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Formaldehyde scavenger and preparation method thereof

A formaldehyde scavenger, a certain amount of technology, applied in the field of preparation of formaldehyde scavenger, can solve the problem of limiting nano-TiO, achieve the effect of improving photocatalytic effect and short reaction cycle

Pending Publication Date: 2020-08-11
尚国龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 The thin film is generally coated on a certain substrate, and then processed at a high temperature above 300 ° C to convert it into a photocatalytically active TiO 2 Nanocrystalline film, and high temperature treatment is not conducive to the application of coating film on the surface of heat-sensitive polymer materials such as textiles and plastics, thus limiting the application of nano-TiO 2 The scope of application (Liu Yue, Chemical Journal of Chinese Universities, 2013: 434-440)

Method used

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  • Formaldehyde scavenger and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Measure 200mL of deionized water, TiO 2 Nano powder 10g, TiO 2 Add the nano powder into deionized water and stir to obtain TiO 2 For colloid, put the above raw materials in a beaker, and add 2g of PVP powder into the beaker at room temperature. Next, 0.1 g of silane coupling agent was added to the colloid, stirred for 1 hour and left to age for 24 hours to obtain a formaldehyde scavenger. It has been determined that the formaldehyde scavenger can remove 1m 3 The concentration is 0.3mg / m 3 The formaldehyde is degraded to 0.03mg / m 3 , The degradation rate can reach 90%.

[0020] Comparative experiment 1: Measure 200mL of deionized water, TiO 2 Nano powder 10g, TiO 2 Add the nano powder into deionized water and stir to obtain TiO 2 Colloid, the above raw materials are placed in a beaker, and 2g of PVP powder is added to the beaker at room temperature to obtain a formaldehyde scavenger. It has been determined that the formaldehyde scavenger can remove 1m 3 The con...

Embodiment 2

[0024] Measure 100mL of deionized water, TiO 2 Nano powder 2g, TiO 2 Add the nano powder into deionized water and stir to obtain TiO 2 For colloid, put the above raw materials in a beaker, and add 1.2g of PVP powder into the beaker at room temperature. Next, 0.2 g of silane coupling agent was added to the colloid, stirred for 0.5 hours, and left to age for 36 hours to obtain a formaldehyde scavenger. It has been determined that the formaldehyde scavenger can remove 1m 3 The concentration is 0.3mg / m 3 The formaldehyde is degraded to 0.06mg / m 3 , The degradation rate can reach 80%.

Embodiment 3

[0026] Measure 100mL of deionized water, TiO 2 Nano powder 2g, TiO 2 Add the nano powder into deionized water and stir to obtain TiO2 For colloid, put the above raw materials in a beaker, and add 1.2g of PVP powder into the beaker at room temperature. Next, 0.2 g of silane coupling agent was added to the colloid, stirred for 2 hours and left to age for 12 hours to obtain a formaldehyde scavenger. It has been determined that the formaldehyde scavenger can remove 1m 3 The concentration is 0.3mg / m 3 The formaldehyde is degraded to 0.07mg / m 3 , the degradation rate can reach 76.6%.

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Abstract

The invention discloses a TiO2 / PVP / silane coupling agent formaldehyde scavenger and a preparation method thereof. The particle size of the TiO2 / PVP / silane coupling agent formaldehyde scavenger is 5-7nm, and the TiO2 / PVP / silane coupling agent formaldehyde scavenger has high dispersion crystallinity. According to the method, the formaldehyde scavenger with high catalytic performance is prepared by utilizing organic-inorganic hybrid composite modification measures of PVP and a silane coupling agent, and the formaldehyde scavenger prepared by the method is good in visible light photocatalytic performance; the preparation method does not need acid-base neutralization or ethanol synthesis and has the characteristics of simple process, low cost, short preparation period, environmental friendliness and the like. The formaldehyde scavenger can be used in the field of efficient formaldehyde removal under visible light and can also be used for other air purification, environmental protection andthe like and has a good application prospect.

Description

technical field [0001] The invention relates to a preparation method of a formaldehyde scavenger, in particular to a TiO 2 / PVP / silane coupling agent and preparation method thereof. Background technique [0002] There are many types of formaldehyde scavengers, mainly including chemical reaction consuming type and photocatalytic non-consuming type. Photocatalytic non-consumable formaldehyde scavenger based on nanoscale TiO 2 As a representative, it is a photo-semiconductor material with photocatalytic function. Usually TiO 2 The powder is milled, stirred, and dispersed into an aqueous medium to form a stable slurry. The slurry can be coated on the surface of walls, furniture, sofas, ceilings, curtains, etc. Under the action of ultraviolet light, it will produce a strong catalytic degradation function, which can effectively degrade formaldehyde gas in the air; the formaldehyde scavenger can also effectively kill many species of bacteria, and can decompose and harmlessly t...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J31/06B01J21/06B01D53/86B01D53/72B82Y30/00B82Y40/00
CPCB01J31/38B01J31/069B01J21/063B01D53/007B01D53/8668B82Y30/00B82Y40/00B01D2257/704B01J35/23B01J35/39
Inventor 尚国龙
Owner 尚国龙
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