Method for preparing modified titanium oxide sol, powder and film

A technology of titanium oxide sol and powder, which is applied in the field of preparation of titanium oxide photocatalysts, can solve the problems of reduced photocatalytic effect, inapplicability, and difficult industrial application, and achieve the goal of avoiding high-temperature calcination heat treatment process and enhancing photocatalytic effect Effect

Inactive Publication Date: 2007-05-16
ZHEJIANG UNIV
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Problems solved by technology

However, the high-temperature calcination in the above process limits the application of titanium oxide, so that it can only appear in the form of film or powder, and cannot be applied to heat-labile substrates (such as plastics) or areas that are difficult to heat (such as The walls of buildings); in addition, the high-temperature heat treatment process will make the titanium oxide grains grow, the quantum effect will be weakened, and the photocatalytic effect will be reduced
[0004] In

Method used

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Embodiment Construction

[0022] The present invention will be described in detail below through specific embodiments.

[0023] The method for preparing modified titanium oxide sol, powder and film in this specific embodiment includes the following steps:

[0024] (1) Add butyl titanate to 1-10 times (m / m) of the alcohol diluent solvent under stirring conditions, and stir evenly;

[0025] (2) Add the mixed solution obtained in step (1) dropwise to a hydrolysis solvent of 1 to 500 times (m / m) at a temperature of 5 to 95°C in a water bath, and stir for 0.5 to 5 hours;

[0026] (3) uniformly dissolving the nitrogen-containing compound into the sol obtained in step (2);

[0027] (4) The sol obtained in step (3) is allowed to stand and age for 1 hour to 15 days, until blue-white and transparent, to obtain an in-situ nitrogen-doped modified titanium oxide sol.

[0028] (5) Take the in-situ nitrogen-doped modified titanium oxide sol obtained in step (4) and dry it into powder at room temperature or below 100°C to...

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Abstract

The invention discloses a preparing method of modified titanium oxide sol, powder and film, which comprises the following steps: (1) adding at least one titanium tetrachloride, titanium sulfate or butyl titanate in the alcohol diluent; (2) dripping the composite solution in the step (1) into hydrolytic solvent; (3) dissolving nitrogen-containing compound in the sol evenly; (4) stewing the sol; aging until producing blue white transparent sol; (5) drying the sol into dried powder to obtain titanium oxide powder; (6) filming the sol in the step (4) to form titanium oxide film.

Description

Technical field [0001] The invention relates to a method for preparing a titanium oxide photocatalyst, and more specifically, to a method for preparing a modified titanium oxide sol, powder and film. Background technique [0002] As an ideal semiconductor photocatalyst, titanium oxide has good application prospects in solar energy storage and utilization, photochemical conversion, and environmental treatment of organic pollutants. If titanium oxide photocatalyst powder is added to the ceramic glaze, the resulting product can have antibacterial and self-cleaning effects. [0003] Pure titanium oxide has a large band gap, which requires ultraviolet light to be excited, and the light utilization rate is low. Many researchers introduce various ions (including metal ions such as Fe and La and non-metal ions such as N and C) into the solution through wet chemical processes, and then make the metal or non-metal ions enter the crystal of titanium oxide through subsequent high-temperature...

Claims

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Application Information

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IPC IPC(8): C01G23/053B01J21/06
Inventor 高基伟申乾宏杨辉
Owner ZHEJIANG UNIV
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