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Fe2-xTixO3/FTO photo-anode preparing technology and treatment method capable of improving photocurrent density of photo-anode

A fe2-xtixo3, photocurrent density technology, applied in the direction of electrodes, electrolytic components, electrolytic process, etc., can solve the problem of low photocurrent density of Fe2O3 photoanode, achieve the effect of low energy consumption and improved efficiency

Inactive Publication Date: 2017-05-17
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the Fe2O3 photoanode prepared in the prior art has a low photocurrent density and cannot produce oxygen efficiently by photolysis of water, the present invention has carried out in-depth research on the mechanism of oxygen production by photolysis of water. After a lot of original labor , and then completed the present invention

Method used

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  • Fe2-xTixO3/FTO photo-anode preparing technology and treatment method capable of improving photocurrent density of photo-anode
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  • Fe2-xTixO3/FTO photo-anode preparing technology and treatment method capable of improving photocurrent density of photo-anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Add 100 milliliters of deionized water to a beaker containing 4.0545 grams of ferric chloride (purity ≥ 99.0%) and 8.4992 grams of sodium nitrate (purity ≥ 99.5%) solid particles, and stir until completely dissolved;

[0027] (2) Put the FTO sheet that has been cut to a certain area into water for ultrasonic cleaning for 30 minutes, then put it into ethanol for ultrasonic cleaning for 30 minutes, then put it into acetone solvent for ultrasonic cleaning for 30 minutes, and finally blow dry the cleaned film with high-purity nitrogen. FTO film;

[0028] (3) Get 35 milliliters of the solution in the step (1) and add it to a 50 milliliter polytetrafluoroethylene reaction kettle with a stainless steel substrate, then put the FTO sheet cleaned in the step (2) into the above-mentioned reaction kettle , where the conductive surface of the FTO conductive glass sheet faces down and leans against the wall of the reactor at 45 degrees;

[0029] (4) Transfer the reaction kettle ...

Embodiment 2

[0032] (1) Steps (1) to (5) are the same as in Example 1;

[0033](6) Air (air)-Fe2O3 / FTO sheet that step (5) is prepared is calcined 350 ℃ of calcining 30 minutes under argon atmosphere again, after waiting to drop to room temperature, take out sample and obtain the Ar (argon gas that will be prepared by the present invention )-Fe2O3 / FTO photoanode, marked as Ar-Fe2O3 / FTO; after photoelectrochemical test, the photocurrent density is 0.42mA / cm2 at a voltage of 1.23eV.

Embodiment 3

[0035] (1) Add 100 milliliters of deionized water to a beaker containing 4.0545 grams of ferric chloride (purity ≥ 99.0%) and 8.4992 grams of sodium nitrate (purity ≥ 99.5%) solid particles, and stir until completely dissolved;

[0036] (2) Take 1 milliliter of titanium tetrachloride (purity ≥ 99.5%) solution, add 100 milliliters of absolute ethanol (ethanol content ≥ 99.5%) to it, stir and mix evenly;

[0037] (3) Take out 750 microliters of solution from step (2) and join in step (1), stir for 30 minutes;

[0038] (4) Put the FTO sheet that has been cut to a certain area into water for ultrasonic cleaning for 30 minutes, then put it into ethanol for ultrasonic cleaning for 30 minutes, then put it into acetone solvent for ultrasonic cleaning for 30 minutes, and finally dry it with high-purity nitrogen gas. FTO film;

[0039] (5) Get 35 milliliters of the solution in the step (3) and add it to a 50 milliliter polytetrafluoroethylene reaction kettle with a stainless steel subs...

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Abstract

The invention discloses a Fe2-xTixO3 / FTO photo-anode preparing technology and a treatment method capable of improving photocurrent density of a photo-anode. According to the Fe2-xTixO3 / FTO photo-anode preparing technology, a photo-anode precursor is prepared in hydrothermal environment with solubility trivalent ferric salt and alkali metal nitrates serving as a titanium source in an organic titanium solution and FTO conductive glass serving as a carrier, and the treatment method is adopted for treating the precursor; through the photoelectricity test, it shows that after the photo-anode is prepared through the technology, the photocurrent density of Ar-Fe2-xTixO3 / FTO is 2.6 0mA / cm<2> at 1.23eV, the photocurrent density of Air-Fe2O3 / FTO is 0.12 mA / cm<2> at 1.23eV, and the photocurrent density is improved by more than 21 times. Therefore, according to the prepared photo-anode and the treatment method of the photo-anode, the advanced technical means with the low energy consumption and the efficient water decomposition is achieved, the good industrial application prospect is achieved, and the technology and the method can be used for relieving the global increasingly-strained energy supply situation at present.

Description

technical field [0001] The invention belongs to the technical field of solar cell material preparation, and specifically relates to a photoanode prepared by in-situ growth of Fe2-xTixO3 onto fluorine-doped tin dioxide (conductive glass, referred to as "FTO"). A treatment that can greatly increase the photocurrent density. Background technique [0002] A strong reliance on fossil fuels makes our economy vulnerable to erratic growth from rising prices, and the overuse of fossil fuels contributes to air pollution and global warming. Therefore, it is a very urgent issue to develop clean and renewable alternatives to fossil fuels. Among various alternative energy strategies, hydrogen is recognized as the most ideal new energy. It is not only non-toxic and pollution-free, but also has a high calorific value and a wide range of raw material sources. How to produce hydrogen efficiently and stably with low energy consumption has become a major problem that plagues the world. Decomp...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06
CPCC25B1/04C25B1/55C25B11/051C25B11/077Y02E60/36
Inventor 鄢俊敏易莎莎李思佳乌兰巴日段焱鑫蒋青
Owner JILIN UNIV
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