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an agsbs 2 Sensitized tio 2 Composite Membrane Material and Its Preparation and Application

A composite film and nanotube array technology, which can be used in the fields of analyzing materials, electrochemical variables of materials, and material analysis by electromagnetic means, and can solve the problems of low utilization rate of visible light and so on.

Active Publication Date: 2021-09-10
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 The band gap is 3.2eV, it can only absorb ultraviolet light with a wavelength less than 378nm, and the utilization rate of visible light is low

Method used

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  • an agsbs <sub>2</sub> Sensitized tio <sub>2</sub> Composite Membrane Material and Its Preparation and Application
  • an agsbs <sub>2</sub> Sensitized tio <sub>2</sub> Composite Membrane Material and Its Preparation and Application
  • an agsbs <sub>2</sub> Sensitized tio <sub>2</sub> Composite Membrane Material and Its Preparation and Application

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Experimental program
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Embodiment 1

[0045] The preparation of photoanode comprises the following steps:

[0046] Pretreatment of titanium substrate: cutting the titanium substrate with a purity of 99.9% into a size of 1×4×0.1 cm 3 Ti flakes were used as the growth substrate for the composite film. Clean the titanium sheet with deionized water and ethanol, and dry it for later use. Weigh 7.2g NH 4 F, dissolved in 40 mL of deionized water. Measure concentrated nitric acid and 30% H in a fume hood 2 o 2 96mL each, and NH 4 F solution was mixed in a 500mL beaker, and ultrasonically mixed for 5 minutes to make a polishing solution. Select a flat and non-scratched titanium piece and put it in a small amount of polishing solution, wait for 20-30s, take out the titanium piece and wash it with deionized water. After polishing, put the polished titanium sheet into a beaker filled with deionized water, and ultrasonically use deionized water and ethanol for 5 minutes in turn, alternating three times, and finally soak...

Embodiment 2

[0055] The preparation of photoanode comprises the following steps:

[0056] Pretreatment of titanium substrate: cutting the titanium substrate with a purity of 99.9% into a size of 1×4×0.1 cm 3 Ti flakes were used as the growth substrate for the composite film. Clean the titanium sheet with deionized water and ethanol, and dry it for later use. Weigh 7.2g NH 4 F, dissolved in 40 mL of deionized water. Measure concentrated nitric acid and 30% H in a fume hood 2 o 2 96mL each, and NH 4 F solution was mixed in a 500mL beaker, and ultrasonically mixed for 5 minutes to make a polishing solution. Select a flat and non-scratched titanium piece and put it in a small amount of polishing solution, wait for 20-30s, take out the titanium piece and wash it with deionized water. After polishing, put the polished titanium sheet into a beaker filled with deionized water, and ultrasonically use deionized water and ethanol for 5 minutes in turn, alternating three times, and finally soak...

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Abstract

The invention relates to a composite film photoanode, in particular to an AgSbS 2 Sensitized TiO 2 Composite membrane material (AgSbS 2 / TiO 2 Nanotube array composite film material) and its preparation and application. The composite film structure of the present invention is AgSbS 2 Nanoparticles deposited on TiO 2 on the nanotube. AgSbS 2 After nanoparticle compounding, TiO 2 The absorption in the visible light region is significantly improved, and the matched energy band position after semiconductor recombination can drive the rapid separation of photogenerated carriers and reduce the secondary recombination. AgSbS of the present invention 2 Sensitized TiO 2 Composite thin films of nanotube arrays, when used as photoanode materials for cathodic protection, compared with TiO 2 material, can improve the utilization rate of visible light and the separation rate of photogenerated carriers, significantly reduce the electrode potential of 304 stainless steel, and reduce the corrosion rate.

Description

technical field [0001] The invention relates to a composite film photoanode, in particular to an AgSbS 2 Sensitized TiO 2 Composite membrane material (AgSbS 2 / TiO 2 Nanotube array composite film material) and its preparation and application. Background technique [0002] Photogenerated cathodic protection technology is environmentally friendly, does not require external supply current, and does not consume photoanode materials during the protection process. It has the advantage of saving resources and has been widely studied and applied. Photogenerated cathodic protection technology is a technology in which the semiconductor is coated on the surface of the metal to be protected, or connected to the metal as an anode through a wire, so as to protect the metal. Under light conditions, electrons in the semiconductor valence band absorb photon energy, are excited to transition to the conduction band, and generate electron-hole pairs. The holes are oxidized by the electron ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26C23F13/14G01N27/30G01N27/27B82Y40/00
CPCB82Y40/00C23F13/14C25D11/26G01N27/27G01N27/305
Inventor 王秀通徐慧李鑫冉池丽凤南有博孙丛涛段继周
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI