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A method for one-step synthesis of miscible-phase and exposed high-active face titania

A titanium dioxide, high-activity technology, applied in the fields of titanium dioxide, titanium oxide/hydroxide, nanotechnology for materials and surface science, etc., can solve the problems of difficult large-scale application, high toxicity, etc. The effect of morphology rules and simple methods

Inactive Publication Date: 2015-12-09
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of titanium dioxide based on hydrofluoric acid is difficult for large-scale application because of its high toxicity.
Therefore, it remains a challenge to find simple and green methods to synthesize titania with exposed high-energy faces.

Method used

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  • A method for one-step synthesis of miscible-phase and exposed high-active face titania
  • A method for one-step synthesis of miscible-phase and exposed high-active face titania
  • A method for one-step synthesis of miscible-phase and exposed high-active face titania

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for synthesizing mixed-phase and exposed high-activity surface titanium dioxide in one step, comprising the steps of:

[0021] (1) Weigh 3.86g of titanium trichloride solution (mass fraction is 20%, containing 3% hydrochloric acid), add to 76mL of distilled water, stir to obtain a clear solution;

[0022] (2) Add 0.044g ascorbic acid in step (1), the molar ratio of ascorbic acid to titanium trichloride is 0.05, and at normal temperature and pressure, continue stirring for 10min to obtain a clear solution;

[0023] (3) Transfer the clear solution obtained in step (2) to a 100mL polytetrafluoroethylene stainless steel autoclave, raise it from room temperature to 180°C at a rate of 5°C / min, and keep it at this temperature for 10h;

[0024] (4) After the suspension obtained in step (3) is cooled to room temperature, centrifuge at a speed of 4200r / min for 10min, then wash with distilled water, repeat three times, and place the obtained solid in a vacuum drying oven ...

Embodiment 2

[0026] A method for synthesizing mixed-phase and exposed high-activity surface titanium dioxide in one step, comprising the steps of:

[0027] (1) Weigh 3.86g of titanium trichloride solution (mass fraction is 20%, containing 3% hydrochloric acid), add to 76mL of distilled water, stir to obtain a clear solution;

[0028] (2) Add 0.11g of ascorbic acid to step (1), the molar ratio of ascorbic acid to titanium trichloride is 0.125, and at normal temperature and pressure, continue stirring for 10min to obtain a clear solution;

[0029] (3) Transfer the clear solution obtained in step (2) to a 100mL polytetrafluoroethylene stainless steel autoclave, raise it from room temperature to 180°C at a rate of 5°C / min, and keep it at this temperature for 10h;

[0030] (4) After the suspension obtained in step (3) is cooled to room temperature, centrifuge at a speed of 4200r / min for 10min, then wash with distilled water, repeat three times, and place the obtained solid in a vacuum drying ov...

Embodiment 3

[0032] A method for synthesizing mixed-phase and exposed high-activity surface titanium dioxide in one step, comprising the steps of:

[0033] (1) Weigh 3.86g of titanium trichloride solution (mass fraction is 20%, containing 3% hydrochloric acid), add to 76mL of distilled water, stir to obtain a clear solution;

[0034] (2) Add 0.22g ascorbic acid in step (1), the molar ratio of ascorbic acid to titanium trichloride is 0.25, and at normal temperature and pressure, continue stirring for 10min to obtain a clear solution;

[0035] (3) Transfer the clear solution obtained in step (2) to a 100mL polytetrafluoroethylene stainless steel autoclave, raise it from room temperature to 180°C at a rate of 5°C / min, and keep it at this temperature for 10h;

[0036] (4) After the suspension obtained in step (3) is cooled to room temperature, centrifuge at a speed of 4200r / min for 10min, then wash with distilled water, repeat three times, and place the obtained solid in a vacuum drying oven a...

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Abstract

The invention discloses a one-step synthesis method of mixed-phase titanium dioxide with exposed high-activity surfaces, which comprises the following steps: (1) weighing a certain amount of titanium trichloride solution, adding into distilled water, and stirring; (2) weighing a certain amount of ascorbic acid solid, adding into the solution, and stirring until the solid is completely dissolved; (3) transferring the solution into a 100mL polytetrafluoroethylene-stainless steel high-pressure reaction kettle, and reacting at 180 DEG C for 10 hours; and (4) after the reaction system is naturally cooled to room temperature, repeatedly centrifuging and washing with distilled water, placing the obtained precipitate in a vacuum drying oven, and drying at 100 DEG C for 10 hours to obtain the product. The method disclosed by the invention is simple and environment-friendly, and the time consumed in the synthesis process is short.

Description

technical field [0001] The invention relates to a method for one-step synthesis of mixed-phase and exposed high-activity surface titanium dioxide, which belongs to the technical field of inorganic functional materials. Background technique [0002] Nanoscale titanium dioxide (TiO 2 ) has been extensively studied due to its special properties and potential applications in the fields of environment and energy. At present, nano-titanium dioxide plays an important role in the fields of photocatalysis, photovoltaic cells, dye-sensitized solar cells, and lithium-ion batteries. [0003] The performance of titanium dioxide depends on factors such as crystal structure, morphology, specific surface area and size. Titanium dioxide has three most common crystalline phases: anatase (A), rutile (R) and brookite (B). All three crystal structures are composed of twisted TiO 6 Octahedral composition, the only difference lies in the way it is connected. The results show that compared wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y30/00B82Y40/00
Inventor 韩煦任海涛王为民李约翰
Owner TIANJIN POLYTECHNIC UNIV