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Method for preparing Bi2S3/TiO2 nanorod composite-film photo-anodes

A technology of nanorods and composite films, which is applied in the field of preparation of Bi2S3/TiO2 nanorod composite film photoanodes, which can solve the problems that visible light and photogenerated carriers are easy to recombine, and nanofilm materials cannot be effectively used.

Inactive Publication Date: 2016-03-09
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome single TiO 2 Nano-film materials cannot effectively utilize visible light and photogenerated carriers are easy to recombine, and provide a Bi with high-efficiency photogenerated cathodic protection effect. 2 S 3 / TiO 2 Preparation method of nanorod composite film photoanode

Method used

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  • Method for preparing Bi2S3/TiO2 nanorod composite-film photo-anodes
  • Method for preparing Bi2S3/TiO2 nanorod composite-film photo-anodes

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Experimental program
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Effect test

Embodiment 1

[0031] According to the above-mentioned technical scheme (concrete steps), prepare Bi 2 S 3 / TiO 2 Nanorod composite film, and test the cathodic protection effect of composite film as photoanode on 403 stainless steel.

[0032] Take a 2.2mm thick FTO conductive glass sample with a length of 15mm and a width of 10mm. Sequentially ultrasonic cleaning in acetone, absolute ethanol and deionized water for 30 min.

[0033] TiO 2 Preparation of the seed layer: according to the above technical scheme, pipette 1mL of TiCl 4 Solution, carefully drop in 50g of ice water mixed solution to prepare TiCl 4 Aqueous solution, place the FTO substrate flat in the solution with the conductive surface upward, and heat-treat it in an oven at 70°C for 30 minutes. After the reaction is complete, take out the sample, wash it with deionized water, and put the sample into the muffle furnace after drying. Calcined at 550°C for 60min, then cooled to room temperature naturally.

[0034] TiO on FTO s...

Embodiment 2

[0042] According to the above-mentioned technical scheme (concrete steps), prepare Bi 2 S 3 / TiO 2 Nanorod composite film, and test the cathodic protection effect of composite film as photoanode on 403 stainless steel.

[0043] Take a 2.2mm thick FTO conductive glass sample with a length of 15mm and a width of 10mm. Sequentially ultrasonic cleaning in acetone, absolute ethanol and deionized water for 30 min.

[0044] TiO 2 Preparation of the seed layer: according to the above technical scheme, pipette 1mL of TiCl 4 Solution, carefully drop in 50g of ice water mixed solution to prepare TiCl 4 Aqueous solution, place the FTO substrate flat in the substrate solution with the conductive surface upward, and heat-treat in an oven at 70°C for 30 minutes. After the reaction is complete, take out the sample, wash it with deionized water, and put the sample into the muffle furnace after drying. Calcined at 550 °C for 60 min, then cooled to room temperature naturally.

[0045] TiO...

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Abstract

The invention relates to a nanorod composite-film photo-anode, in particular to a method for preparing a Bi2S3 / TiO2 nanorod composite-film photo-anode. The method includes the steps of preparing a TiO2 seed film sample, preparing an FTO surface TiO2 nanorod array film, and preparing the Bi2S3 / TiO2 nanorod composite-film photo-anode. A hydrothermal method and a circulation dipping method are combined; and when a prepared Bi2S3 / TiO2 nanorod composite film is arranged in a mixed solution of Na2S of 0.1 mol / L and NaOH of 0.2 mol / L, and irradiation is carried out through white light, the electrode potential of 403# stainless steel, connected with the Bi2S3 / TiO2 nanorod composite film, in a NaCl solution of 0.5 mol / L can be reduced by 725 mV relative to the natural corrosion potential of the stainless steel, remarkable cathode polarization occurs, and it is indicated that the composite film has the good photoproduction cathode protection effect on the stainless steel. When irradiation is carried out again after illumination is stopped for a certain period of time, the electrode potential can still be reduced to a value the same as the previous value, and good stability is achieved.

Description

technical field [0001] The present invention relates to nanorod composite film photoanode, especially relates to Bi 2 S 3 / TiO 2 A method for preparing a nanorod composite film photoanode. Background technique [0002] In the 1990s, Yuan et al. [1] Discover TiO 2 The nanoparticle coating can act as a photogenerated cathodic protection for the copper substrate. The basic principle is: under light, TiO 2 Absorb photons with suitable energy to generate photo-generated electron-hole pairs, and then photo-generated electrons are transferred to the protected metal surface, making its potential much lower than the self-corrosion potential to inhibit its corrosion reaction, while the holes are captured by the hole-scavenging agent in the medium capture. In a subsequent study, Fujishima et al. [2] TiO 2 Photogenerated cathodic protection effect of coating on 304 stainless steel, Tsujikawa et al. [3,4] Its photogenerated cathodic protection effect on 304 stainless steel and ...

Claims

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Application Information

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IPC IPC(8): C23F13/08
CPCC23F13/08
Inventor 杜荣归胡娟刘青梁燕
Owner XIAMEN UNIV
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