cathode/Solution Interface are (tight
Close layer/dispersion layer), make oxidation film Surface Creation aperture, adjacent aperture integrates increasing hole, then forms tubule,
Tubule further incorporates bigger pipe, and after aperture reaches maximum, nanotube pipe range also will continue to increase, into stablizing growth step
Section.Ultimately form the orderly high density film of Nano tube array of compound with regular structure.
Nanocrystalline porous film is the core of DSSC, and performance directly influences the photoelectric conversion efficiency of DSSC: one
Aspect it need adsorpting dye molecule；The excitation state electronics transfer of another aspect dye molecule is to film conduction band, then is transferred to outer
Circuit.Nanocrystalline TIO2The micro-structure of membrane electrode specifically include that particle size, shape, crystal form, porosity, surface roughness,
Specific surface area etc..The characteristics such as their strong lighting efficiency, light scattering property, electron transports for influencing battery, to influence battery
Incident photon-to-electron conversion efficiency.Generally have the characteristics that following: big specific surface area and Rough factor, to absorb more dyes
Material increases photoelectric current；It is connected with each other between nano particle, constitutes spongelike structure, make have good electrical contact between nanocrystalline,
Electronics has faster transmission rate in the film, to reduce the compound of carrier and electrolyte；Oxidation-reduction pair can seep
Entire nano crystal semiconductor electrode is arrived thoroughly, regenerates the dye molecule being oxidized effectively；The mode of absorption dyestuff guarantees
Electronics is effectively injected film conduction band, so that the Charge transfer on interface between nano crystal semiconductor and the dye molecule of its absorption is
Quickly and effectively；Back bias voltage is applied to electrode, Guinier-Preston zone can be formed in nanocrystal surface, low-doped semiconductor comes for originally seeking peace
It says, under the action of positive bias, depletion layer cannot be formed.
In conclusion the method for the invention for preparing dye-sensitized cell with titania nanotube array be respectively adopted HF and
The anode oxidation method of NaF electrolyte system prepares the titania nanotube array of different pipe ranges, caliber, then prepares dye
Expect sensitized cells, since TiO2 nano-tube array has many advantages, such as density height, compound with regular structure is orderly, obtained dye sensitization electricity
Pond can substantially increase photoelectric properties and incident photon-to-electron conversion efficiency, enhance the scattering of photon and enhance the absorption of light.
Detailed description of the invention
Fig. 1 is pure titanium anode oxidation process current versus time curve figure in a solution of hydrofluoric acid；
Fig. 2 is the SEM figure that pure titanium oxidation film after aoxidizing 30s is in a stage in Fig. 1；
Fig. 3 is the SEM figure that pure titanium oxidation film after aoxidizing 300s is in b-stage in Fig. 1；
Fig. 4 is the SEM figure that pure titanium oxidation film after aoxidizing 600s is in the c stage in Fig. 1；
Fig. 5 is the SEM figure that pure titanium oxidation film after aoxidizing 1000s is in the d stage in Fig. 1；
Fig. 6 is that pure titanium oxidation film after aoxidizing 1200s is in the side in d stage and surface SEM figure in Fig. 1；
Fig. 7 is that pure titanium oxidation film after aoxidizing 1600s is in the side in d stage and surface SEM figure in Fig. 1；
Fig. 8 is that pure titanium oxidation film after aoxidizing 2200s is in the side in d stage and surface SEM figure in Fig. 1；
Fig. 9 is that pure titanium oxidation film after aoxidizing 3000s is in the side in d stage and surface SEM figure in Fig. 1；
Figure 10 is the TiO in anode oxidation process2Nanometer pipe range-time plot；
Figure 11 is metal/solution interface double electrical layers figure.
Specific embodiment
Embodiment 1
A kind of method preparing dye-sensitized cell with titania nanotube array described in the present embodiment 1, including such as
Lower step:
(1) in the pure titanium sheet of anode and cathode graphite flake immersion electrolyzing hydrofluoric acid liquid mixture and under constant voltage conditions
Oxidation processes produce titania nanotube array；
(2) the pure titanium sheet of titania nanotube array is carried out heat treatment calcining at 500-750 DEG C；(3) N719 dyestuff
The N719 ethanol solution of 320-340mg/L is configured to dehydrated alcohol；
(4) the pure titanium sheet of titania nanotube array after heat treatment is put into N719 ethanol solution in light protected environment
Under be sensitized, sensitization time be 12 hours, temperature is room temperature；
(5) 0.1M KI and 0.05M I are configured2Electrolyte acetonitrile solution, the neck mouth bottle for holding acetonitrile solution is placed on
Ultrasound 30 minutes in ultrasonic wave, it is spare as electrolyte after completely dissolution；
(6) it is encapsulated by the nanometer TIO2 electrode being sensitized and to electrode with AB glue, is filled between electrodes using siphonage
Enter the electrolyte solution prepared, dye-sensitized cell is made.
In the present embodiment, the pure titanium sheet of the anode need to be pre-processed, and pretreatment includes the following steps:
(1) the pure titanium sheet for cutting 20mm × 40mm, polishes through abrasive paper for metallograph, successively with acetone, ethyl alcohol, deionized water ultrasound
Cleaning；
(2) pure titanium sheet polishing treatment 30s is made in the mixed solution then formed with hydrofluoric acid, concentrated nitric acid, deionized water
Pretreated pure titanium sheet, three kinds of liquor capacity ratios are 1:4:5.
In the present embodiment, use electrolyzing hydrofluoric acid liquid mixture for electrolyte, electrolyzing hydrofluoric acid liquid mixture by
0.5wt% hydrofluoric acid, 0.1wt% glacial acetic acid, 0.1wt% polyethylene glycol composition, glacial acetic acid are complexing agent, and polyethylene glycol is to stablize
Agent；The electrode spacing of anode and cathode is 3cm, and electrode immerses 3/4 or less liquid level of electrolyte；The oxidation of constant voltage condition are as follows:
Oxidation processes 3000s under the voltage environment of D.C. regulated power supply offer 20V.
In the present embodiment, the pure titanium sheet purity in the step (1) is 99.6%, with a thickness of 200 μm.
In the present embodiment, the molecular weight of the polyvinyl alcohol is 20000.
In the present embodiment, the caliber of the titania nanotube array is 50-70nm, pipe range 500-600nm.
Embodiment 2
The present embodiment 2 is to be changed on the basis of embodiment 1, is specifically replaced using sodium fluoride electrolyte mixture
Electrolyzing hydrofluoric acid liquid mixture is specific as follows as electrolyte:
Use sodium fluoride electrolyte mixture for electrolyte, sodium fluoride electrolyte mixture by 0.5wt% sodium fluoride,
0.1wt% glacial acetic acid, 0.5wt sodium sulphate composition；The electrode spacing of anode and cathode is 3cm, and electrode immerses liquid level of electrolyte 3/4
Below；The oxidation of constant voltage condition are as follows: oxidation processes 6h under the voltage environment of D.C. regulated power supply offer 20V.
The titania nanotube array film forming process is as follows: originally, titanium surface quickly forms fine and close oxidation film, oxidation
The generation of film carries out simultaneously with dissolution, and early period, generating rate was faster than rate of dissolution, and the double electrical layers of Cathode/Solution Interface are (tight
Close layer/dispersion layer), make oxidation film Surface Creation aperture, adjacent aperture integrates increasing hole, then forms tubule,
Tubule further incorporates bigger pipe, and after aperture reaches maximum, nanotube pipe range also will continue to increase, into stablizing growth step
Section.Ultimately form the orderly high density film of Nano tube array of compound with regular structure.
Nanocrystalline porous film is the core of DSSC, and performance directly influences the photoelectric conversion efficiency of DSSC: one
Aspect it need adsorpting dye molecule；The excitation state electronics transfer of another aspect dye molecule is to film conduction band, then is transferred to outer
Circuit.Nanocrystalline TIO2The micro-structure of membrane electrode specifically include that particle size, shape, crystal form, porosity, surface roughness,
Specific surface area etc..The characteristics such as their strong lighting efficiency, light scattering property, electron transports for influencing battery, to influence battery
Incident photon-to-electron conversion efficiency.Generally have the characteristics that following: big specific surface area and Rough factor, to absorb more dyes
Material increases photoelectric current；It is connected with each other between nano particle, constitutes spongelike structure, make have good electrical contact between nanocrystalline,
Electronics has faster transmission rate in the film, to reduce the compound of carrier and electrolyte；Oxidation-reduction pair can seep
Entire nano crystal semiconductor electrode is arrived thoroughly, regenerates the dye molecule being oxidized effectively；The mode of absorption dyestuff guarantees
Electronics is effectively injected film conduction band, so that the Charge transfer on interface between nano crystal semiconductor and the dye molecule of its absorption is
Quickly and effectively；Back bias voltage is applied to electrode, Guinier-Preston zone can be formed in nanocrystal surface, low-doped semiconductor comes for originally seeking peace
It says, under the action of positive bias, depletion layer cannot be formed.
Fig. 1 is pure titanium anode oxidation process current versus time curve figure in a solution of hydrofluoric acid, is had from the I-t curve of Fig. 1
Four Main Stages, the characteristics of reflecting oxide growth: a stage indicates one layer of fine and close high resistance of titanium Surface Creation after being powered
The barrier layer oxidation film of value；The rising of b-stage electric current is the generation due to oxidation film surface micropore, and constantly fusion generation is bigger
Hole, caused by the decline of titanium oxide resistance；The rising of c stage current slows down, and belongs to nanotube caliber fusing stage, d stage current size
It is held essentially constant, belongs to film of Nano tube array steady growth developing stage.Thin film of titanium oxide is colorless and transparent substance, when titanium table
When face generates after oxidation film illumination on the surface under anodic oxidation condition, the light being reflected back from titania surface can be with transmission
Film reaches the reflected light rays encounter interference effect again of titanium-based bottom surface, so that the titanium surface being oxidized be made to show interference
Color.In anode oxidation process early period, oxidation film generating rate is greater than rate of dissolution, and oxide thickness is continuously increased, different thick
The oxidation film layer of degree has an impact the refraction and reflection of luminous flux, light, and different colors is formed by interference effect.?
There is the change procedure of purple-blue-yellow-reddish brown (optical wavelength is sequentially increased) in 30s -300s period oxidation film color,
Titanium oxide nanotubes have been formed when 800s, and film surface appearance has very big change at this time, mainly based on the diffusing reflection of light,
Color is silver gray, and the color of period hereafter, titanium surface are held essentially constant.
The current versus time curve figure of comparative diagram 1, Fig. 2 are in the current versus time curve a stage, and titanium surface is quickly generated densification
Oxidation film；Fig. 3 is in current versus time curve b-stage initial stage, and micropore occurs in oxidation film surface；Fig. 4 is in current-vs-time song
Line c stage, titanium oxide nanotubes have been formed, and adjacent tubule incorporates mutually other side, gradually form stable big pipe.At Fig. 5
In the current versus time curve c later period in stage, the fusion process of nanotube terminates substantially.
For the d stage (pipe range developing stage) for preferably analyzing current versus time curve figure, the nanotube formed to the d stage
Array films have carried out surface and side Shape measure.Fig. 6, Fig. 7, Fig. 8 and Fig. 9 are in 0.5wt%HF+ glacial acetic acid+poly- second respectively
The SEM figure of the side and surface of oxidation film after 1200s, 1600s, 2200s, 3000s is aoxidized in glycol solution respectively.
In Fig. 6, Fig. 7, Fig. 8 and Fig. 9 in corresponding four times chosen, nanometer pipe diameter size is basicly stable, explanation
The d stage starts nanotube caliber and has basically reached maximum on current versus time curve figure, and the fusing stage of tubule is completed.?
In the length variation of film of Nano tube array, four time points upper length be respectively as follows: 240.1nm, 341.7nm, 435.1nm,
521.1nm, as Figure 10 anode oxidation process in TiO2Nanometer pipe range-time plot, it can be seen that with the progress of time
Pipe range increases, and generating rate is in reduction trend.
The reaction that pure titanium sheet occurs in anode oxidation process is mainly made of following two step:
Ti+2H2O-4e→TiO2+4H+ (1)
TiO2+6F-+4H+→[TiF6]2-+2H2O (2)。
As shown in Figure 11, in Cathode/Solution Interface, there is two kinds of interphase interactions: one is electrodes and solution two
Electrostatic interaction caused by residual charge in phase；Another kind is that various particles in electrode and solution are (ion, solute molecule, molten
Agent molecule etc.) between short distance effect, such as Characteristic Adsorption, dipole orientations arrangement, it is only in several nanometers of zero point of distance
Interior generation.Two kinds of interphase interactions make Cathode/Solution Interface, and there is double electrical layers, due to free electron in metal phase
Concentration is very big, it is believed that whole residual charges are all tight distributions in metal, constitute close layer；In solution side, due to solution
Concentration is smaller, constitutes dispersion layer under electrostatic interaction and the effect of the contradiction of particle warm-up movement.
The spacing very little of two charge layers of Cathode/Solution Interface, field strength is very big, and titanium surface is made to be quickly generated fine and close oxygen
Change film, since solution interface is dispersion layer, causing oxidation film, there are non-uniform generations on Nano grade, and titanium oxide is non-
Crystalline state, thin film of titanium oxide can have many defects in generating process, with the increase of oxide thickness, thin film of titanium oxide two
The voltage of end load increases, and after voltage reaches certain value, random breakdown occurs for the oxidation film of existing defects, generates aperture.With
The generation of aperture, electric current have rising by a small margin, constantly there are the generation and dissolution on new barrier layer, adjacent aperture collection in this stage
At increasing hole, tubule is then formed, tubule further incorporates bigger pipe, until caliber increases to maximum, mechanics knot
Structure is stablized, and becomes smaller in the fusing stage electric current ascensional range of pipe, concentration, the anodic oxidation voltage of the final size of caliber and electrolyte
It is related.After caliber increases to maximum, pipe range is in stable build phase, as barrier layer generating rate reaches with rate of dissolution
Balance, ultimately forms the orderly high density film of Nano tube array of compound with regular structure, length about 500-600nm.
The above described is only a preferred embodiment of the present invention, not making any form to technical solution of the present invention
On limitation.According to the technical essence of the invention any simple modification to the above embodiments, equivalent variations and repair
Decorations, in the range of still falling within technical solution of the present invention.
Claims (7)
1. a kind of method for preparing dye-sensitized cell with titania nanotube array, which comprises the steps of:
(1) the pure titanium sheet of anode and cathode graphite flake are immersed in electrolyzing hydrofluoric acid liquid mixture or sodium fluoride electrolyte mixture simultaneously
Oxidation processes produce titania nanotube array under constant voltage conditions；
(2) the pure titanium sheet of titania nanotube array is carried out heat treatment calcining at 500-750 DEG C；
(3) N719 dyestuff and dehydrated alcohol are configured to the N719 ethanol solution of 320-340mg/L；
(4) by the pure titanium sheet of titania nanotube array after heat treatment be put into N719 ethanol solution under light protected environment into
Row sensitization, sensitization time are 12 hours, and temperature is room temperature；
(5) 0.1M KI and 0.05M I are configured2Electrolyte acetonitrile solution, the neck mouth bottle for holding acetonitrile solution is placed on ultrasound
Ultrasound 30 minutes in wave, it is spare as electrolyte after completely dissolution；
(6) the nanometer TIO that will be sensitized2Electrode and electrode is encapsulated with AB glue, is poured into and prepared between electrodes using siphonage
Electrolyte solution, be made dye-sensitized cell.
2. a kind of method for preparing dye-sensitized cell with titania nanotube array according to claim 1, feature
It is, the pure titanium sheet of the anode need to be pre-processed, and pretreatment includes the following steps:
(1) the pure titanium sheet for cutting 20mm × 40mm, polishes through abrasive paper for metallograph, successively clear with acetone, ethyl alcohol, deionized water ultrasound
It washes；
(2) pre- place is made to pure titanium sheet polishing treatment 30s in the mixed solution then formed with hydrofluoric acid, concentrated nitric acid, deionized water
The pure titanium sheet of reason, three kinds of liquor capacity ratios are 1:4:5.
3. a kind of method for preparing dye-sensitized cell with titania nanotube array according to claim 1, feature
Be, step (1) uses electrolyzing hydrofluoric acid liquid mixture for electrolyte, electrolyzing hydrofluoric acid liquid mixture by 0.5wt% hydrofluoric acid,
0.1wt% glacial acetic acid, 0.1wt% polyethylene glycol composition, glacial acetic acid is complexing agent, and polyethylene glycol is stabilizer；Anode and cathode
Electrode spacing be 3cm, electrode immerse 3/4 or less liquid level of electrolyte；The oxidation of constant voltage condition are as follows: D.C. regulated power supply mentions
For oxidation processes 3000s under the voltage environment of 20V.
4. a kind of method for preparing dye-sensitized cell with titania nanotube array according to claim 1, feature
Be, step (1) uses sodium fluoride electrolyte mixture for electrolyte, sodium fluoride electrolyte mixture by 0.5wt% sodium fluoride,
0.1wt% glacial acetic acid, 0.5wt sodium sulphate composition；The electrode spacing of anode and cathode is 3cm, and electrode immerses liquid level of electrolyte 3/4
Below；The oxidation of constant voltage condition are as follows: oxidation processes 6h under the voltage environment of D.C. regulated power supply offer 20V.
5. a kind of method for preparing dye-sensitized cell with titania nanotube array according to claim 1, feature
It is, the pure titanium sheet purity in the step (1) is 99.6%, with a thickness of 200 μm.
6. a kind of method for preparing dye-sensitized cell with titania nanotube array according to claim 2, feature
It is, the molecular weight of the polyvinyl alcohol is 20000.
7. a kind of method for preparing dye-sensitized cell with titania nanotube array according to claim 1, feature
It is, the caliber of the titania nanotube array is 50-70nm, pipe range 500-600nm.
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