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Titanium dioxide nanoplate and synthesizing method thereof

A technology of titanium dioxide and synthesis method, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., to achieve the effects of low price, easy availability of raw materials, and low synthesis cost

Inactive Publication Date: 2009-06-24
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the exposed titanium dioxide sheet structure with a high activity surface ((001) surface) (Ulrike Diebold, The surface science of titanium dioxide, Surf.Sci.Rep, 2003, 48, 53)

Method used

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  • Titanium dioxide nanoplate and synthesizing method thereof
  • Titanium dioxide nanoplate and synthesizing method thereof
  • Titanium dioxide nanoplate and synthesizing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Measure 5ml of tetrabutyl titanate and 0.4ml of hydrofluoric acid into the reaction axe, react at 180°C for 24 hours, take out the sample and wash it twice with distilled water and ethanol, then wash it with NaOH solution for 10 times, and finally wash it with water for 3 times time, and then dry.

[0031] 2) Preparation of nano-titanium dioxide solution: Weigh 60 mg of titanium dioxide nanosheets prepared by the above method, prepare a 0.06 g / L solution with distilled water, and measure 3 mL of the solution into a photocatalytic reactor.

[0032] 3) Put the photocatalytic reactor equipped with the nano-titanium dioxide solution under an ultraviolet lamp, and add 50 μL, 1 mmol / L methyl orange solution to conduct a photocatalytic test.

[0033] The product is characterized by XRD, SEM, TEM as TiO2 flake structure. figure 1 5ml tetrabutyl titanate and 0.4ml hydrofluoric acid were put into the reaction axe and reacted at 180°C for 24h to obtain the X-ray powder diffrac...

Embodiment 2

[0035] Similar to Example 1, the difference is that the volume ratio of tetrabutyl titanate to hydrofluoric acid is 20:1, the reaction temperature is 230° C., and the reaction time is 10 h.

Embodiment 3

[0037] 1) Measure 5ml of tetrabutyl titanate and 0.8ml of hydrofluoric acid into the reaction kettle, react at 180°C for 24 hours, take out the sample and wash it with distilled water and ethanol for 3 times, then wash it with NaOH solution for 8 times, and finally wash it with water for 4 hours time, and then dry.

[0038] 2) Preparation of nano-titanium dioxide solution: Weigh 60 mg of titanium dioxide nanosheets prepared by the above method, prepare a 0.06 g / L solution with distilled water, and measure 3 mL of the solution into a photocatalytic reactor.

[0039] 3) Put the photocatalytic reactor equipped with the nano-titanium dioxide solution under an ultraviolet lamp, and add 50 μL, 1 mmol / L methyl orange solution to conduct a photocatalytic test. It takes about 3100s to prepare the sample in Example 2.

[0040] The product was characterized as TiO by XRD, SEM, TEM 2 flaky structure. Figure 5 Give 5ml tetrabutyl titanate and 0.4ml hydrofluoric acid into the reaction a...

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Abstract

The invention discloses titanium dioxide nano sheets and a method for synthesizing the same, and relates to a titanium dioxide nano material. The invention provides titanium dioxide nano sheets which are low in cost, high in catalytic activity and good in circularity and a method for synthesizing the same. The nano sheets are mainly in square rectangular shapes. The average thickness of the titanium dioxide nano sheets is 5 to 10nm. The average length of the titanium dioxide nano sheets is 30 to 150nm. The average width of the titanium dioxide nano sheets is 30 to 150nm. The top and bottom surfaces of the titanium dioxide nano sheets are high-activity surfaces (001) and exposed. The catalytic efficiency and the circularity of the titanium dioxide nano sheets are higher than those of commercial titanium dioxide (P25). The synthesis method comprises: placing tetrabutyl titanate and hydrofluoric acid into a reaction kettle and heating the mixture at 170 to 250 DEG C; keeping the temperature for 10 to 36 hours and cooling the mixture to room temperature; and taking out a sample, washing the sample with distilled water, ethanol, NaOH solution and water, and drying the sample to obtain the target product.

Description

technical field [0001] The invention relates to a titanium dioxide nanometer material, in particular to a low-cost titanium dioxide nanosheet with high-efficiency photocatalytic activity under ultraviolet light and a synthesis method thereof. Background technique [0002] Photocatalysis is a hot topic in environmental science and new energy development in the 21st century. It has far-reaching significance for developing new energy, changing energy structure, eliminating environmental pollution and protecting the ecological environment. At present, most photocatalysts are mainly chalcogenide semiconductors. For semiconductors, there is a band gap between the valence band and the conduction band. When the energy of absorbed light is greater than its own band gap, the valence band Electrons are excited by light and jump to the conduction band, thereby forming photogenerated electrons in the conduction band and holes in the valence band. At this time, the dissolved oxygen adsorb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 谢兆雄韩锡光匡勤金明尚郑兰荪
Owner XIAMEN UNIV
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