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A composite photocatalytic diatom plate and its preparation method

A technology of composite photocatalytic diatom board and photocatalytic diatom board, which is applied in the field of photocatalysis, can solve the problems of easy falling off of nano photocatalyst particles and poor photocatalytic ability, and achieve strong binding force, low production cost and easy operation. simple effect

Inactive Publication Date: 2020-02-14
胡建农
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nano-photocatalyst particles in these composite sheets are easy to fall off, resulting in poor photocatalytic ability.

Method used

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  • A composite photocatalytic diatom plate and its preparation method
  • A composite photocatalytic diatom plate and its preparation method

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preparation example Construction

[0035] The invention provides a method for preparing a composite photocatalytic diatom plate, comprising the following steps:

[0036] (1) mixing alcohol, retarder and soluble titanium source to obtain the first mixed solution;

[0037] (2) mixing alcohol, water and soluble iron source, adjusting the pH value of the mixed solution to 1-3 with acid to obtain the second mixed solution;

[0038] (3) adding the second mixed solution to the first mixed solution for sol-gelling reaction to obtain Fe-TiO 2 gel;

[0039] (4) the diatom plate in the Fe-TiO 2 impregnated and pulled in the gel to obtain Fe-TiO coated 2 Diatom sheets of gel films;

[0040] (5) Coating the Fe-TiO 2 The diatom plate of the gel film is dried and calcined in sequence to obtain a composite photocatalytic diatom plate;

[0041] The steps (1) and (2) are not limited by time sequence.

[0042] In the present invention, the alcohol, the retarder and the soluble titanium source are mixed to obtain the first ...

Embodiment 1

[0061] (1) At room temperature, mix 100 mL of absolute ethanol with 10 mL of acetic acid, stir magnetically for 15 minutes, and then add 5 mL of tetrabutyl titanate (TBOT) dropwise through a peristaltic pump to obtain the first mixed solution;

[0062] (2) At room temperature, mix 60mL of deionized water and 30mL of absolute ethanol, and after magnetically stirring for 15min, based on the molar amount of tetrabutyl titanate (TBOT) added in step (1), according to n(Fe) / n(Ti) is a ratio of 0.5%, 7.5mL ferric chloride solution (0.01mol / L) is added through a peristaltic pump, and then the pH value of the solution is adjusted to 2 with concentrated hydrochloric acid to obtain the second mixed solution;

[0063] (3) Slowly add the second mixed solution to the first mixed solution through a peristaltic pump, after the dropwise addition is completed, stir and react at room temperature for 1 h to form Fe-TiO 2 sol, and then carry out gelation reaction at room temperature, and form Fe-...

Embodiment 2

[0069] (1) At room temperature, mix 100 mL of absolute ethanol with 15 mL of acetic acid, stir magnetically for 15 minutes, and then add 7 mL of tetrabutyl titanate (TBOT) dropwise through a peristaltic pump to obtain the first mixed solution;

[0070] (2) At room temperature, mix 70mL of deionized water and 35mL of absolute ethanol, and after magnetically stirring for 15min, based on the molar amount of tetrabutyl titanate (TBOT) added in step (1), according to n(Fe) / n(Ti) is a ratio of 1.5%, 31.5mL ferric chloride solution (0.01mol / L) is added through a peristaltic pump, and then the pH value of the solution is adjusted to 2 with concentrated hydrochloric acid to obtain the second mixed solution;

[0071] (3) Slowly add the second mixed solution to the first mixed solution through a peristaltic pump, after the dropwise addition is completed, stir and react at room temperature for 1 h to form Fe-TiO 2 sol, and then gelatinized at room temperature to form Fe-TiO after 18 hour...

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Abstract

The invention provides a composite photocatalytic diatomaceous plate and a preparation method thereof. Firstly, Fe-TiO2 gel is prepared, a diatomaceous plate is dipped and pulled in the Fe-TiO2 gel, the diatomaceous plate covered with a Fe-TiO2 gel film is obtained and finally dried and calcined, the Fe-TiO2 gel covering the surface of the diatomaceous plate is dewatered and crystalized, and the composite photocatalytic diatomaceous plate is obtained. The provided preparation method is simple to operate, low in production cost and beneficial to industrialization. The obtained composite photocatalytic diatomaceous plate has high adsorption and capturing capability for pollutants and has good photocatalytic activity, and a photocatalyst on the surface of the diatomaceous plate is not prone to peeling.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a composite photocatalytic diatom plate and a preparation method thereof. Background technique [0002] Photocatalytic technology can use light energy to degrade and mineralize various pollutants in water and air, and is an ideal environmental pollution control technology. Nano TiO 2 As a representative semiconductor photocatalytic material, the photogenerated electron-hole pairs generated under light conditions have strong redox properties, and can undergo redox reactions with substances adsorbed on their surfaces, and can degrade organic pollutants into CO 2 Inorganic small molecules such as water and water can reduce heavy metal ions to non-toxic low-priced ions, and can also degrade automobile exhaust, disinfect and sterilize, etc., and have shown good application prospects in many fields. [0003] However, in practical applications, nano-scale photocatalytic particl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J35/02B01D53/86B01D53/72
CPCB01D53/72B01D53/8668B01D2257/704B01D2257/708B01J23/745B01J35/004B01J35/02
Inventor 胡建农
Owner 胡建农
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