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Titanium dioxide/tin sulfide composite material, preparation method and application thereof

A titanium dioxide, composite material technology, applied in chemical instruments and methods, separation methods, chemical/physical processes, etc., can solve the problems of narrow light response range and low quantum efficiency

Active Publication Date: 2016-10-12
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a typical wide-bandgap semiconductor material, titanium dioxide has a narrow photoresponse range and can only absorb ultraviolet light. At the same time, its quantum efficiency is low, so there are many limitations in practical applications.

Method used

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  • Titanium dioxide/tin sulfide composite material, preparation method and application thereof
  • Titanium dioxide/tin sulfide composite material, preparation method and application thereof
  • Titanium dioxide/tin sulfide composite material, preparation method and application thereof

Examples

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preparation example Construction

[0031] Preparation of titanium dioxide / tin sulfide composite material: dissolve sulfur source (such as thioacetamide or thiourea) and tin source (such as tin tetrachloride) in water (such as distilled water), add titanium dioxide mesoporous material, and disperse evenly , using a hydrothermal method to keep the temperature at 120-250° C. for 1-96 hours to obtain a titanium dioxide / tin sulfide composite material. The hydrothermal method may be to use a high-pressure reactor to keep warm at 120-250° C. for 1-96 hours.

[0032] As a detailed example, titanium dioxide mesoporous spheres are dispersed in an aqueous solution of tin source and sulfur source. Tin tetrachloride and thioacetamide, titanium dioxide mesoporous spheres, the dosages of tin tetrachloride and thioacetamide are 0.5g, 0~0.4376g and 0~0.0188g respectively, and the hydrothermal reaction conditions are 150℃ Keep warm for 24 hours.

[0033] Preparation of mesoporous titanium dioxide / tin sulfide composite material...

Embodiment 1

[0045] Dissolve 5.0g of hexadecylamine in 1000ml of absolute ethanol, add 4.0ml of 0.1M potassium chloride aqueous solution, stir well, slowly add 20ml of titanium isopropoxide at a speed of 10ml / min, let it stand for 8 hours and centrifuge to obtain white Titanium dioxide amorphous powder.

[0046] Take 2.0g of titanium dioxide amorphous powder, disperse it in 20ml of ethanol and 20ml of water, evenly disperse it, transfer it to a 50ml reaction kettle, keep it warm at 150°C for 20h, filter and wash it to obtain titanium dioxide mesoporous spherical powder, see figure 1 , which shows the SEM image of the obtained titanium dioxide mesoporous spherical powder, from which it can be seen that the obtained titanium dioxide mesoporous spherical powder has a mesoporous structure with a size of 500-1000 nm.

[0047] Take 0.5g of pure titanium dioxide particle powder, add 15ml of absolute ethanol, and ball mill for 24 hours to obtain a titanium dioxide / ethanol dispersion, which is scra...

Embodiment 2

[0050] Dissolve 5.0g of hexadecylamine in 1000ml of absolute ethanol, add 4.0ml of 0.1M potassium chloride aqueous solution, stir well, slowly add 20ml of titanium isopropoxide at a speed of 10ml / min, let it stand for 8 hours and centrifuge to obtain white Titanium dioxide amorphous powder.

[0051] Take 2.0g of titanium dioxide amorphous powder, disperse it in 20ml of ethanol and 20ml of water, after the dispersion is uniform, transfer it to a 50ml reaction kettle, keep it warm at 150°C for 20h, filter and wash it, and obtain titanium dioxide mesoporous powder.

[0052] Take 0.5g titanium dioxide mesoporous powder, 0.1094g tin tetrachloride pentahydrate crystal and 0.0047g thioacetamide, disperse in 30ml distilled water, transfer to 50ml reaction kettle after dispersing evenly, keep it warm at 150℃ for 24h, centrifuge After washing and drying, a titanium dioxide / tin sulfide composite material is obtained. The TEM photo of the composite material in this example is shown in ...

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Abstract

The invention relates to a titanium dioxide / tin sulfide composite material, a preparation method and application thereof. The titanium dioxide / tin sulfide composite material includes titanium dioxide particles and tin sulfide particles growing in situ on the surfaces of the titanium dioxide particles by hydrothermal method, the molar mass ratio of SnS2 and TiO2 in the titanium dioxide / tin sulfide composite material is (0.001-0.20):1, preferably (0.09-0.14):1, the particle size of the titanium dioxide particles is 10-50nm, and the particle size of the tin sulfide particles is 5-10nm. The invention adopts hydrothermal method (chemical bath method) to grow tin sulfide particles in situ on the titanium dioxide surface so as to obtain the titanium dioxide / tin sulfide composite material, and the titanium dioxide / tin sulfide composite material is applied to visible light for photocatalytic degradation of formaldehyde, thus reaching the purpose of indoor air purification. At the same time, by adjusting different Sn / Ti molar ratios, a composite coating material with the optimal visible-light catalytic activity can be obtained.

Description

technical field [0001] The invention relates to a novel composite coating material and a preparation method thereof, belonging to the field of preparation of photocatalytic materials. Background technique [0002] Titanium dioxide (TiO 2 ) is widely used in solar cells, photocatalytic hydrogen production, and photocatalytic degradation of organic and inorganic pollutants as an ideal semiconductor material due to its advantages of chemical and photocorrosion resistance, stable physical and chemical properties, non-toxicity, and low cost. However, as a typical wide-bandgap semiconductor material, titanium dioxide has a narrow photoresponse range and can only absorb ultraviolet light. At the same time, its quantum efficiency is low, so there are many limitations in practical applications. [0003] Shao Changlu from Northeast Normal University loaded tin sulfide hexagonal particles on titanium dioxide nanofibers by hydrothermal method, and studied their catalytic ability to deg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01D53/86B01D53/72
CPCB01D53/8668B01J21/063B01J27/04B01D2255/20707B01D2255/2094B01J35/39
Inventor 陆冠宏谢晓峰孙静王焱朱书影
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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