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Method for preparing metallic-titanium-particle loading titanium dioxide photocatalyst

A titanium dioxide and photocatalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as difficult degradation, improve degradation rate, improve stability and photocatalytic activity, and be widely used foreground effect

Inactive Publication Date: 2010-03-17
THE FIRST INST OF OCEANOGRAPHY SOA
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Problems solved by technology

However, most of these carriers are used in the photodegradation of organic matter in the air, and it is difficult to apply to the degradation of organic matter in solution due to the influence of solution pH, salt, and oxidizing agents.

Method used

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Examples

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Embodiment Construction

[0014] The present invention will be further illustrated below by specific examples.

[0015] 1. Titanium dioxide sol preparation:

[0016] Measure 67.3ml of absolute ethanol into a dry three-necked flask, then measure 4.8ml of triethanolamine into the three-necked flask, and stir for 0.5h. Put 17.0ml of n-butyl titanate into the partial pressure funnel, slowly add it dropwise into the three-necked flask, and add dropwise while stirring at a rate of 0.13ml / min. Finally, 10ml of absolute ethanol and 1ml of distilled water were added, and the stirring was continued for 0.5h to obtain a light yellow transparent solution, which was aged for 24h to obtain the desired sol solution.

[0017] 2. Load:

[0018] Disperse the titanium particles (40-60 mesh) washed with dilute acid and water and dried into the prepared sol solution, stir for 0.5-2h, dry in the air, repeat dipping-stirring-drying for 2-4 times, and dry in the air Dry at 60-80°C after drying.

[0019] 3. High temperatur...

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Abstract

The invention relates to a method for preparing metallic-titanium-particle loading titanium dioxide photocatalyst. The method comprises the following steps of: preparing titanium dioxide sol by usingthe sol-gel method; then dispersing titanium particles into the prepared titanium dioxide sol, stirring for 0.5-2h, taking out and drying the titanium particles, repeating the previous steps for 2-4 times, and drying the titanium particles at a temperature of 60-80 DEG C; and finally, placing the dried titanium particles loading the titanium dioxide into a muffle for preheating for 1-3h at a temperature of 100-200 DEG C, then raising the temperature to 300-380 DEG C for 3-5h of processing and then to 400-500 DEG C for 2-5h of processing, and obtaining the titanium-particle loading titanium dioxide photocatalyst. The method overcomes the defect that conventional suspending nano titanium dioxide particles are difficult to separate from liquid phase, recover or apply in solution, and the like. By using the metallic titanium particles for loading the nano titanium dioxide particles, the stability of the metallic titanium is combined with the photocatalysis performance of the titanium dioxide, thereby improving the stability and the photocatalysis activity.

Description

technical field [0001] The invention relates to a method for preparing a titanium dioxide photocatalyst supported by metallic titanium particles, and belongs to the technical field of photocatalytic functional materials. Background technique [0002] Photocatalysis is one of the unique properties of nanomaterial semiconductors. Among many photocatalytic materials, nano-titanium dioxide can produce strong oxidative decomposition through photocatalysis due to its high activity, safety and non-toxicity, good chemical stability, insoluble, low cost, no secondary pollution, and simplified process. Among them, anatase titanium dioxide is more widely used in photoactivity, and can effectively treat pesticides, dyes, surfactants, odorous substances, etc. in harmful gases and sewage, and has great application potential in pollution control. Therefore, It is recognized by researchers as the most promising environment-friendly photocatalytic material in the field of environmental gove...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/08
Inventor 赵美丽蒋凤华周文辉韩彬庄峙厦王小如黎先春
Owner THE FIRST INST OF OCEANOGRAPHY SOA
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