Preparation method and application of silver/silver halide-loaded mesoporous titanium dioxide microsphere

A mesoporous titanium dioxide, titanium dioxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of short wavelength of ultraviolet light, poor penetration, poor effect, etc., and achieve good effect and low cost. , good catalytic effect

Pending Publication Date: 2020-05-08
常州良福朗清生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a photocatalyst that can catalyze the decomposition of formaldehyde, titanium dioxide is often used to remove formaldehyde. Titanium dioxide has the advantages of cheap, easy to obtain, non-toxic and harmless, stable chemical properties, and strong redox catalytic ability, but the absorption peak of titanium dioxide is at 400nm In the following, photocatalysts that belong to the ultraviolet light response type need ultraviolet light to play a photocatalytic effect. In sunlight, ultraviolet light only accounts for 7%, and ultraviolet light has a short wavelength and poor penetration. Therefore, the use of sunlight in daily life Irradiation of titanium dioxide to achieve catalysis, the effect is not good
Although noble metal photocatalysts are highly active visible light catalysts, they are expensive

Method used

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  • Preparation method and application of silver/silver halide-loaded mesoporous titanium dioxide microsphere
  • Preparation method and application of silver/silver halide-loaded mesoporous titanium dioxide microsphere
  • Preparation method and application of silver/silver halide-loaded mesoporous titanium dioxide microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0025] The preparation method of the silver / silver halide-loaded mesoporous titanium dioxide microspheres of this embodiment is mainly realized by the following steps:

[0026] ① Mix 0.3mL tetrabutyl titanate and 20mL diethylene glycol, stir at 25°C for 8h to obtain a mixed solution;

[0027] ②Add the mixture obtained in step ① into 60mL of acetone containing 0.38mL dropwise, and keep stirring for 120min to obtain a white precipitate, which is filtered, rinsed and collected;

[0028] ③ Heating the collected white precipitate at 550°C for 8 hours to obtain anatase titanium dioxide microspheres;

[0029] ④Weigh 0.23g of titanium dioxide microspheres, disperse them in 20mL of pure water, stir for 1h, then add 0.15g of cetyltrimethylammonium fluoride dropwise, and keep stirring for 1h to obtain a mixed solution;

[0030] ⑤Add 800uL silver nitrate solution with a concentration of 0.1mol / L to the mixed solution obtained in step ④, and continue to stir for 1h; then use simulated sun...

Embodiment 2）

[0034] The preparation method of the mesoporous titania microspheres loaded with silver / silver halide of this embodiment is the same as in Example 1 in other respects, except that:

[0035] One, in step ④, the weight of the titanium dioxide microspheres taken is 0.35g, and what 0.15g is added dropwise is cetyltrimethylammonium chloride;

[0036] Second, what is obtained in step ⑥ is the mesoporous titanium dioxide microspheres loaded with silver / silver chloride.

[0037] The ultraviolet-visible light absorption spectra of the mesoporous titanium dioxide microspheres loaded with silver / silver chloride prepared in this example and pure titanium dioxide are compared for example figure 1 shown.

Embodiment 3）

[0039] The preparation method of the mesoporous titania microspheres loaded with silver / silver halide of this embodiment is the same as in Example 1 in other respects, except that:

[0040] One, in step ④, the weight of the titanium dioxide microspheres taken is 0.30g, and 0.18g cetyltrimethylammonium bromide is added dropwise;

[0041] Its two, in step ⑤, the continuous stirring time is 2h;

[0042] Third, what is obtained in step ⑥ is the mesoporous titanium dioxide microspheres loaded with silver / silver bromide.

[0043] The ultraviolet-visible light absorption spectra of the mesoporous titanium dioxide microspheres loaded with silver / silver bromide prepared in this example and pure titanium dioxide are compared as figure 1 shown.

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Abstract

The invention provides a preparation method of a silver / silver halide-loaded mesoporous titanium dioxide microsphere. The preparation method comprises the following steps: mixing a proper amount of tetrabutyl titanate and diethylene glycol, and carrying out stirring at 25 DEG C for 8 hours; dropwise adding a mixture obtained in the previous step into acetone and continuing stirring to obtain a white precipitate; heating the collected white precipitate at 550 DEG C for 8 hours to obtain anatase titanium dioxide microspheres; weighing a proper amount of the titanium dioxide microspheres, dispersing the titanium dioxide microspheres in 20 mL of pure water, carrying out stirring for 1 h, dropwise adding a proper amount of hexadecyl trimethyl ammonium halide, and continuing stirring for 1 h; adding a silver nitrate solution, and continuing stirring for 1-2 hours; after illuminating for 30 minutes, centrifugally collecting a precipitate, and cleaning the precipitate with pure water to obtaina sample; and drying the sample at 60 DEG C, and then heating the sample for 8 hours in a nitrogen atmosphere at 300 DEG C to obtain the silver / silver halide-loaded mesoporous titanium dioxide microsphere. The titanium dioxide microsphere prepared by the method can be used as an effective visible-light-induced photocatalyst for catalytically decomposing formaldehyde.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst for decomposing formaldehyde, in particular to a preparation method and application of silver / silver halide-loaded mesoporous titanium dioxide microspheres for visible light catalytic decomposition of formaldehyde. Background technique [0002] Formaldehyde is a colorless, odorless, irritating gas that is very harmful to the human body. At present, the catalytic decomposition of formaldehyde is a common and efficient method for removing formaldehyde. As a photocatalyst that can catalyze the decomposition of formaldehyde, titanium dioxide is often used to remove formaldehyde. Titanium dioxide has the advantages of cheap, easy to obtain, non-toxic and harmless, stable chemical properties, and strong redox catalytic ability, but the absorption peak of titanium dioxide is at 400nm In the following, photocatalysts that belong to the ultraviolet light response type need ultraviolet light to pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/08B01J27/10B01J27/12B01J35/08B01J35/10B01D53/86B01D53/72
CPCB01J27/08B01J27/10B01J27/12B01J35/08B01J35/10B01J35/004B01D53/8668B01D2255/802B01D2257/70
Inventor 薛烽胡衎刘洪亮李军配
Owner 常州良福朗清生物科技有限公司
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