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Nano Co3O4/TiO2 semiconductor composite film and application thereof

A composite film, semiconductor technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of easy recombination of photogenerated carriers, low utilization of visible light of photoanodes, etc. The effect of low temperature, increased visible light absorption, and simple method

Active Publication Date: 2019-07-26
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at TiO 2 Array photoanodes have the disadvantages of low utilization rate of visible light and easy recombination of photogenerated carriers, providing a nano-Co 3 o 4 / TiO 2 Semiconductor Composite Film and Its Application

Method used

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  • Nano Co3O4/TiO2 semiconductor composite film and application thereof
  • Nano Co3O4/TiO2 semiconductor composite film and application thereof
  • Nano Co3O4/TiO2 semiconductor composite film and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] co 3 o 4 / TiO 2 The preparation of composite film light comprises the following steps:

[0038] A titanium foil with a purity of 99.9 wt.% and a thickness of 0.3 mm was cut into a rectangular titanium sheet of 1 cm×3 cm. Soak the titanium sheet in ethanol solution for 30 minutes to remove surface oil and other impurities. Afterwards, the titanium sheet was rinsed with distilled water and ultrasonically cleaned twice with distilled water for 10 min each time to further remove oil stains. The titanium sheet after ultrasonication is rinsed with ethanol to remove water, and finally the cleaned titanium sheet is soaked in ethanol for later use.

[0039] TiO 2 The nanotube array film is prepared by anodic oxidation and calcined. Using a two-electrode system, the above-mentioned titanium sheet was dried as a working electrode, and a platinum electrode was used as a counter electrode. The two electrodes were respectively placed in the electrolyte, and oxidized for 1 hour ...

Embodiment 2

[0048] co 3 o 4 / TiO 2 The preparation of composite film light comprises the following steps:

[0049] A titanium foil with a purity of 99.9 wt.% and a thickness of 0.3 mm was cut into a rectangular titanium sheet of 1 cm×3 cm. Soak the titanium sheet in ethanol solution for 30 minutes to remove surface oil and other impurities. Afterwards, the titanium sheet was rinsed with distilled water and ultrasonically cleaned twice with distilled water for 10 min each time to further remove oil stains. The titanium sheet after ultrasonication is rinsed with ethanol to remove water, and finally the cleaned titanium sheet is soaked in ethanol for later use.

[0050] TiO 2 The nanotube array film is prepared by anodic oxidation and calcined. Using a two-electrode system, the above-mentioned titanium sheet was dried as a working electrode, and a platinum electrode was used as a counter electrode. The two electrodes were respectively placed in the electrolyte, and oxidized for 1 hour ...

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Abstract

The invention relates to the technical field of nano materials, and in particular to a nano Co3O4 / TiO2 semiconductor composite film and an application thereof. The Co3O4 / TiO2 semiconductor composite film can be used as an anti-corrosion protective film for inhibiting metal corrosion. Co3O4 nano cube particles are loaded on a TiO2 array tube orifice through a low-temperature hydrothermal method, and calcining is carried out to form a stable Co3O4 / TiO2 composite film; and the narrow-band-gap p-type semiconductor Co3O4 nano-particles are loaded on an n-type TiO2 nanotube orifice to reduce electron-hole recombination so as to obtain the nano Co3O4 / TiO2 semiconductor composite film. The Co3O4 / TiO2 composite film photoanode is coupled with 304 stainless steel, so that the potential of the stainless steel can be reduced to minus 0.66V; and the composite film has a good cathode protection effect under the dark state, and has the advantages of being simple in preparation method, high in visible light utilization rate and capable of providing continuous protection under the dark state.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a nanometer Co 3 o 4 / TiO 2 Semiconductor composite film and its application. Background technique [0002] Metal corrosion is a naturally occurring phenomenon that causes severe economic, social and ecological losses. In 2014, the economic cost caused by corrosion in my country was about 2 trillion yuan, accounting for 3.34% of GDP in that year. In the ocean, which accounts for about 70% of the world's total area, due to the erosion of chloride ions and harsh conditions such as humid atmospheric environment, the corrosion of metals in the marine environment is often more serious than that in inland areas. [0003] As a new and effective anti-corrosion technology, photogenerated cathodic protection technology has the advantages of no need to consume electric energy, and the photoanode can be reused. It is especially suitable for the offshore environment where there is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/12C25D11/26C23C18/12C23C28/04B82Y30/00
CPCB82Y30/00C23C18/1216C23C28/042C23F13/12C25D11/26
Inventor 王秀通李鑫冉南有博于腾蒋全通杨黎晖段继周黄彦良侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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