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In-situ compounded carbon quantum dot - titanium dioxide nano materials with titanium dioxide nanotube array, and preparation method thereof

A nanotube array and titanium dioxide technology, which is applied in the field of titanium dioxide nanotube array in-situ composite carbon quantum dots-titania nanomaterials, can solve the problems of reusable performance and photocatalyst recovery problems, and achieve excellent photocatalytic performance, Effect of low cost and improved photocatalytic efficiency

Active Publication Date: 2018-05-15
SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reusability of carbon quantum dots-titanium dioxide composites prepared by a simple mixing process is questionable
Moreover, most of the photocatalysts obtained by research at present are nanoscale mixed powders, which is still a difficult problem for the recovery of photocatalysts.

Method used

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  • In-situ compounded carbon quantum dot - titanium dioxide nano materials with titanium dioxide nanotube array, and preparation method thereof
  • In-situ compounded carbon quantum dot - titanium dioxide nano materials with titanium dioxide nanotube array, and preparation method thereof
  • In-situ compounded carbon quantum dot - titanium dioxide nano materials with titanium dioxide nanotube array, and preparation method thereof

Examples

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Embodiment 1

[0026] A method for preparing a titania nanotube array in-situ composite carbon quantum dot-titania nanomaterial, comprising the following steps:

[0027] 1) Titanium foils (purity 99.9%, thickness 0.3mm) were ultrasonically washed with acetone (analytical grade), ethanol (analytical grade) and deionized water for 30 min respectively, and after natural drying, two pieces of titanium foils of the same size were used as The anode and cathode use a mixed aqueous solution of 0.1mol / L NaF and 0.5mol / L NaHSO4 as the electrolyte, apply a voltage of 15V through a DC power supply, and react for 360min by anodic oxidation. After the anode reaction, the titanium foil whose surface is an amorphous titanium dioxide nanotube array is obtained, cleaned with deionized water, air-dried, and set aside.

[0028] 2) Dissolve 1.5g of anhydrous citric acid (purity 99.5%), 0.2ml of triethanolamine (analytical pure) and 10ml of butyl titanate (analytical pure) in 60ml of ethanol (analytical pure), fu...

Embodiment 2

[0038] A method for preparing a titania nanotube array in-situ composite carbon quantum dot-titania nanomaterial, comprising the following steps:

[0039] 1) The titanium foil (purity 99.9%, thickness 0.3mm) was ultrasonically washed with acetone (analytical grade), ethanol (analytical grade) and deionized water for 40 minutes, and after natural drying, a titanium foil of the same size (6cm×2cm) was taken. The foil is used as anode and cathode respectively, and the mixed aqueous solution of NaF with a concentration of 0.1mol / L and NaHSO4 with a concentration of 0.5mol / L is used as an electrolyte, and a voltage of 20V is applied through a DC power supply, and the reaction is performed by anodic oxidation for 180min. After the anode reaction, the titanium foil whose surface is an amorphous titanium dioxide nanotube array is obtained, cleaned with deionized water, air-dried, and set aside.

[0040] 2) Dissolve 1g of anhydrous citric acid (purity 99.5%), 0.2ml triethanolamine (ana...

Embodiment 3

[0044] A method for preparing a titania nanotube array in-situ composite carbon quantum dot-titania nanomaterial, comprising the following steps:

[0045] 1) Titanium foil (purity 99.9%, thickness 0.3mm) was ultrasonically washed with acetone (analytical grade), ethanol (analytical grade) and deionized water for 60 minutes, and after natural drying, a titanium foil of the same size (4cm×1cm) was taken. The foil is used as anode and cathode respectively, and the mixed aqueous solution of NaF with a concentration of 0.1mol / L and NaHSO4 with a concentration of 0.5mol / L is used as an electrolyte, and a voltage of 25V is applied through a DC power supply, and the reaction is performed by anodic oxidation for 360min. After the anode reaction, the titanium foil whose surface is an amorphous titanium dioxide nanotube array is obtained, cleaned with deionized water, air-dried, and set aside.

[0046] 2) Dissolve 2.5g of anhydrous citric acid (purity 99.5%), 0.4ml triethanolamine (analy...

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Abstract

The invention discloses an in-situ compounded carbon quantum dot - titanium dioxide nano materials with a titanium dioxide nanotube array, and a preparation method thereof. Firstly, the titanium dioxide nanotube array without a fixed shape is obtained with an anodic oxidation method, and the in-situ compounded carbon quantum dot - titanium dioxide nano materials are obtained with a solvent-thermalmethod. The in-situ compounded carbon quantum dot - titanium dioxide nano materials with the titanium dioxide nanotube array, prepared with the preparation method disclosed by the invention, have obvious photocurrent response, and excellent light degradation property for organic simulated pollutants under excitation by ultraviolet and visible light.

Description

technical field [0001] The invention relates to a titanium dioxide nanotube array in-situ composite carbon quantum dot-titanium dioxide nanometer material, in particular to a titanium dioxide nanocomposite material responsive to visible light. Background technique [0002] In recent years, the problems of environmental pollution and energy shortage have become increasingly prominent, and photocatalytic technology is expected to be one of the most effective means to solve this problem. Photocatalyst is the core of photocatalytic technology. Titanium dioxide (TiO2) is currently the most widely used photocatalyst, which has excellent photocatalytic activity, high chemical stability, non-toxicity, wide sources and low price. However, TiO2 still has many deficiencies as a photocatalyst. First of all, the band gap of TiO2 is too wide (rutile phase, 3.0eV; anatase phase, 3.2eV), and the optically active anatase TiO2 can only absorb ultraviolet light energy with a wavelength less ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C23C18/12B82Y40/00B82Y30/00B01J21/18
CPCB01J21/18B82Y30/00B82Y40/00C23C18/1204C25D11/26
Inventor 李钒田丰刘长军孙秋明李志宏舒展胡名玺
Owner SANITARY EQUIP INST ACAD OF MILITARY MEDICAL SCI PLA
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