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Bi2Se3/TiO2 nano composite film as well as preparation and application thereof

A nano-composite and nano-flower technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of low utilization rate of sunlight, and achieve the promotion of separation efficiency, regular morphology, absorption, etc. wide range of effects

Active Publication Date: 2018-09-18
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is aimed at TiO 2 For the problem of low utilization rate of sunlight, provide a kind of Bi for photogenerated cathodic protection 2 Se 3 / TiO 2 Nanocomposite film and its preparation and application in photogenerated cathodic protection

Method used

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  • Bi2Se3/TiO2 nano composite film as well as preparation and application thereof
  • Bi2Se3/TiO2 nano composite film as well as preparation and application thereof
  • Bi2Se3/TiO2 nano composite film as well as preparation and application thereof

Examples

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Embodiment 1

[0036] 1) Cut a commercially available titanium foil (purity >99.9%) into a titanium substrate sample of 0.3mm×10mm×40mm, and clean it alternately with deionized water and acetone for 10 minutes each time until the titanium substrate is removed. Soluble inorganic or organic matter on the surface of the base sample should be dried at room temperature for later use.

[0037] 2) Dissolve 0.45g of ammonium fluoride (NH 4 F), then add 6ml hydrogen peroxide (H 2 o 2 ) and 6ml concentrated nitric acid (concentrated HNO 3 ), stirred evenly with a glass rod to obtain a polishing solution. Put the treated titanium substrate sample into the polishing solution, and chemically polish until the surface of the titanium substrate sample is uniform, clean and smooth. After taking it out, alternately ultrasonically clean it with deionized water and absolute ethanol three times, each time for 5 minutes, to obtain a pretreated titanium substrate sample. Finally, it was stored in absolute eth...

Embodiment 2

[0046] 1) Cut a commercially available titanium foil (purity >99.9%) into a titanium substrate sample of 0.3mm×10mm×40mm, wash it with deionized water and acetone alternately and ultrasonically for 10 minutes each time, until the titanium is removed Soluble inorganic or organic matter on the surface of the base sample should be dried at room temperature for later use.

[0047] 2) Dissolve 0.45g of ammonium fluoride (NH 4 F), then add 6ml hydrogen peroxide (H 2 o 2 ) and 6ml concentrated nitric acid (concentrated HNO 3 ), stirred evenly with a glass rod to obtain a polishing solution. Put the treated titanium substrate sample into the polishing solution, and chemically polish until the surface of the titanium substrate sample is uniform, clean and smooth. After taking it out, alternately ultrasonically clean it with deionized water and absolute ethanol three times, each time for 5 minutes, to obtain a pretreated titanium substrate sample.

[0048] 3) Preparation of TiO on ...

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Abstract

The invention belongs to the technical field of nanometer materials and particularly relates to a Bi2Se3 / TiO2 nano composite film as well as preparation and application of the Bi2Se3 / TiO2 nano composite film in photoproduction cathodic protection. Preparation of the Bi2Se3 / TiO2 nano composite film comprises the following steps: at first, the anodic oxidation method is adopted to prepare a TiO2 nanotube array film on the surface of a pretreated titanium substrate sample, then, the chemical bath sedimentation method is adopted to prepare Bi2Se3 nanoflowers on the surface of TiO2, and the obtained TiO2 nanotube array film and Bi2Se3 nanoflowers uniformly distributed on the surface of the TiO2 nanotube array film constitute the Bi2Se3 / TiO2 nano composite film with the NN type heterostructure.The ultraviolet visible diffuse reflection absorption spectrum of the Bi2Se3 / TiO2 nano composite film indicates that the Bi2Se3 / TiO2 nano composite film has the visible light absorption effect betterthan that of TiO2. After the Bi2Se3 / TiO2 nano composite film is coupled with stainless steel 304, the open circuit potential-time curve indicates that the open circuit potential of stainless steel 304reaches -996mV, indicating that stainless steel 304 has already entered an excellent cathodic protection state.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a Bi 2 Se 3 / TiO 2 Nanocomposite membranes and their preparation and application in photogenerated cathodic protection. Background technique [0002] Metal corrosion is ubiquitous in all walks of life. It is a destructive erosion caused by physical or chemical reactions between metal materials and the surrounding environment. According to the survey results released by the Chinese Academy of Engineering's major consulting project "Corrosion Status and Control Strategy Research in my country", the total cost of corrosion in my country's entire industry accounted for about 3.34% of the gross domestic product (GDP) in 2014, reaching 2.1 trillion yuan, which shows its importance. anti-corrosion significance. Due to its excellent corrosion resistance, stainless steel is widely used in petrochemical, construction, life, navigation, aviation and other fields. However, stainles...

Claims

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Application Information

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IPC IPC(8): C25D11/26C23C18/12C23C28/04C23F13/12B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C23C18/1204C23C28/042C23F13/12C25D11/26
Inventor 王文成王秀通黄彦良杨黎晖宁晓波路东柱李红玲
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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