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Tricobalt tetroxide composite α-type iron oxide worm-like nanostructure array photoanode, preparation method and application thereof

A technology of cobalt tetroxide and nanostructure, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of slow oxygen evolution reaction kinetics, short hole diffusion distance, poor conductivity, etc. Achieve good oxygen evolution catalytic activity, low price, and the effect of inhibiting recombination

Active Publication Date: 2019-08-27
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has the disadvantages of slow oxygen evolution reaction kinetics, poor conductivity, short hole diffusion distance, and easy recombination of electron-hole pairs.

Method used

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  • Tricobalt tetroxide composite α-type iron oxide worm-like nanostructure array photoanode, preparation method and application thereof
  • Tricobalt tetroxide composite α-type iron oxide worm-like nanostructure array photoanode, preparation method and application thereof
  • Tricobalt tetroxide composite α-type iron oxide worm-like nanostructure array photoanode, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of tricobalt tetroxide composite α-type iron oxide worm-like nanostructure array photoanode

[0027] (1) Sonicate the FTO glass with acetone for 15 minutes, then wash it with water; then use it for 15 minutes with absolute ethanol, and then wash it with water; finally use deionized water for 15 minutes, then soak it in 0.15M FeCl 3 ·6H 2 Under the condition of 100°C in O solution, carry out hydrothermal reaction for 4h, then raise the temperature to 550°C in the muffle furnace and keep it for 1h, then raise the temperature to 730°C and keep it for 15min, then cool down to obtain FTO glass loaded with α-type iron oxide, The α-type iron oxide is in the form of a worm-like nanostructure array;

[0028] (2) Co(NO 3 ) 2 ·6H 2 O, NH 4 F and CO(NH 2 ) 2 Mix and prepare the precursor solution at a weight ratio of 2:7:10, then place the precursor solution and the FTO glass loaded with α-type iron oxide in step (1) in the reaction vessel at the same time and re...

Embodiment 2

[0031] Preparation of tricobalt tetroxide composite α-type iron oxide worm-like nanostructure array photoanode

[0032] (1) Sonicate the FTO glass with acetone for 10 minutes and wash it with water; then use absolute ethanol for 10 minutes and wash it with water; finally use deionized water for 10 minutes and immerse it in 0.12M FeCl 3 ·6H 2 Under the condition of 120°C in the O solution, carry out the hydrothermal reaction for 3h, then raise the temperature to 550°C in the muffle furnace and keep it for 1h, then raise the temperature to 700°C and keep it for 15min, then cool down to obtain FTO glass loaded with α-type iron oxide, The α-type iron oxide is in the form of a worm-like nanostructure array;

[0033] (2) Co(NO 3 ) 2 ·6H 2 O, NH 4 F and CO(NH 2 ) 2 Mix and prepare the precursor solution at a weight ratio of 1:7:10, then place the precursor solution and the FTO glass loaded with α-type iron oxide in step (1) in the reaction vessel at the same time and react at ...

Embodiment 3

[0036] Preparation of tricobalt tetroxide composite α-type iron oxide worm-like nanostructure array photoanode

[0037] (1) Sonicate the FTO glass with acetone for 12 minutes, then wash it with water; then use absolute ethanol for 12 minutes, then wash it with water; finally use deionized water for 12 minutes, then immerse it in 0.1M FeCl 3 ·6H 2 Under the condition of 110°C in O solution, the hydrothermal reaction was carried out for 6h, then the temperature was raised to 550°C in the muffle furnace and kept for 1h, then the temperature was raised to 715°C and kept for 15min, and the FTO glass loaded with α-type iron oxide was obtained by cooling down. The α-type iron oxide is in the form of a worm-like nanostructure array;

[0038] (2) Co(NO 3 ) 2 ·6H 2 O, NH 4 F and CO(NH 2 ) 2 Mix and prepare the precursor solution at a weight ratio of 3:7:10, then place the precursor solution and the FTO glass loaded with α-type iron oxide in step (1) in the reaction vessel at the ...

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Abstract

The invention relates to a cobaltosic oxide composite alpha type iron oxide vermicule nanostructure array photoanode and a preparation method and application thereof, and belongs to the technical field of new energy materials. Through hydrothermal reaction, alpha type iron oxide grows on an electric conducting substrate in a manner of vermicule nanostructure array; cobaltosic oxide nanoparticles are continuously attached on the alpha type iron oxide by using a hydrothermal method; and high specific surface area and excellent oxygen evolution catalysis activity of the cobaltosic oxide nanoparticles are fully used for effectively inhibiting combination of electron-hole pairs, so that the performances of photoelectrolysis water are greatly improved. Meanwhile, the hydrothermal process suitable for industrialization is adopted; in the process of preparing a cobaltosic oxide modified alpha type iron oxide photoanode, used materials are low in cost, so that the production cost is reduced, and large-scale production is realized.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and specifically relates to tricobalt tetroxide composite α-type iron oxide worm-like nanostructure array photoanode and its preparation method and application. Background technique [0002] Hydrogen has extremely high energy density, and as a fuel, it will not produce any pollutants and greenhouse effect, so it is a very potential energy carrier. On the other hand, solar energy is an inexhaustible clean energy source, and water is extremely abundant on the earth. Therefore, storing solar energy in hydrogen through photoelectric water splitting is a very potential method to solve the depletion of fossil fuels and the deterioration of the ecological environment today. However, since water oxidation is a four-electron process requiring molecular rearrangement, the performance of photoelectrochemical water splitting is severely limited by the anode. Hematite Fe2O3 (α-Fe 2 o 3 ) as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B1/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25B1/04C25B1/55C25B11/091Y02E60/36
Inventor 袁伟永李春梅李长明
Owner SOUTHWEST UNIV
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