A preparing method of a graphene sensitized CdSe/TiO2 nanotube composite membrane

A nanotube composite and graphene technology, applied in nanotechnology, electrolytic inorganic material coating, electrolytic coating, etc., can solve problems such as low photoelectric efficiency, fast recombination of photogenerated electron-hole pairs, and inability to effectively use visible light. Achieve the effect of complete and uniform coating and avoid corrosion

Active Publication Date: 2014-11-26
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, TiO 2 There are some technical problems in the actual application process: (1) When the light is illuminated, the TiO 2 Due to the limitation of wide bandgap (3.2eV), it can only absorb ultraviolet light with a wavelength less than 380nm, and most of the visible light cannot be effectively used, and the photoelectric efficiency is low
(2) When the light turns into a dark state, the generated photogenerated electron-hole pairs recombine quickly, which cannot provide long-term cathodic protection for metals

Method used

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  • A preparing method of a graphene sensitized CdSe/TiO2 nanotube composite membrane
  • A preparing method of a graphene sensitized CdSe/TiO2 nanotube composite membrane
  • A preparing method of a graphene sensitized CdSe/TiO2 nanotube composite membrane

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Effect test

Embodiment 1

[0042] Take a rectangular pure titanium foil with a thickness of 0.1 mm as a sample, which is 15 mm long and 10 mm wide. The surface of the sample was sequentially polished with 400-1500 grit sandpaper, and then ultrasonically cleaned in acetone, absolute ethanol and deionized water for 10 minutes.

[0043] Measure 1 mL of hydrofluoric acid into 100 mL of deionized water to make a hydrofluoric acid solution. At room temperature, with the cleaned titanium foil substrate as the anode and the platinum sheet as the cathode, anodize at 30V for 30min in the above mixed solution. Then the sample was placed in a muffle furnace and calcined at 450 °C for 2 hours, and then cooled to room temperature with the furnace, that is, TiO was prepared on the surface of the titanium foil substrate. 2 nanotube array film.

[0044] Using cyclic voltammetry deposition method, first on TiO 2 Graphene quantum dots are deposited on the surface of the nanotube array film. 0.1 g of graphite oxide was...

Embodiment 2

[0051] Graphene-sensitized CdSe / TiO 2 Preparation method of nanotube composite film:

[0052] Take a rectangular pure titanium foil with a thickness of 0.1 mm as a sample, which is 15 mm long and 10 mm wide. The surface of the sample was sequentially polished with 400-1500 grit sandpaper, and then ultrasonically cleaned in acetone, absolute ethanol and deionized water for 10 minutes.

[0053] Measure 1 mL of hydrofluoric acid into 100 mL of deionized water to make a hydrofluoric acid solution. At room temperature, with the cleaned titanium foil substrate as the anode and the platinum sheet as the cathode, anodize at 30V for 30min in the above mixed solution. Then the sample was placed in a muffle furnace and calcined at 450 °C for 2 hours, and then cooled to room temperature with the furnace, that is, TiO was prepared on the surface of the titanium foil substrate. 2 nanotube array film.

[0054] Using cyclic voltammetry deposition method, first on TiO 2 Graphene quantum d...

Embodiment 3

[0058] Graphene-sensitized CdSe / TiO 2 Preparation method of nanotube composite film:

[0059] Take a rectangular pure titanium foil with a thickness of 0.1 mm as a sample, which is 15 mm long and 10 mm wide. The surface of the sample was sequentially polished with 400-1500 grit sandpaper, and then ultrasonically cleaned in acetone, absolute ethanol and deionized water for 10 minutes.

[0060] Measure 1 mL of hydrofluoric acid into 100 mL of deionized water to make a hydrofluoric acid solution. At room temperature, with the cleaned titanium foil substrate as the anode and the foil as the cathode, anodize at 30V for 30min in the above mixed solution. Then the sample was placed in a muffle furnace and calcined at 450 °C for 2 hours, and then cooled to room temperature with the furnace, that is, TiO was prepared on the surface of the titanium foil substrate. 2 nanotube array film.

[0061] Using cyclic voltammetry deposition method, first on TiO 2 Graphene quantum dots are de...

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Abstract

The invention relates to a nanotube composite membrane and particularly relates to a preparing method of a graphene sensitized CdSe/TiO2 nanotube composite membrane. The method includes: a step of performing anodic oxidation and then calcination by adopting titanium foil as a substrate, adopting a hydrofluoric acid solution as an electrolyte solution and adopting platinum as a counter electrode so as to prepare a TiO2 nanotube array membrane on the surfaces of titanium; a step of depositing graphene quantum dots onto the surfaces of the TiO2 nanotube array membrane by adoption of a cyclic voltammetry deposition method, namely a step of depositing graphene onto the surfaces of the TiO2 nanotube array membrane to prepare a graphene/TiO2 composite membrane by adopting a prepared graphene oxide solution as an electrolyte solution, adopting platinum as a counter electrode and adopting a saturated calomel electrode (SCE) as a reference electrode; and a step of depositing CdSe quantum dots onto the surfaces of the prepared graphene/TiO2 composite membrane, namely a step of depositing CdSe onto the surfaces of the graphene/TiO2 composite membrane to prepare the graphene sensitized CdSe/TiO2 nanotube composite membrane by adopting a mixed solution of SeO2, CdSO4 and sulfuric acid as an electrolyte solution, adopting platinum as a counter electrode and adopting a saturated calomel electrode (SCE) as a reference electrode.

Description

technical field [0001] The invention relates to a nanotube composite film, in particular to a graphene-sensitized CdSe / TiO 2 Preparation method of nanotube composite film. Background technique [0002] TiO 2 Due to its excellent chemical properties and photoelectrochemical properties, its preparation has attracted great attention in the protection of metals. The basic principle is: under light conditions, TiO 2 is excited and generates photo-generated electrons, and the photo-generated electrons from TiO 2 The surface is transferred to the metal, which makes the potential of the metal shift negatively and is lower than its self-corrosion potential, thus protecting the metal. Compared with traditional cathodic protection methods, this technology utilizes TiO 2 The photoelectric effect does not need to sacrifice the anode, nor does it need to consume electric energy, and the cost is lower, showing attractive application prospects. However, TiO 2 There are some technical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C25D9/08B82Y40/00
Inventor 李红侯保荣王秀通
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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