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Preparation method of high-performance porous photocatalytic ball

A photocatalytic, high-performance technology, applied in the field of photocatalysis, can solve the problems of easy deactivation of photocatalysts, and achieve the effect of solving easy oxidation and easy hydrolysis, improving performance and improving service life.

Inactive Publication Date: 2020-05-19
绍兴市梓昂新材料有限公司
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Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a method for preparing a high-performance porous photocatalytic sphere, which solves the problem that the existing photocatalyst is easily deactivated, and uses sodium sulfite and nano-titanium dioxide to form an oxygen-like system, which greatly Enhance the performance of surface titanium dioxide

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  • Preparation method of high-performance porous photocatalytic ball

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preparation example Construction

[0016] A method for preparing a high-performance porous photocatalytic sphere, comprising the steps of:

[0017] Step 1, stirring and mixing polyvinylpyrrolidone powder and sodium sulfite powder under a nitrogen environment to form a mixed solid; the stirring speed of stirring and mixing is 500-1500r / min, and the mass ratio of polyvinylpyrrolidone powder and sodium sulfite powder is 3:2-5 ;Polyvinylpyrrolidone and sodium sulfite are physically stirred to form a good mixing effect, and the polyvinylpyrrolidone is evenly dispersed between the sodium sulfite powder to form a good dispersion;

[0018] Step 2, add oxygen-free ethanol to the mixed solid and stir to form a viscous substance with uniform viscosity; the stirring speed is 1000-2000r / min, the temperature is 0-5°C, and the amount of oxygen-free ethanol added is polyethylene 30-50% of the quality of pyrrolidone; oxygen-free ethanol is added in polyvinyl pyrrolidone, polyvinyl pyrrolidone can be dissolved, and the dissolved...

Embodiment 1

[0023] A method for preparing a high-performance porous photocatalytic sphere, comprising the steps of:

[0024] Step 1, stirring and mixing polyvinylpyrrolidone powder and sodium sulfite powder under a nitrogen environment to form a mixed solid; the stirring speed of stirring and mixing is 500r / min, and the mass ratio of polyvinylpyrrolidone powder and sodium sulfite powder is 3:2;

[0025] Step 2, add oxygen-free ethanol to the mixed solids and stir to form a viscous substance with uniform consistency; the stirring speed is 1000r / min, the temperature is 0°C, and the amount of oxygen-free ethanol added is 1 / 2 of the mass of polyvinylpyrrolidone 30%;

[0026] Step 3: put the viscous material into the mold, cure at constant temperature to form prefabricated balls, soak the prefabricated balls in oxygen-free ethanol, take out and dry to form porous balls; constant temperature curing is carried out in nitrogen environment, and the temperature of constant temperature curing is 80°...

Embodiment 2

[0030] A method for preparing a high-performance porous photocatalytic sphere, comprising the steps of:

[0031] Step 1, stirring and mixing polyvinylpyrrolidone powder and sodium sulfite powder under a nitrogen environment to form a mixed solid; the stirring speed of stirring and mixing is 1500r / min, and the mass ratio of polyvinylpyrrolidone powder and sodium sulfite powder is 3:5;

[0032] Step 2, add oxygen-free ethanol to the mixed solids and stir to form a viscous substance with uniform consistency; the stirring speed is 2000r / min, the temperature is 5°C, and the amount of oxygen-free ethanol added is 1 / 4 of the quality of polyvinylpyrrolidone 50%;

[0033] Step 3, put the viscous material into the mold, solidify at a constant temperature to form a prefabricated ball, soak the prefabricated ball in oxygen-free ethanol, take it out and dry it to form a porous ball; the constant temperature curing is carried out in an argon environment, and the temperature of the constant ...

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Abstract

The invention discloses a preparation method of a high-performance porous photocatalytic ball. The method comprises the following steps: 1, stirring and mixing polyvinylpyrrolidone powder and sodium sulfite powder in a nitrogen environment to form a mixed solid; 2, adding anaerobic ethanol into the mixed solid, and stirring the mixture to form a viscous material with uniform viscosity; 3, puttingthe viscous material into a mold, carrying out constant-temperature curing to form a prefabricated ball, soaking the prefabricated ball into anaerobic ethanol, taking out the prefabricated ball, and performing drying to form a porous ball; 4, uniformly spraying the titanium alcohol solution on the porous spheres to form a liquid film, performing drying to obtain titanium film porous spheres, and performing repeating for 5-20 times to obtain prefabricated photocatalytic spheres; and 5, putting the prefabricated photocatalytic ball into a sealed reaction kettle, introducing nitrogen with water vapor, and standing at a constant temperature for 2-4 hours to obtain the porous photocatalytic ball. The problem that an existing photocatalyst is prone to inactivation is solved, sodium sulfite and nano titanium dioxide are combined to form an anoxic-like system, and the performance of surface titanium dioxide is greatly improved.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and relates to a photocatalysis ball, in particular to a preparation method of a high-performance porous photocatalysis ball. Background technique [0002] In recent years, semiconductor photocatalysts have important applications in the field of environmental pollution control. As a representative photocatalyst, titanium dioxide is currently a widely used photocatalyst. In theory, titanium dioxide has the advantages of high photocatalytic activity, good stability, non-toxicity, and low cost. In addition, the photocatalytic reaction of titanium dioxide can be carried out under normal temperature and pressure conditions. [0003] However, the electrons and holes generated by the photoexcitation of titanium dioxide photocatalysts are very easy to recombine, resulting in a low quantum yield of light absorption. question. Contents of the invention [0004] Aiming at the problems in the prior art, th...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J35/08
CPCB01J31/38B01J35/51B01J35/39
Inventor 祁云永
Owner 绍兴市梓昂新材料有限公司
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