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Preparation method of compact Fe2O3 film based on step voltage

A step voltage, fe2o3 technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of cumbersome process and non-dense film, achieve high photoelectric conversion efficiency and realize the effect of dense arrangement

Inactive Publication Date: 2021-03-09
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To solve the traditional Fe 2 o 3 Thin film is not dense, and the technical problem of loaded down with trivial details of procedure, one of purpose of the present invention is to provide a kind of compact Fe based on step voltage 2 o 3 The preparation method of thin film, this preparation method is simple and easy and cost is low, can obtain dense Fe 2 o 3 film

Method used

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  • Preparation method of compact Fe2O3 film based on step voltage
  • Preparation method of compact Fe2O3 film based on step voltage
  • Preparation method of compact Fe2O3 film based on step voltage

Examples

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Effect test

Embodiment 1

[0072] Preparation of Fe by step voltage 2 o 3 film

[0073] 1) Use acetone and deionized water to ultrasonically clean the FTO conductive glass, repeat it several times until it is cleaned, and then dry it for later use.

[0074] 2) Weigh a certain amount of boric acid, ascorbic acid, ferrous sulfate heptahydrate and PEG20000, dissolve them in deionized water, and prepare the required electrolyte. Wherein the molar concentration of boric acid is 0.2mol . L -1 ; The molar concentration of ascorbic acid is 0.0006mol . L -1 ; The molar concentration of ferrous sulfate heptahydrate is 0.2mol . L -1 ; The molar concentration of PEG20000 is 0.0012mol . L -1 .

[0075] A three-electrode electrolysis system composed of FTO conductive glass, graphite electrode, Ag / AgCl electrode and the above-mentioned electrolyte is adopted, and a step voltage deposition process is used to generate electricity on the surface of FTO conductive glass by changing the applied voltage between FT...

Embodiment 2

[0116] Preparation of Fe by step voltage 2 o 3 film

[0117] 1) Use acetone and deionized water to ultrasonically clean the FTO conductive glass, repeat it several times until it is cleaned, and then dry it for later use.

[0118] 2) Weigh a certain amount of boric acid, ascorbic acid, ferrous sulfate heptahydrate and PEG20000, dissolve them in deionized water, and prepare the required electrolyte. Wherein the molar concentration of boric acid is 0.2mol . L -1 ; The molar concentration of ascorbic acid is 0.0006mol . L -1 ; The molar concentration of ferrous sulfate heptahydrate is 0.2mol . L -1 ; The molar concentration of PEG20000 is 0.0012mol . L -1 .

[0119] A three-electrode electrolysis system composed of FTO conductive glass, graphite electrode, Ag / AgCl electrode and the above-mentioned electrolyte is adopted, and a step voltage deposition process is used to generate electricity on the surface of FTO conductive glass by changing the applied voltage between FT...

Embodiment 3

[0123] Preparation of Fe by step voltage 2 o 3 film

[0124] 1) Use acetone and deionized water to ultrasonically clean the FTO conductive glass, repeat it several times until it is cleaned, and then dry it for later use.

[0125] 2) Weigh a certain amount of boric acid, ascorbic acid, ferrous sulfate heptahydrate and PEG20000, dissolve them in deionized water, and prepare the required electrolyte. Wherein the molar concentration of boric acid is 0.2mol . L -1 ; The molar concentration of ascorbic acid is 0.0006mol . L -1 ; The molar concentration of ferrous sulfate heptahydrate is 0.2mol . L -1 ; The molar concentration of PEG20000 is 0.0012mol . L -1 .

[0126] A three-electrode electrolysis system composed of FTO conductive glass, graphite electrode, Ag / AgCl electrode and the above-mentioned electrolyte is adopted, and a step voltage deposition process is used to generate electricity on the surface of FTO conductive glass by changing the applied voltage between FT...

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Abstract

The invention discloses a preparation method of a compact Fe2O3 film based on step voltage, which comprises the following steps: cleaning a conductive substrate, carrying out ultrasonic cleaning on the conductive substrate by using an organic solvent and deionized water, repeating for many times until the conductive substrate is cleaned, and drying for later use; carrying out step voltage electrochemical deposition, specifically, adopting a three-electrode electrolysis system, and depositing a layer of compact Fe film is electrochemically on the surface of a working electrode by changing the applied voltage between the working electrode and a counter electrode; and carrying out oxidation treatment, specifically, placing the prepared compact Fe film in a tubular furnace and calcining in theair atmosphere to obtain the compact Fe2O3 film. The Fe2O3 film prepared by the method is compact in structure, has high photoelectric conversion efficiency, and can be used as a preferred material of a photo-anode in a catalytic system.

Description

technical field [0001] The invention belongs to the technical field of metal thin film preparation, in particular to a step voltage-based dense Fe 2 o 3 The method of film preparation. Background technique [0002] Using photoelectrochemical methods to convert solar energy into sustainable clean energy is our goal. In 1972, "Nature" magazine first reported the use of TiO 2 As a photoanode for photoelectrocatalytic water splitting. Anatase TiO 2 Bandgap width of 3.2 eV, rutile TiO 2 The bandgap width is 3.0 eV, and only ultraviolet light can excite its electron-hole separation, which cannot fully utilize sunlight. In many semiconductors, Fe 2 o 3 It has the following advantages and becomes one of the preferred materials for photoanodes to catalyze water oxidation: 1) small band gap, with a band gap of 2.2 eV, and visible light with a wavelength of 560 nm can excite its electron-hole separation; 2) cheap price; 3 ) has good stability and is not easily corroded by ligh...

Claims

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Application Information

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IPC IPC(8): C25B11/077C25B11/087C25D3/20C25D5/48C23C8/14
CPCC23C8/14C25D3/20C25D5/48
Inventor 李晓霞王晓农张敬岩赵大鹏白秀军吴梦醒顾有林解博
Owner NAT UNIV OF DEFENSE TECH
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