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Titanium dioxide photocatalyst and preparation method and application thereof in ceramic tiles

A photocatalyst, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, physical/chemical process catalysts, etc., can solve the problems of easy secondary pollution, inability to remove, slowness, etc.

Pending Publication Date: 2020-10-20
FOSHAN OCEANO CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods of purifying indoor air mainly include: Ventilation method: it can improve the indoor pollution in a short time, but the release of most harmful substances is a relatively slow process, and simply opening doors and windows for ventilation cannot guarantee indoor air pollution. reduce harmful substances to a level that is safe for the human body; use an air purifier: the motor drives the fan blades to circulate the indoor air, and when the air with pollutants passes through the filter screen inside the purifier, it will be adsorbed on the filter screen Unable to pass through, through repeated operations for a certain period of time, the purpose of purifying the indoor air can be achieved, but the collected particles will block the glass fiber gap and cannot be used, the filter needs to be replaced regularly, and there is noise during use; activated carbon method: only adsorption The formaldehyde in the air cannot achieve the purpose of elimination, and it is easy to cause secondary pollution; photocatalytic method: the catalyst material based on nano-titanium dioxide, under the irradiation of ultraviolet light, produces photooxidation and reduction, which can decompose and eliminate the formaldehyde in the air. Formaldehyde, benzene, TVOC and other pollutants, and can kill bacteria, viruses, fungi and plant pollen in the air. It has the advantages of strong purification ability, long-lasting and stable effect, no secondary pollution, and low maintenance cost.
However, the photocatalyst can only work and remove harmful gaseous organic substances such as formaldehyde mainly through ultraviolet irradiation, and cannot play a catalytic role only under visible light conditions, so it cannot remove harmful gaseous organic substances such as formaldehyde in the room.

Method used

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  • Titanium dioxide photocatalyst and preparation method and application thereof in ceramic tiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 5g titanium powder to 15ml dilute H 2 SO 4 (H 2 SO 4 : water=1:4), heat and stir until the titanium powder is fully dissolved, add 100ml of deionized water to dilute, adjust the pH value to 7.5 with ammonia water, continue to stir, filter and wash to obtain a solid, and dissolve the obtained solid in 200ml 7.5 g of citric acid was added to deionized water, and while stirring, 10 g of hydrogen peroxide was added, and after stirring for 30 min, the mixture was stirred in a constant temperature water bath at 60° C. for 6 h to obtain titanium dioxide photocatalyst 1 .

[0024] A preparation process for photocatalytic glazed tiles, comprising the following steps:

[0025] 1) The ceramic powder is dry-pressed, the press pressure is 3800T, and the green body layer is obtained, and a layer of 0.3mm top glaze is applied on the green body layer to obtain the top glaze layer, which is dried in a drying kiln at 80°C, and dried Time 50min;

[0026] 2) Using digital inkjet p...

Embodiment 2

[0030] Add 5g titanium powder to 15ml dilute H 2 SO 4 (H 2 SO 4 : water=1:4), heat and stir until the titanium powder is fully dissolved, add 150ml of deionized water to dilute, adjust the pH value to 8 with ammonia water, continue to stir, filter and wash to obtain a solid, and dissolve the obtained solid in 300ml 10 g of citric acid was added into deionized water, and while stirring, 13 g of hydrogen peroxide was added, and after stirring for 30 min, the mixture was stirred in a constant temperature water bath at 60° C. for 7 h to obtain titanium dioxide photocatalyst 2 .

[0031] A preparation process for photocatalytic glazed tiles, comprising the following steps:

[0032] 1) The ceramic powder is dry-pressed, the press pressure is 4000T, and the green body layer is obtained, and a layer of 0.4mm top glaze is applied on the green body layer to obtain the top glaze layer, which is dried in a drying kiln at 100°C, and dried Time 35min;

[0033] 2) Using digital inkjet p...

Embodiment 3

[0037] Add 5g titanium powder to 15ml dilute H 2 SO 4 (H 2 SO 4 : water=1:4), heat and stir until the titanium powder is fully dissolved, add 150ml of deionized water to dilute, adjust the pH value to 8.5 with ammonia water, continue to stir, filter and wash to obtain a solid, and dissolve the obtained solid in 400ml Add 7.5 g of citric acid into deionized water, and while stirring, add 13 g of hydrogen peroxide, stir for 30 min, then stir in a constant temperature water bath at 80° C. for 8 h to obtain titanium dioxide photocatalyst 3 .

[0038] A preparation process for photocatalytic glazed tiles, comprising the following steps:

[0039] 1) The ceramic powder is dry-pressed, the press pressure is 4500T, and the green body layer is obtained, and a layer of 0.5mm top glaze is applied on the green body layer to obtain the top glaze layer, which is dried in a drying kiln at 120°C, and dried Time 30min;

[0040] 2) Using digital inkjet printing technology to print the desig...

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Abstract

The invention belongs to the technical field of preparation and application of photocatalysts, and discloses a titanium dioxide photocatalyst as well as a preparation method and application thereof inceramic tiles. The prepared titanium dioxide photocatalyst completely overcomes the defect that a traditional photocatalytic material can generate a catalytic effect only through ultraviolet irradiation; and the photocatalyst can generate catalytic action under a visible light condition in an indoor environment, is beneficial to decomposition of formaldehyde, benzene, TVOC and other harmful gasesin air, has the effects of deodorization, antibiosis, mildew prevention, pollution prevention, air purification and the like, and is suitable for being applied to the fields of ceramic tiles and thelike. The titanium type titanium dioxide photocatalyst is added into wax water, and the catalytic material is attached to the surface of a ceramic tile in a waxing manner, so that the service life ofthe ceramic tile is prolonged, and daily friction does not influence the ceramic tile. The method is simple in process, easy to industrialize and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst preparation and application thereof, and in particular relates to a titanium dioxide photocatalyst, a preparation method thereof and an application thereof in ceramic tiles. Background technique [0002] With the improvement of people's living standards, the real estate industry and decoration industry have begun to develop rapidly, and the problem of indoor air pollution has become increasingly serious, which has greatly affected people's health. Among the indoor air pollutants that are likely to cause major harm to the human body are: formaldehyde, benzene, ammonia, TVOC, radon, etc. At present, the methods of purifying indoor air mainly include: Ventilation method: it can improve the indoor pollution in a short time, but the release of most harmful substances is a relatively slow process, and simply opening doors and windows for ventilation cannot guarantee indoor air pollution. reduce h...

Claims

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Application Information

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IPC IPC(8): C01G23/053B01J21/06C04B41/89
CPCC01G23/053B01J21/063C04B41/89C04B41/52B01J35/39C04B41/50C04B41/4543C04B41/4578C04B41/0072C04B41/5022C04B41/5041C04B41/4535Y02A50/20
Inventor 周营柯善军孙飞野朱志超
Owner FOSHAN OCEANO CERAMICS
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