CN111081478A - Rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode and construction method thereof - Google Patents
Rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode and construction method thereof Download PDFInfo
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- QMKYBPDZANOJGF-UHFFFAOYSA-N benzene-1,3,5-tricarboxylic acid Chemical compound OC(=O)C1=CC(C(O)=O)=CC(C(O)=O)=C1 QMKYBPDZANOJGF-UHFFFAOYSA-N 0.000 title claims abstract description 98
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 239000002131 composite material Substances 0.000 title claims abstract description 59
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 44
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 43
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title claims abstract description 15
- 238000007790 scraping Methods 0.000 claims abstract description 19
- 238000001354 calcination Methods 0.000 claims abstract description 17
- 239000011521 glass Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 20
- 239000007864 aqueous solution Substances 0.000 claims description 18
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000003837 high-temperature calcination Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- JJWJFWRFHDYQCN-UHFFFAOYSA-J 2-(4-carboxypyridin-2-yl)pyridine-4-carboxylate;ruthenium(2+);tetrabutylazanium;dithiocyanate Chemical group [Ru+2].[S-]C#N.[S-]C#N.CCCC[N+](CCCC)(CCCC)CCCC.CCCC[N+](CCCC)(CCCC)CCCC.OC(=O)C1=CC=NC(C=2N=CC=C(C=2)C([O-])=O)=C1.OC(=O)C1=CC=NC(C=2N=CC=C(C=2)C([O-])=O)=C1 JJWJFWRFHDYQCN-UHFFFAOYSA-J 0.000 claims description 3
- OBOSXEWFRARQPU-UHFFFAOYSA-N 2-n,2-n-dimethylpyridine-2,5-diamine Chemical compound CN(C)C1=CC=C(N)C=N1 OBOSXEWFRARQPU-UHFFFAOYSA-N 0.000 claims description 3
- NNMXSTWQJRPBJZ-UHFFFAOYSA-K europium(iii) chloride Chemical compound Cl[Eu](Cl)Cl NNMXSTWQJRPBJZ-UHFFFAOYSA-K 0.000 claims description 3
- HDGGAKOVUDZYES-UHFFFAOYSA-K erbium(iii) chloride Chemical compound Cl[Er](Cl)Cl HDGGAKOVUDZYES-UHFFFAOYSA-K 0.000 claims description 2
- GFISHBQNVWAVFU-UHFFFAOYSA-K terbium(iii) chloride Chemical compound Cl[Tb](Cl)Cl GFISHBQNVWAVFU-UHFFFAOYSA-K 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 11
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004043 dyeing Methods 0.000 abstract 1
- 239000000975 dye Substances 0.000 description 18
- 230000001276 controlling effect Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 238000003917 TEM image Methods 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-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
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite light anode and a construction method thereof, and belongs to the field of composite light anodes and construction thereof. The invention aims to solve the technical problem that the photoelectric conversion efficiency of the existing photo-anode as a dye-sensitized solar cell is low. The preparation material of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode comprises Ln (BTC)/Y2O3:Ln3+Composite, TiO2And FTO conductive glass; the construction method comprises the following steps: preparing mixed sol; and (3) coating the mixed sol on the surface of FTO glass by scraping, calcining and dyeing. The preparation method of the composite photo-anode is simple and easy to operate, low in cost and low in production risk. The photoelectric conversion efficiency and stability of the cell are improved, and the industrial production can be effectively realized. The rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode prepared by the invention is used forIn a photoanode cell.
Description
Technical Field
The invention relates to a composite light anode and the construction field thereof.
Background
Dye-sensitized Solar Cells (DSSCs) are widely focused in the field of new energy resources and rapidly developed in the dual fields of theory and practice due to their green and environmental-friendly characteristics, low cost, simple and easy operation, and the like. Factors influencing the photoelectric performance of the dye-sensitized solar cell mainly include the structure of a photoanode material, the composition of an electrolyte, the performance of a counter electrode, dye absorption spectrum and the like. The dyes commonly used in the current system are N3, N719, C101, C103 and the like, the spectral absorption range of the dyes only accounts for about 45% of the solar spectrum, and partial photons cannot be effectively utilized by the cell due to the spectrum matching problem, so that the further improvement of the light conversion efficiency of the DSSCs is limited to a certain extent. The DSSCs light conversion efficiency is improved by preparing the efficient broad-spectrum absorption dye, microscopically regulating and controlling the structure and the composition of the semiconductor material, increasing the adsorption binding force between the dye and the photo-anode semiconductor material and increasing the electron transmission efficiency. The photoanode, as the most important component of the dye-sensitized solar cell, plays a role in loading a sensitizer and collecting and transmitting electrons, and has been a major breaking direction in the research field of the photoelectric conversion efficiency of DSSCs.
Disclosure of Invention
The invention provides a rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite light anode and a construction method thereof, aiming at solving the technical problem that the photoelectric conversion efficiency of the existing light anode as a dye-sensitized solar cell is low.
The preparation material of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode comprises Ln (BTC)/Y2O3:Ln3+Composite, TiO2And FTO conductive glass; wherein the FTO conductive glass is F-doped conductive glass; ln (BTC)/Y2O3:Ln3+Composite and TiO2The mass ratio of (A) to (B) is 1: 100-1000.
Ln(BTC)/Y2O3:Ln3+The preparation method of the compound comprises the following steps:
firstly, mixing and dissolving trimesic acid and N, N-dimethylformamide, and adding the mixture into a chloride aqueous solution to obtain a mixture;
secondly, carrying out solvent heat treatment on the mixture obtained in the first step, wherein the temperature of the solvent heat treatment is 60-100 ℃, the treatment time is 12-24 hours, then washing and centrifuging the mixture by using methanol, drying the precipitate obtained by centrifuging, and obtaining rare earth trimesic acid complex crystals, wherein the drying temperature is 60-80 ℃;
thirdly, placing the rare earth trimesic acid complex crystal obtained in the second step into a muffle furnace for high-temperature calcination at the temperature of 400-450 ℃ to obtain Ln (BTC)/Y2O3:Ln3+And (c) a complex.
The construction method of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode comprises the following steps:
A. ln (BTC)/Y2O3:Ln3+Composites with TiO2Mixing to obtain mixed sol;
B. and B, uniformly scraping the mixed sol obtained in the step A on the surface of the FTO glass by adopting a scraping method, then calcining, naturally cooling, scraping a layer of the mixed sol obtained in the step A by adopting the scraping method, calcining again, naturally cooling, then soaking in a dye, and washing with absolute ethyl alcohol to finish the construction method of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite light anode.
And C, drying the prefabricated composite photo-anode calcined in the step B for 25 hours before the dye is put into the prefabricated composite photo-anode at the temperature of 85 ℃ if the dye is stored for a period of time, and then carrying out the dye again.
The invention has the beneficial effects that:
according to the invention, the specific surface area of the semiconductor material is optimized, and the adsorption quantity of the dye is increased, so that the light capture capacity is improved, and the photoelectric performance is improved. The invention introduces the prepared inorganic-organic hybrid material into the traditional TiO2The light anode is doped with the rare earth element with special physical and chemical characteristics, the down-conversion luminescent material is introduced into the solar cell, the photocurrent and the light utilization rate are improved,the spectral absorption range is widened, and the cell efficiency is improved. And the down-conversion luminescence can reduce the influence of ultraviolet rays on dyes, reduce the consumption of redox couples and help the stability of the battery. Ln (BTC)/Y of the present invention2O3:Ln3+/TiO2The preparation of the composite photo-anode has simple and easy operation, low cost and lower production risk. The doping of the rare earth is beneficial to widening the photoresponse area of the photo-anode and reducing the influence of ultraviolet light on the dye; ln (BTC)/Y2O3:Ln3+The specific surface area of the compound is larger, and the adsorption of the photo-anode on dye molecules is further improved. The photoelectric conversion efficiency and stability of the cell are improved, and the industrial production can be effectively realized.
The photoelectric conversion efficiency of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode cell obtained by the method is verified to be higher than that of the traditional TiO composite photo-anode cell2The light anode cell is improved by 10.9%.
The rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite light anode prepared by the invention is used in a photo-anode cell.
Drawings
FIG. 1 shows Ln (BTC)/Y obtained in example one2O3:Ln3+Transmission electron micrographs of the composites;
FIG. 2 shows Ln (BTC)/Y obtained in example one2O3:Ln3+An XRD pattern of the composite;
FIG. 3 is a graph of photocurrent density-photovoltage of a dye-sensitized solar cell composed of the composite rare earth trimesic acid complex/yttrium oxide/titanium dioxide anode obtained in example one, where a represents the composite rare earth trimesic acid complex/yttrium oxide/titanium dioxide anode obtained in example one, and b represents conventional TiO2And a photo-anode.
Detailed Description
The technical solution of the present invention is not limited to the specific embodiments listed below, and includes any combination of the specific embodiments.
The first embodiment is as follows: this embodimentThe preparation material of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode comprises Ln (BTC)/Y2O3:Ln3+Composite, TiO2And FTO conductive glass; wherein the FTO conductive glass is F-doped conductive glass; ln (BTC)/Y2O3:Ln3+Composite and TiO2The mass ratio of (A) to (B) is 1: 100-1000.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: the surface resistance of the FTO conductive glass is 30 omega/cm2The length is 2cm, the width is 1.5cm, and the thickness is 3 mm. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: ln (BTC)/Y2O3:Ln3+The preparation method of the compound comprises the following steps:
firstly, mixing and dissolving trimesic acid and N, N-dimethylformamide, and adding the mixture into a chloride aqueous solution to obtain a mixture;
secondly, carrying out solvent heat treatment on the mixture obtained in the first step, wherein the temperature of the solvent heat treatment is 60-100 ℃, the treatment time is 12-24 hours, then washing and centrifuging the mixture by using methanol, drying the precipitate obtained by centrifuging, and obtaining rare earth trimesic acid complex crystals, wherein the drying temperature is 60-80 ℃;
thirdly, placing the rare earth trimesic acid complex crystal obtained in the second step into a muffle furnace for high-temperature calcination at the temperature of 400-450 ℃ to obtain Ln (BTC)/Y2O3:Ln3+And (c) a complex. The other is the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: in the first step, the chloride aqueous solution is one or a mixture of more of europium chloride aqueous solution, yttrium chloride aqueous solution, terbium chloride aqueous solution and erbium chloride aqueous solution, the concentration of the chloride aqueous solution is 0.05mol/L, and the ratio of the amount of chloride to trimesic acid in the chloride aqueous solution is 1: 1. The others are the same as in one of the first to third embodiments.
The fifth concrete implementation mode: the construction method of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode comprises the following steps:
A. ln (BTC)/Y2O3:Ln3+Composites with TiO2Mixing to obtain mixed sol;
B. and B, uniformly scraping the mixed sol obtained in the step A on the surface of the FTO glass by adopting a scraping method, then calcining, naturally cooling, scraping a layer of the mixed sol obtained in the step A by adopting the scraping method, calcining again, naturally cooling, then soaking in a dye, and washing with absolute ethyl alcohol to finish the construction method of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite light anode.
The sixth specific implementation mode: the fifth embodiment is different from the fifth embodiment in that: ln (BTC)/Y in step A2O3:Ln3+Composites with TiO2The mass ratio of (A) to (B) is 1: 100-1000. The rest is the same as the fifth embodiment.
The seventh embodiment: the fifth or sixth embodiment is different from the fifth or sixth embodiment in that: and B, blade-coating the mixed sol twice in the step B, wherein the thickness of the mixed sol is 5-10 mu m. The other is the same as the fifth or sixth embodiment.
The specific implementation mode is eight: the difference between this embodiment mode and one of the fifth to seventh embodiment modes is that: and in the step B, the thickness of the mixed sol obtained by blade coating twice is 8 mu m. The rest is the same as one of the fifth to seventh embodiments.
The specific implementation method nine: the present embodiment differs from the fifth to eighth embodiment in that: in the step B, the calcining temperature of the two times is 460 ℃, the calcining time is 40min, and the heating rate is 25 ℃/min. The rest is the same as the fifth to eighth embodiments.
The detailed implementation mode is ten: the present embodiment differs from one of the fifth to ninth embodiments in that: the dye in the step B is N719 dye, and the density of the dye is 4.0 multiplied by 10-4g/mL, and the soaking time is 75 h. The others are the same as in one of the fifth to ninth embodiments.
The following examples were used to demonstrate the beneficial effects of the present invention:
the first embodiment is as follows:
the method for constructing the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode in the embodiment specifically comprises the following steps:
A. ln (BTC)/Y2O3:Ln3+Composites and commercial TiO2(P25) mixing according to the mass ratio of 1: 1000 to obtain mixed sol;
B. uniformly scraping the mixed sol obtained in the step A on the surface of FTO glass by adopting a scraping method, wherein the thickness of the scraping mixed sol is 8 microns, then calcining the mixed sol in an air atmosphere, controlling the heating rate to be 25 ℃/min, the calcining temperature to be 460 ℃, the calcining time to be 40min, naturally cooling the mixed sol, scraping a layer of the mixed sol obtained in the step A by adopting the scraping method, controlling the thickness of the scraping mixed sol to be 8 microns, calcining the mixed sol again, controlling the heating rate to be 25 ℃/min, the calcining temperature to be 460 ℃, the calcining time to be 40min, naturally cooling the mixed sol, soaking the mixed sol in a dye for 75 hours, and washing the mixed sol with absolute ethyl alcohol to complete the construction method of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode.
The dye in the step B is N719 dye with the density of 4.0X 10-4g/mL。
Wherein Ln (BTC)/Y in step A2O3:Ln3+The preparation method of the compound comprises the following steps:
firstly, 0.0210g of trimesic acid and N, N-dimethylformamide are mixed and dissolved, and the mixture is added into a mixed aqueous solution of 0.06mmol of europium chloride and 0.94mmol of yttrium chloride to obtain a mixture; the mass ratio of the trimesic acid to the N, N-dimethylformamide is 1: 3600;
secondly, carrying out solvent heat treatment on the mixture obtained in the first step, wherein the temperature of the solvent heat treatment is 80 ℃, the treatment time is 20 hours, then washing and centrifuging the mixture by using methanol, and drying the precipitate obtained by centrifuging at the drying temperature of 70 ℃ to obtain rare earth trimesic acid complex crystals;
thirdly, placing the rare earth trimesic acid complex crystal obtained in the second step into a muffle furnace for high-temperature calcination at the high-temperature calcination temperature of 420 ℃ to prepare the rare earth trimesic acid complex crystalObtaining Ln (BTC)/Y2O3:Ln3+And (c) a complex.
Ln (BTC)/Y obtained in this example2O3:Ln3+A transmission electron micrograph of the composite is shown in FIG. 1; ln (BTC)/Y obtained in this example2O3:Ln3+The XRD pattern of the composite is shown in figure 2; a graph of photocurrent density-photovoltage of the dye-sensitized solar cell composed of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite light anode obtained in this embodiment is shown in fig. 3, where a represents the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite light anode obtained in this embodiment, and b represents the conventional TiO composite light anode2The photo-anode proves that the photoelectric conversion efficiency of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode cell obtained in the embodiment is higher than that of the conventional TiO composite photo-anode cell2The light anode cell is improved by 10.9%.
Claims (10)
1. The rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite light anode is characterized in that the preparation material of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite light anode comprises Ln (BTC)/Y2O3:Ln3+Composite, TiO2And FTO conductive glass; wherein the FTO conductive glass is F-doped conductive glass; ln (BTC)/Y2O3:Ln3+Composite and TiO2The mass ratio of (A) to (B) is 1: 100-1000.
2. The rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photoanode as claimed in claim 1, wherein the surface resistance of the FTO conductive glass is 30 Ω/cm2The length is 2cm, the width is 1.5cm, and the thickness is 3 mm.
3. The rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photoanode of claim 1, wherein Ln (BTC)/Y2O3:Ln3+The preparation method of the compound comprises the following steps:
firstly, mixing and dissolving trimesic acid and N, N-dimethylformamide, and adding the mixture into a chloride aqueous solution to obtain a mixture;
secondly, carrying out solvent heat treatment on the mixture obtained in the first step, wherein the temperature of the solvent heat treatment is 60-100 ℃, the treatment time is 12-24 hours, then washing and centrifuging the mixture by using methanol, drying the precipitate obtained by centrifuging, and obtaining rare earth trimesic acid complex crystals, wherein the drying temperature is 60-80 ℃;
thirdly, placing the rare earth trimesic acid complex crystal obtained in the second step into a muffle furnace for high-temperature calcination at the temperature of 400-450 ℃ to obtain Ln (BTC)/Y2O3:Ln3+And (c) a complex.
4. The rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photoanode according to claim 3, wherein the chloride aqueous solution in the first step is one or a mixture of more of a europium chloride aqueous solution, a yttrium chloride aqueous solution, a terbium chloride aqueous solution and an erbium chloride aqueous solution, the concentration of the chloride aqueous solution is 0.05mol/L, and the ratio of the amount of the chloride to the trimesic acid in the chloride aqueous solution is 1: 1.
5. The method for constructing the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode according to claim 1, which is characterized by comprising the following steps:
A. ln (BTC)/Y2O3:Ln3+Composites with TiO2Mixing to obtain mixed sol;
B. and B, uniformly scraping the mixed sol obtained in the step A on the surface of the FTO glass by adopting a scraping method, then calcining, naturally cooling, scraping a layer of the mixed sol obtained in the step A by adopting the scraping method, calcining again, naturally cooling, then soaking in a dye, and washing with absolute ethyl alcohol to finish the construction method of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite light anode.
6. According to the claimsThe construction method of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode is characterized in that Ln (BTC)/Y is adopted in the step A2O3:Ln3+Composites with TiO2The mass ratio of (A) to (B) is 1: 100-1000.
7. The construction method of the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode according to claim 5, wherein the thickness of the mixed sol obtained in step B is 5-10 μm.
8. The method for constructing the rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode according to claim 7, wherein the thickness of the mixed sol obtained by blade coating twice in step B is 8 μm.
9. The method for constructing a rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode according to claim 5, wherein the calcination temperature in step B is 460 ℃, the calcination time is 40min, and the heating rate is 25 ℃/min.
10. The method for constructing a rare earth trimesic acid complex/yttrium oxide/titanium dioxide composite photo-anode according to claim 5, wherein the dye in step B is N719 dye, and the density of the dye is 4.0 x 10-4g/mL, and the soaking time is 75 h.
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