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Ternary semiconductor composite film and preparation method and application thereof

A composite film and semiconductor technology, applied in chemical instruments and methods, iron compounds, surface reaction electrolytic coatings, etc., can solve the problems of poor separation of electrons and holes, photogenerated charge recombination, short photoresponse range, etc., and achieve excellent The effect of corrosion protection properties

Inactive Publication Date: 2019-12-20
NORTHWEST NORMAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies pointed out in the prior art, to provide a ternary semiconductor composite thin film and its preparation method and application, aiming to solve the electron migration generated by the wide band gap of a single TiO2 semiconductor material in the prior art after absorbing light The efficiency is low, the separation effect of electrons and holes is poor, and it is easy to cause problems such as recombination of photogenerated charges and short photoresponse range.

Method used

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  • Ternary semiconductor composite film and preparation method and application thereof
  • Ternary semiconductor composite film and preparation method and application thereof
  • Ternary semiconductor composite film and preparation method and application thereof

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Embodiment 1

[0030] A ternary semiconductor composite film, including the following components: TiO2, CdS and ZnFe2O4.

[0031] The method for preparing the ternary semiconductor composite film includes the following steps:

[0032] (1) Titanium sheet pretreatment

[0033] Cut the titanium sheet into small pieces about 15mm×10mm, and then use 400 mesh, 800 mesh and 2000 mesh sandpaper to polish the titanium foil until no scratches are visible. Put the titanium foil in a beaker, wash with acetone, isopropanol, and distilled water in order for about 10 minutes, then polish and dry.

[0034] (2) Preparation of titanium sheet coated with TiO2 nanotubes

[0035] Prepare 50 mL of 0.5% NH4F and 97% ethylene glycol mixed aqueous solution, and put it in a 100 mL beaker. A two-electrode system was used, Pt was used as the cathode, and the Ti plate was used as the anode. After anodizing at 20V for 1 hour, the Ti plate was taken out of the solution and washed with deionized water. Finally, it was placed in a...

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Abstract

The invention relates to the technical field of photochemical cathodic protection, in particular to a ternary semiconductor composite film and a preparation method and application thereof. The invention aims at providing the ternary semiconductor composite film and the preparation method and application thereof according to the defects pointed in the prior art, and aims at solving the problems that in the prior art, the migration rate of electrons generated after light absorbing of broad-band gaps of a single TiO2 semiconductor material, and the separation effect of the electrons and holes ispoor, so that photo-generated charge recombination and a shorter optical response range are easy to cause. The TiO2 film, TiO2 / CdS film and TiO2 / CdS / ZnFe2O4 film are sequentially prepared on titaniumsheets through the methods such as an anodic oxidation method, a continuous ion layer adsorption method and a hydrothermal method. The ternary semiconductor composite film has the beneficial effects that the photoelectrochemistry property and photogenic cathodic protection property of the TiO2 / CdS / ZnFe2O4 film are significantly improved compared with that of a single TiO2 sample, and the ternary semiconductor composite film has an excellent anti-corrosion protection property on stainless steel.

Description

Technical field [0001] The invention relates to the technical field of photoelectrochemical cathode protection, in particular to a ternary semiconductor composite film and a preparation method and application thereof. Background technique [0002] Stainless steel is widely used in various fields of modern society due to its excellent anti-corrosion properties. However, its performance is related to the exposed environment, and local corrosion may occur when immersed in a chlorine-containing or humid environment. Therefore, it is necessary to improve the corrosion resistance of stainless steel. The existing corrosion resistance methods include coating protective coatings, adding corrosion inhibitors and electrochemical protection methods. Among them, electrochemical protection methods have the advantages of long service life and large protection range, but usually Will cause energy and material loss. Therefore, the electrochemical protection method needs to be optimized. Because...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/14C25D11/26C01G11/02C01G49/00
CPCC01G11/02C01G49/0063C01P2002/72C01P2002/84C01P2004/03C01P2004/20C23F13/14C25D11/26
Inventor 郭惠霞刘籽烨李亮亮苏策于冬梅张玉蓉
Owner NORTHWEST NORMAL UNIVERSITY
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