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Preparation method of photo anode material of battery prepared through photocatalytic decomposition of water into hydrogen

A technology of photolysis of water to produce hydrogen and photoanode, applied in the direction of electrodes, nanotechnology for materials and surface science, electrode shape/type, etc., can solve the problems of limited photoelectric conversion efficiency, limited surface area, low photocatalytic activity, etc. , to achieve the effects of good diffusion, good size uniformity and large specific surface area

Active Publication Date: 2018-08-03
HUAIBEI NORMAL UNIVERSITY
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Problems solved by technology

[0004] In recent years, people have used narrow-bandgap InP as the photoelectrode material for photoelectric water splitting to produce hydrogen, because its direct bandgap of 1.35 eV matches the solar spectrum very well, and has high theoretical energy efficiency. However, the pure InP surface has low photoelectricity. Catalytic activity and limited surface area limit the photoelectric conversion efficiency

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  • Preparation method of photo anode material of battery prepared through photocatalytic decomposition of water into hydrogen
  • Preparation method of photo anode material of battery prepared through photocatalytic decomposition of water into hydrogen
  • Preparation method of photo anode material of battery prepared through photocatalytic decomposition of water into hydrogen

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Embodiment 1

[0036] A method for preparing photoanode materials for photolysis of water to produce hydrogen cells, firstly using InP wafer as substrate, copper source and carboxylic acid as Cu 2 The precursor solution of O was prepared by electrochemical anodic etching and wet etching to prepare one-dimensional InP nanopore arrays, and then using the one-dimensional InP nanopore arrays as a template, the Cu 2 O nanoparticles loaded in InP nanopore arrays to construct InP / Cu 2 O nano-heterojunction array composite structure.

[0037] Such as figure 1 Shown, InP / Cu 2 The fabrication of O nanoheterojunction arrays can be divided into two steps, first, an ordered InP nanohole array is prepared by a two-step etching method, and then the InP / Cu 2 O nanoheterojunction arrays.

Embodiment 2

[0039] A method for preparing a photoanode material for photolysis of water to produce hydrogen, the steps are as follows:

[0040] (1) Cut the n-InP wafer into samples of the same size, then put the cut InP samples into acetone and absolute ethanol for more than 5 minutes and ultrasonically clean them to remove the oil on the surface of the InP samples, and then clean them with deionized water Rinse the InP sample three times, then dry it for later use;

[0041] (2) Sputter an indium film on the back of the InP sample in step 1 by DC magnetron sputtering, then put the InP sample into a fully dried quartz boat, place it in a chemical vapor deposition furnace with a controllable heating rate, and N 2In the atmosphere environment, the temperature is raised at a rate of 2-5°C / min and maintained at 350°C for 1 minute to form a good ohmic contact between the InP and the indium film, and then use high-purity conductive silver paste to cover the back of the InP sample Connect with ...

Embodiment 3

[0053] A method for preparing a photoanode material for photolysis of water to produce hydrogen, the steps are as follows:

[0054] (1) Cut the n-InP wafer into samples of the same size, then put the cut InP samples into acetone and absolute ethanol for more than 5 minutes and ultrasonically clean them to remove the oil on the surface of the InP samples, and then clean them with deionized water Rinse the InP sample three times, then dry it for later use;

[0055] (2) Sputter an indium film on the back of the InP sample in step 1 by DC magnetron sputtering, then put the InP sample into a fully dried quartz boat, place it in a chemical vapor deposition furnace with a controllable heating rate, and N 2 In the atmosphere environment, the temperature is raised at a rate of 2-5° C. / min and maintained at 350° C. for 1 minute, so as to form a good ohmic contact between the InP and the indium film. Then use high-purity conductive silver paste to connect the back of the InP sample wit...

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Abstract

The invention discloses a preparation method of a photo anode material of a battery prepared through photocatalytic decomposition of water into hydrogen. The preparation method comprises the steps offirstly adopting an InP chip as a substrate, and preparing a one-dimensional well-aligned InP nanopore array through an electrochemical anode etching method and a wet etching method; and then adoptingthe one-dimensional well-aligned InP nanopore array as a template, loading Cu2O nano-particles into the InP nanopore array through an electrochemical deposition method, and building an InP / Cu2O nanometer heterojunction array composite structure. According to the preparation method provided by the invention, the InP / Cu2O nanometer heterojunction array photo anode material is ingeniously built through regulating the conditions such as the time of electrochemical etching of InP, pH of a copper source and a complexing agent, and electrodeposition time, so that the contact area of heterojunctionscan be greatly increased, electrochemical reaction active sites can be greatly increased, and an excellent photon-generated carrier separating capacity is realized; a reaction reagent is convenient, easy to get, green and environmental-friendly; the yield and the purity are high; and the obtained material is large in specific surface area, good in size uniformity, and suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a battery anode material, in particular to a preparation method of a photoanode material of a photolysis water hydrogen production battery. Background technique [0002] As a clean and renewable new energy, hydrogen energy has high energy density and good production efficiency, making it an ideal carrier for energy storage. Therefore, the development of hydrogen energy has become a research hotspot in various countries in the world. As an energy conversion method that can use solar energy to directly split water into hydrogen and oxygen at room temperature, photolytic water cells are one of the most promising methods for producing hydrogen energy. However, the solar energy conversion efficiency of most electrode materials currently Still low. Therefore, designing and synthesizing new materials is a hot spot in this research field. [0003] Early researchers often focused on wide-bandgap oxide semicond...

Claims

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Application Information

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IPC IPC(8): C23F17/00C25B11/03C25B11/04C25F3/12C25D3/38C25D7/12C23C14/18C23C14/35C23C14/58B82Y30/00
CPCB82Y30/00C23C14/185C23C14/35C23C14/5806C23F17/00C25D3/38C25D7/12C25F3/12C25B11/031C25B11/069C25B11/077
Inventor 李强代凯张金峰李宏张敏朱光平
Owner HUAIBEI NORMAL UNIVERSITY
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