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Method for preparing Magneli-phase titanium oxide mesoporous surface

A titanium oxide and mesoporous technology, which is applied in the field of preparation of Magneli phase titanium oxide mesoporous surface, can solve the problems of poor bonding force of load substrates, secondary pollution of water body, small contact area, etc., so as to shorten the preparation cycle and reduce the The effect of high production cost and safety

Inactive Publication Date: 2019-05-03
GUANGDONG ROI OPTOELECTRONICS TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the suspension-type titanium dioxide catalyst has the following disadvantages: a) It is difficult to separate and recycle the catalyst powder, and it is easy to cause secondary pollution of the water body; b) The titanium dioxide powder cannot be reused; c) The stability is poor, and it is easy to block the filter device
The disadvantages of the supported photocatalytic network are: a) the dispersion of titanium dioxide is reduced, and the contact area with the reactant is small; b) the supporting substrate is often unable to be heat-treated and cannot form an effective composite crystal structure; c) the binding force of the supporting substrate is not good, Easy to be polluted by oil, and the service life is not high

Method used

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  • Method for preparing Magneli-phase titanium oxide mesoporous surface
  • Method for preparing Magneli-phase titanium oxide mesoporous surface
  • Method for preparing Magneli-phase titanium oxide mesoporous surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Titanium oxide Ti with Magneli phase prepared under the discharge time of 40min and discharge power of 420W 4 o 7 Titanium mesh on a mesoporous surface.

[0032] Drop 4 mL of 0.1 mol / L nitric acid solution into 50 mL of deionized water, and stir thoroughly to obtain an electrolyte. Drop 10 mL of 0.1 mol / L nitric acid solution into 60 mL of deionized water, and stir well to obtain a buffer solution.

[0033] Such as figure 2 As shown, two titanium rod cathodes are symmetrically placed on both sides of the titanium mesh anode to form a parallel discharge system. The diameter of the two titanium rod cathodes used is 4mm and the length is 20cm. Put two titanium rod cathodes into the corundum tube, and only the conical tip part with a length of 0.8cm is not covered by the corundum tube. The specification of the titanium mesh anode used is 0.1*2*2cm 3 , the titanium grid hole size is 2*3mm 2 , the grid thickness is 1mm.

[0034] The electrolyte is poured into the elect...

Embodiment 2

[0037] Titanium oxide Ti with Magneli phase prepared under the discharge time of 60min and discharge power of 420W 4 o 7 Titanium mesh on a mesoporous surface.

[0038] Drop 4 mL of 0.1 mol / L nitric acid solution into 50 mL of deionized water, and stir thoroughly to obtain an electrolyte. Drop 10 mL of 0.1 mol / L nitric acid solution into 60 mL of deionized water, and stir well to obtain a buffer solution.

[0039] Such as figure 2 As shown, two titanium rod cathodes are symmetrically placed on both sides of the titanium mesh anode to form a parallel discharge system. The diameter of the two titanium rod cathodes used is 4mm and the length is 20cm. Put two titanium rod cathodes into the corundum tube, and only the conical tip part with a length of 0.8cm is not covered by the corundum tube. The specification of the titanium mesh anode used is 0.1*2*2cm 3 , the titanium grid hole size is 2*3mm 2 , the grid thickness is 1mm.

[0040] The electrolyte is poured into the elect...

Embodiment 3

[0043] Titanium oxide Ti with Magneli phase prepared under the discharge time of 80min and discharge power of 420W 4 o 7 Titanium mesh on a mesoporous surface.

[0044] Drop 4 mL of 0.1 mol / L nitric acid solution into 50 mL of deionized water, and stir thoroughly to obtain an electrolyte. Drop 10 mL of 0.1 mol / L nitric acid solution into 60 mL of deionized water, and stir well to obtain a buffer solution.

[0045] Such as figure 2 As shown, two titanium rod cathodes are symmetrically placed on both sides of the titanium mesh anode to form a parallel discharge system. The diameter of the two titanium rod cathodes used is 4mm and the length is 20cm. Put two titanium rod cathodes into the corundum tube, and only the conical tip part with a length of 0.8cm is not covered by the corundum tube. The specification of the titanium mesh anode used is 0.1*2*2cm 3 , the titanium grid hole size is 2*3mm 2 , the grid thickness is 1mm.

[0046] The electrolyte is poured into the elect...

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Abstract

The invention relates to the technical field of inorganic nano material science, in particular to a method for preparing a Magneli-phase titanium oxide mesoporous surface. The method comprises the steps: immersing a titanium substrate as an anode in an electrolyte, then applying a certain voltage between a cathode and the anode, performing cathodic glow discharge in the electrolyte so as to generate plasma, electrolyzing water through the plasma so as to generate hydrogen atoms and high-energy electrons, performing in situ hydrogenation reduction treatment on substances near the plasma, and inducing Mgeneli-phase titanium oxide mesopores to grow gradually out on the surface of the titanium substrate under the action of a synergistic effect of plasma reduction treatment and an anodic oxidation reaction, wherein after a specified discharge time is finished, a gray Mgeneli-phase titanium oxide mesoporous layer is formed on the surface of the titanium substrate of a certain thickness so asto obtain the Magneli-phase titanium oxide mesoporous surface. Induced growth of the Magneli-phase titanium oxide mesoporous structure is achieved on the surface of the titanium substrate through theaction of a synergistic effect of plasma reduction treatment and an anodic oxidation reaction.

Description

technical field [0001] The invention relates to the technical field of inorganic nanomaterials, in particular to a method for preparing a Magneli phase titanium oxide mesoporous surface. Background technique [0002] As a typical semiconductor photocatalyst, titanium dioxide is widely used in photocatalytic hydrogen production, solar cells, sewage treatment and other fields because of its green, cheap and stable chemical properties. 1-3 . Like most semiconductor catalysts, titanium dioxide photocatalysts only absorb ultraviolet light and have extremely low utilization rates for visible light. At present, many methods can reduce titanium dioxide to black or gray titanium dioxide, so as to achieve enhanced visible light absorption and visible light catalytic ability. These methods include hydrogenation treatment, aluminothermic reaction, laser plasma treatment, etc. 4-6 . However, the above method has the disadvantages of high energy consumption and complicated operation. ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/10B01J37/34
Inventor 曾和平冯光
Owner GUANGDONG ROI OPTOELECTRONICS TECH CO LTD
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