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Alpha-Fe2O3/Au nanometer-circular-truncated-cone-array photoelectrode and preparing method and application thereof

A -fe2o3, photoelectrode technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of cumbersome steps, large dosage, poor array controllability, etc.

Active Publication Date: 2018-08-28
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the plasmon enhancement mentioned in this article mainly works after the wavelength is 600nm, while for Fe 2 o 3 For photoelectrodes, the main challenge is to improve the photoelectric performance between 450-600nm (wavelength)
In addition, this method uses a large amount of gold, and uses nanoimprinting technology, the steps are cumbersome, and the array can be adjusted poorly.

Method used

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  • Alpha-Fe2O3/Au nanometer-circular-truncated-cone-array photoelectrode and preparing method and application thereof
  • Alpha-Fe2O3/Au nanometer-circular-truncated-cone-array photoelectrode and preparing method and application thereof
  • Alpha-Fe2O3/Au nanometer-circular-truncated-cone-array photoelectrode and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] (1) Dip the silicon wafer into a mixed solution of ammonia, hydrogen peroxide and water (the volume ratio of ammonia, hydrogen peroxide and water is 1:1:5), and then keep it warm at 75°C for 1 hour;

[0084] (2) Add water and 100 μL of sodium lauryl sulfate solution with a concentration of 2wt% into a petri dish with a diameter of 150 mm, place the silicon wafer treated in step (1) in the petri dish, and then use a syringe to inject Slowly add polystyrene ball solution with a diameter of 600nm and a concentration of 0.05g / mL to the petri dish, so that the polystyrene ball solution diffuses along the silicon chip into the solution of the petri dish, and the polystyrene ball will self-assemble on the surface of the petri dish Arranged to obtain a single-layer polystyrene spherical membrane;

[0085] (3) Place the cleaned quartz substrate under the single-layer polystyrene spherical membrane obtained in step (2), attach the single-layer polystyrene spherical membrane to th...

Embodiment 2

[0090] Compared with Example 1, except that the polystyrene sphere solution with a diameter of 300 nm is added dropwise in step (2), other steps and conditions are exactly the same as Example 1.

Embodiment 3

[0092] Compared with Example 1, except that the polystyrene sphere solution with a diameter of 440nm was added dropwise in step (2), other steps and conditions were exactly the same as Example 1.

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Abstract

The invention relates to an alpha-Fe2O3 / Au nanometer-circular-truncated-cone-array photoelectrode and a preparing method and application thereof. The alpha-Fe2O3 / Au nanometer-circular-truncated-cone-array photoelectrode is composed of a quartz nanometer-circular-truncated-cone-array substrate, an ITO adhesion layer, an Au layer and an alpha-Fe2O3 layer which are sequentially arranged. The preparing method includes the steps that a nanometer-circular-truncated-cone-array pattern is prepared on the surface of quartz, and the quartz nanometer-circular-truncated-cone-array substrate is obtained; the ITO layer, the Au layer and the Fe layer are sequentially grown on the obtained substrate, then annealing treatment is conducted to form a photoelectric oxidation layer, and the photoelectrode of ananometer-circular-truncated-cone-array structure is obtained. According to the alpha-Fe2O3 / Au nanometer-circular-truncated-cone-array photoelectrode and the preparing method and application thereof,by introducing the nanometer-circular-truncated-cone-array structure, a photo-anode material of a high-order nanometer-circular-truncated-cone-array structure is obtained, and the photocatalysis activity of the electrode is remarkably improved. Meanwhile, the preparing method is simple, high in controllability and low in cost, the production cost is greatly reduced, and good application prospectsare achieved.

Description

technical field [0001] The invention relates to the field of photoelectric catalysis, in particular to an α-Fe 2 o 3 / Au nano-cone array photoelectrode and its preparation method and application. Background technique [0002] Photoelectric hydrolysis hydrogen production technology is a promising way to convert solar energy into chemical energy. However, the photoelectrocatalytic efficiency of photoelectrode materials has always been the bottleneck restricting the development of solar hydrolysis hydrogen production. Experiments have proved that in order to realize hydrogen production by solar photolysis of water, the energy level of the lowest layer of the semiconductor valence band should be more positive than the oxygen evolution potential, and the uppermost energy level of the conduction band should be more negative than the hydrogen evolution potential, and an appropriate band gap (1.8eV-3.0 eV) to absorb sunlight, while having high stability in water and low price; sec...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B1/04
CPCC25B1/04C25B1/55C25B11/051C25B11/093Y02E60/36
Inventor 王文荣宫建茹
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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