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Composite photo anode and preparation method thereof

A technology of composite light and anode, applied in the direction of electrode, electrode shape/type, electrolysis process, etc., can solve the problems of photochemical corrosion, high material price, inability to absorb visible light, etc., and achieve the effect of increasing utilization efficiency and reducing transmission

Inactive Publication Date: 2016-08-10
JINAN LEINUO NEW ENERGY TECH CO LTD
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Problems solved by technology

[0006] Aiming at the shortcomings of the existing photoanode materials for hydrogen production that cannot absorb visible light, serious photochemical corrosion and high material price, the present invention proposes a new type of composite photoanode for solar cracking water to produce hydrogen and oxygen

Method used

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  • Composite photo anode and preparation method thereof
  • Composite photo anode and preparation method thereof
  • Composite photo anode and preparation method thereof

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Embodiment Construction

[0025] The manufacturing method and practical effects of the present invention will be further described below in conjunction with a specific embodiment and accompanying drawings. The examples used are only for explaining the present invention, not for limiting the scope of the present invention.

[0026] Making ZnFe 2 o 4 -ZnO composite photoanode.

[0027] In the first step, monodisperse ZnO nanorod arrays were prepared on the conductive glass surface by a hydrothermal method. First on the FTO conductive glass (total area 1×1.3 cm 2 , with an effective photosensitive area of ​​1×1 cm 2 ) surface by the sol-gel method to deposit a ZnO seed layer, followed by a hydrothermal reaction at 95 °C for 4 hours in a solution containing 0.025 mol / L zinc acetate and hexamethylenetetramine respectively to obtain ZnO nanoparticles grown on the seed layer rod arrays, and finally increase the crystallinity of ZnO nanorod arrays by heat treatment at 500 °C for 1 h.

[0028] In the seco...

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Abstract

The invention relates to a novel composite photo anode used for producing hydrogen and oxygen by splitting water with sunlight, and belongs to the technical field of preparation of electrode materials. The composite photo anode comprises a substrate, a ZnO nano rod array and ZnFe2O4 nano fibers. The substrate is fluoro-doped tin dioxide conductive glass (FTO glass), wherein the ZnO nano rod array is vertically dispersed on the surface of the substrate. The ZnFe2O4 nano fibers are amorphously deposited on the surface of ZnO nano rods, thereby forming a three-dimensional network structure with the ZnO nano rod array. The photo anode can effectively absorb visible light which is repeatedly diffracted in the three-dimensional network structure formed on the surface of the electrode. Meanwhile, a p-n junction electric field formed in the interface of the composite material has separation effect on photo-induced electron-cavity, so that photoelectric conversion performance in sunlight splitting water can be optimized as more as possible.

Description

technical field [0001] The invention relates to a novel composite photoanode which utilizes sunlight to split water to produce hydrogen and oxygen, and belongs to the technical field of electrode material preparation. Background technique [0002] As we all know, hydrogen has high energy density and the products released in the combustion process are environmentally friendly, so it has always been considered as an ideal green energy carrier. Using the principle of photoelectrochemistry (PEC) or photocatalysis, water can be split into hydrogen and oxygen. This method of directly producing hydrogen energy from solar energy is considered to be an important way to produce renewable and clean energy. [0003] TiO 2 , ZnO, SrTiO 3 Equal-bandgap semiconductor materials are considered to be excellent photoanode materials due to their high stability in electrolyte solutions, but their response characteristics in the ultraviolet region limit their application in the actual solar spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03C25B11/06C25B1/04
CPCY02E60/36
Inventor 补钰煜卢彭杜巍涛
Owner JINAN LEINUO NEW ENERGY TECH CO LTD
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