Titanium dioxide nano-tube support with macroscopical shape and preparation method thereof

A technology of titanium dioxide and nanotubes, which is applied in the field of photocatalyst materials with macroscopic shapes and its preparation, can solve the problems of reduced catalyst amount, inconvenient regeneration, and impact on effluent water quality, and achieves the effect of easy separation and reduced dosing cost

Inactive Publication Date: 2009-01-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the existing problems that titanium dioxide nanotubes are difficult to separate and inconvenient to regenerate during the photocatalytic process, and the catalyst will decrease with the loss of effluent during the reaction process, which will affect the quality of effluent water, and provide a macroscopic shape. Titanium dioxide nanotube support and preparation method thereof

Method used

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  • Titanium dioxide nano-tube support with macroscopical shape and preparation method thereof
  • Titanium dioxide nano-tube support with macroscopical shape and preparation method thereof
  • Titanium dioxide nano-tube support with macroscopical shape and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Weigh 1g of P25, add 20mL of 10mol / L aqueous sodium hydroxide solution, stir for 0.5h, transfer to a polytetrafluoroethylene-lined reactor, react at 100°C for 20h, and wash with water until neutral.

[0045] (2) Use 0.1 mol / L hydrochloric acid to adjust the pH value of the solution obtained in step (1) to be less than 3, soak for 0.5 h, and wash with water until neutral.

[0046] (3) Concentrate the solution obtained in step (2) so that its water content is 50%.

[0047] (4) Transfer the concentrated solution prepared in step (3) into a mold, and dry at 60° C. under normal pressure for 7 hours.

[0048] (5) Calcining the solid titania support prepared in step (4), the calcination temperature is 300° C., and the calcination time is 7 hours, to obtain a titania nanotube support with a macroscopic shape.

Embodiment 2

[0050] (1) Weigh 5g of P25, add 50mL of 15mol / L aqueous sodium hydroxide solution, stir for 0.8h, transfer to a polytetrafluoroethylene-lined reactor, react at 100°C for 25h, wash with water until neutral.

[0051] (2) Use 0.5 mol / L hydrochloric acid to adjust the pH value of the solution obtained in step (1) to be less than 3, soak for 0.8 h, and wash with water until neutral.

[0052] (3) Concentrate the solution obtained in step (2) so that its water content is 45%.

[0053] (4) Transfer the concentrated solution prepared in step (3) into a mold, and dry under normal pressure at 70° C. for 5 hours.

[0054] (5) Calcining the solid titania support prepared in step (4), the calcination temperature is 700° C., and the calcination time is 5 h, to obtain a titania nanotube support with a macroscopic shape.

Embodiment 3

[0056] (1) Weigh 7g of P25, add 60mL of 20mol / L aqueous sodium hydroxide solution, stir for 1h, transfer to a reaction kettle lined with polytetrafluoroethylene, react at 120°C for 25h, wash with water until neutral.

[0057] (2) Use 0.5 mol / L sulfuric acid to adjust the pH value of the solution obtained in step (1) to be less than 3, soak for 1 hour, and wash with water until neutral.

[0058] (3) Concentrate the solution obtained in step (2) so that its water content is 60%.

[0059] (4) Transfer the concentrated solution prepared in step (3) into a mold, and dry under normal pressure at 60° C. for 6 hours.

[0060] (5) Calcining the solid titania support prepared in step (4), the calcination temperature is 400°C, and the calcination time is 6h, to obtain a titania nanotube support with a macroscopic shape.

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Abstract

The invention discloses a titanium-oxide nano-pipe carrier with a macro-shape and a preparation method thereof. The specific surface area of the carrier is 150-200m2.g-1, the porosity is 70-85 percent, and the aperture is 50-70nm. The preparation procedures include that (1) the solution is washed by alkaline and acid successively; (2) the solution is condensed, and then filled into a mould with a certain size for drying; (3) the product after being dried is calcined under high temperature and then moulded. The invention overcomes the problems of difficult separation and difficult regeneration during the photocatalysis of titanium-oxide nano-pipe, decrease of catalyst due to catalyst loss accompanying the water discharge and influence to the quality of discharged water; the invention provides a carrier with a macro-shape, and the carrier can be used as the load carrier of metal oxides.

Description

technical field [0001] The invention relates to a photocatalyst material and a preparation method thereof, in particular to a photocatalyst material with a macroscopic shape and a preparation method thereof. Background technique [0002] At present, since photocatalysis can generate hydroxyl radicals with strong oxidation ability, which can degrade pollutants non-selectively, the development of new and efficient photocatalysts has become a hot spot. As a photocatalyst, titanium dioxide nanotubes, as products with a larger specific surface area in the titanium dioxide series, have become a research hotspot for photocatalysts and ozone catalysts. [0003] However, the titanium dioxide nanotubes currently used to study photocatalysts are generally powders. In actual use, powdered titanium dioxide is difficult to separate and inconvenient to regenerate. During the reaction process, the catalyst will decrease with the loss of effluent, which will affect the quality of effluent wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/06B01J35/02
Inventor 季民潘留明
Owner TIANJIN UNIV
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