Preparation method of titanium dioxide/cuprous oxide coaxial heterostructure

Abstract

The invention relates to a preparation method of a titanium dioxide / cuprous oxide coaxial heterostructure. On the basis of photocatalytic efficiency of titanium dioxide and conductivity of cuprous oxide, an electrochemical electrolytic oxidation process is utilized to firstly prepare a titanium dioxide nanotube array substrate and then prepare the titanium dioxide / cuprous oxide coaxial heterostructure product. The preparation method has the advantages of advanced technique and accurate and complete data. The product is yellow and flaky, the cross section is rectangular, and the titanium dioxide and cuprous oxide are combined through chemical bond. The product has obvious absorption action on ultraviolet light and visible light, and the current density under the irradiation of visible light is 1.0-1.6 mA / cm<2>. The titanium dioxide / cuprous oxide coaxial heterostructure can be used in solar power generation and photovoltaic products; and the preparation method is a very ideal method for preparing the titanium dioxide / cuprous oxide coaxial heterostructure.

Description

technical field [0001] The invention relates to a preparation method of a titania / cuprous oxide coaxial heterojunction, belonging to the technical field of electrochemical preparation and application. Background technique [0002] Titanium dioxide has the characteristics of high photocatalytic efficiency and good stability. The one-dimensional ordered titanium dioxide nanotube array has unique electrochemical properties. The highly ordered titanium dioxide nanotube array has high regularity, large specific surface area, and excellent electron transport. Efficiency, has been widely used in the field of solar cells and photocatalysis. [0003] The anodic oxidation method is often used to prepare titanium dioxide nanotubes. Due to the wide band gap of titanium dioxide semiconductors, it can only absorb 5% of the ultraviolet light of sunlight, which limits the application of titanium dioxide in visible light; in order to improve the absorption of titanium dioxide to visible ligh...

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Problems solved by technology

[0004] Cuprous oxide is a P-type narrow-band semiconductor material, which has wide application value in solar energy conversion. The methods for preparing cuprous oxide include thermal oxidation, chemical vapor deposition, sol-gel method, magnetron sputtering method, electric Electrochemical deposition method, electrochemical deposition is a simple and quick method to prepare cuprous oxide. Peng et al. prepared cuprous oxide particles on the surface of nanotubes by constant potential deposition, which can form heterojunction films. Chen et al. used optical reduction method Cuprous oxide particles are deposited on the surface of titania nanotubes, but in these studies, cuprous oxide exists on the surface of titania nanotubes and does not enter into the titania nanotubes or in the gaps of nanotubes, so the large specific surface area of ​​titania nanotubes cannot be utilized. However, it cannot effectively reduce the recombination of electrons and holes, which has a great impact on improving the photoelectric performance of the heterojunction.

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