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Porous carbon composite titanium dioxide-oxyhalide photocatalyst and preparation method thereof

A technology of oxyhalide and titanium dioxide, which is applied in the field of porous carbon composite titanium dioxide-oxyhalide photocatalyst and its preparation, can solve the problems of low conversion efficiency, low reuse rate, short service life, etc., achieve enhanced adsorption capacity, overcome The effect of weak adsorption performance

Inactive Publication Date: 2020-07-31
ZHEJIANG NIRUAN NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the low catalytic conversion efficiency, short service life and low recycling rate of existing formaldehyde, the present invention provides a porous carbon composite titanium dioxide-oxyhalide photocatalyst with high conversion efficiency, long service life and high recycling rate and its preparation method

Method used

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  • Porous carbon composite titanium dioxide-oxyhalide photocatalyst and preparation method thereof
  • Porous carbon composite titanium dioxide-oxyhalide photocatalyst and preparation method thereof
  • Porous carbon composite titanium dioxide-oxyhalide photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A kind of porous carbon composite titania-oxyhalide photocatalyst, its preparation method comprises the steps:

[0036] 1) Weigh a certain mass of titanyl sulfate and ammonia water, mix and stir, and dry after filtering;

[0037] 2) Calcining the product of step 1) at a high temperature at 100°C;

[0038] 3) drop the potassium chloride solution containing bismuth nitrate into the product of step 2), and stir for 1; the temperature is controlled at 30° C.;

[0039] 4) The product of step 3) is separated and dried, put into a container, vacuumized, sealed, and placed at 500°C for 2 to 4 hours;

[0040] 5) Put the product of step 4) into hydrochloric acid solution, soak for 6h; separate, wash with deionized water, and dry;

[0041]6) Put the product of step 5) into the alcohol solution of the porous carbon material precursor, and grow the porous carbon intermediate carbon material in situ at 250°C;

[0042] 7) Place the product of step 6) at 300°C for 15 hours;

[0043...

Embodiment 2

[0047] Example 2: Step 6) of the method for preparing a porous carbon composite titanium dioxide-oxyhalide catalyst described in Example 1) The product calcination temperature is adjusted to 300°C, 400°C, 500°C, 600°C, 700°C, 800°C, and the rest are completely consistent with Example 1.

[0048] The test results are shown in the table below.

[0049]

Embodiment 3

[0050] Embodiment 3: the catalyst type in a kind of porous carbon composite titania-oxyhalide catalyst described in embodiment 1 is adjusted, and regulating catalyst is, pure BiOCl catalyst, pure TiO Catalyst, pure MOF, porous carbon composite titania- Oxyhalide catalyst, all the other parts are completely consistent with embodiment 1

[0051]

[0052] figure 1 for pure TiO 2 , pure MOFs carbon material, porous carbon composite titanium dioxide-oxyhalide composite material scanning electron microscope, it can be seen that the modified composite material changes significantly, the surface holes increase, and there is an obvious uneven rough structure, indicating that the modification The adsorption capacity of the composite material is enhanced.

[0053] figure 2 for pure TiO 2 , pure MOFs carbon material, porous carbon composite titanium dioxide-oxyhalide composite material parameter diagram, it can be seen that the overall performance of the porous carbon composite ti...

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Abstract

The invention relates to a porous carbon composite titanium dioxide-oxyhalide photocatalyst. According to the photocatalyst, a porous carbon composite titanium dioxide-oxyhalide is prepared by hydrolyzing and depositing an oxyhalide precursor on the surface of titanium dioxide; preparing a porous carbon material precursor (MOF) by adopting an in-situ growth method; and then performing high temperature carbonization to obtain a porous carbon composite titanium dioxide-oxyhalide composite material. The titanium dioxide is calcined at different temperatures, the oxyhalide precursor is one of bismuth oxychloride, bismuth oxyiodide and bismuth oxyfluoride, and the porous carbon material precursor (MOF) is one of a zeolite imidazole framework material and a graphene-like framework material. Thetitanium dioxide-oxyhalide material prepared at 500 DEG C or below is compounded with the MOF carbon material porous carbon, so that the adsorption capacity can be remarkably enhanced, and the formaldehyde conversion efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the field of environmental protection photocatalysis, and in particular relates to a porous carbon composite titanium dioxide-oxyhalide photocatalyst for photocatalytic degradation of formaldehyde and a preparation method thereof. Background technique [0002] Currently, indoor air pollution has been identified as one of the high environmental risks. Formaldehyde, as one of the main indoor air pollutants, diffuses into the room from furniture, textiles, paint, and wallpaper. The World Health Organization suggests that when the concentration of HCHO is higher than 0.1 mg per cubic meter, HCHO is harmful to health. Long-term exposure to high concentrations of HCHO in the air will increase the incidence of leukemia and cancer. Therefore, it is necessary to control HCHO pollution. Recently, many methods for removing HCHO from indoor air have been disclosed, such as absorption, plasma purification, biodegradation, thermocatalytic ...

Claims

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Application Information

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IPC IPC(8): B01J27/06B01J35/10B01D53/72B01D53/86
CPCB01J27/06B01D53/8668B01J35/60B01J35/39
Inventor 曹江行
Owner ZHEJIANG NIRUAN NEW MATERIAL CO LTD
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