Photo-anode composite membrane material and application thereof

A technology of photoanode and composite film, which is applied in electrolytic inorganic material coating, metal material coating process, nanotechnology for materials and surface science, etc. Unable to produce photogenerated electrons and other problems, to achieve the effect of improving cathodic protection effect, improving cathodic protection effect, and excellent anti-corrosion protection

Active Publication Date: 2021-05-11
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, TiO 2 It has a wide band gap (3.2eV), can only absorb ultraviolet light with a wavelength of less than 378nm, and has a low utilization rate of visible light; and the light-excited carrier pairs are easy to recombine, and the utilization rate of photogenerated electrons is relatively low; under dark conditions ,TiO 2 Unable to generate photogenerated electrons, unable to provide photoelectrochemical cathodic protection for metals

Method used

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  • Photo-anode composite membrane material and application thereof
  • Photo-anode composite membrane material and application thereof
  • Photo-anode composite membrane material and application thereof

Examples

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Embodiment 1

[0043] CdSe / CdS / TiO 2 Preparation of nanocomposite film photoanode materials (refer to figure 1 ), including the following steps:

[0044] Pretreatment of the titanium substrate: firstly, a titanium sheet with a purity of 99.9% and a thickness of 0.1 mm was cut into a size of 30 mm × 10 mm, and then each surface was polished 100 times with 2500 mesh sandpaper to serve as the growth substrate of the composite film; secondly, the Acetone, absolute ethanol and distilled water were used to ultrasonically clean the sample in turn, the cleaning time was 10min, 10min, 30min respectively, and then dried for later use; again, the titanium sheet was placed in a mixed solution at 85°C (the volume ratio was NaOH:Na 2 CO 3 :H 2 O=5:2:100) immersed in 90min, take out and clean with distilled water; finally, in HF solution (volume ratio is HF:H 2 (O=1:5) was etched for 1 min, and after taking it out, it was washed with acetone, absolute ethanol and distilled water in sequence, and dried ...

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Abstract

The invention relates to a photo-anode material, in particular to a photo-anode nano composite membrane material (CdSe/CdS/TiO2 composite membrane photo-anode) prepared by adopting an impregnation-deposition method and a cyclic voltammetry and application. CdSe and CdS nano particles are compounded on the surface of a TiO2 nanowire by adopting the impregnation-deposition method and the cyclic voltammetry to prepare the CdSe/CdS/TiO2 nano composite membrane photo-anode material. When the composite membrane is used as a photo-anode material for cathodic protection, compared with a pure TiO2 material, the photo-anode nano composite membrane material has the advantages that the visible light utilization rate of TiO2 and the separation rate of photo-induced electron-hole pairs are remarkably improved, the electrode potential of Q235 carbon steel is reduced, the corrosion rate is reduced, and the photo-induced cathodic protection performance of TiO2 on Q235 carbon steel is effectively improved.

Description

technical field [0001] The invention relates to photoanode materials, in particular to a photoanode nanocomposite film material (CdSe / CdS / TiO 2 Composite film photoanodes) and applications. Background technique [0002] The marine environment is complex, and seawater is highly corrosive due to the high concentration of chloride ions. Waves, tides and currents will produce low-frequency reciprocating stress to impact metal parts. In addition, marine microorganisms, adherent organisms and their metabolites are harmful, which will directly or indirectly accelerate the corrosion process of marine building materials. Q235 carbon steel is a metal material often used in engineering. Compared with stainless steel, its corrosion resistance is weaker, but its cost is low, so its economical practicability is stronger. The self-corrosion potential of Q235 carbon steel is more negative than that of stainless steel, so it is more difficult to protect it, and the cost of corrosion is hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/14C25D11/26C25D9/04C23C26/00B82Y30/00B82Y40/00
CPCC23F13/14C25D11/26C25D9/04C23C26/00B82Y30/00B82Y40/00
Inventor 王宁王静刘梦楠段继周侯保荣戈成岳张冉舒向泉贺永鹏林建康乔泽
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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