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Preparation method of wallpaper composite material for indoor formaldehyde purification

A composite material and formaldehyde purification technology, which is applied in the field of indoor air purification, can solve the problems of poor catalyst immobilization effect and low photocatalytic efficiency of formaldehyde removal, so as to improve the contact area and efficiency of photocatalysis, improve the utilization rate of visible light, and improve the conversion efficiency effect

Active Publication Date: 2021-06-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing wallpaper composite materials for indoor formaldehyde purification, so as to overcome the current problems of low photocatalytic efficiency of formaldehyde removal and poor catalyst immobilization effect. The present invention can improve photocatalytic efficiency and formaldehyde conversion rate, At the same time, formaldehyde is released in the form of carbon dioxide and water, which is of positive significance to the purification of indoor air and the creation of a livable environment.

Method used

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preparation example Construction

[0029] A method for preparing wallpaper composite materials for indoor formaldehyde purification, comprising the following steps:

[0030] (1) Flake MXene / S-GQDs / TiO 2 preparation of

[0031] (2) Preparation of wallpaper composite material;

[0032] The preparation method of MXene described in step (1) is to add 5-10gLiF to 100mL mass fraction 30% HCl solution as an etchant, and etch the precursor Ti at 30-60°C 3 AlC 2 After 20-32 hours of centrifugation to remove impurities, and then ultrasonic stripping to obtain layered Ti 2 CT x Stable colloidal suspension, the suspension is suction filtered to obtain MXene.

[0033] The preparation method of S-GQDs described in step (1) uses waste tire particles with a particle size of 50-100 meshes as raw materials, with a power of 800W-1200W and a temperature of 400°C-800°C, and microwave-assisted depolymerization to obtain a liquid product- pyrolysis oil. Put the obtained pyrolysis oil into a dialysis bag (molecular weight 8,000...

Embodiment 1

[0040] MXene is prepared by adding 5gLiF to 100mL 30% HCl solution as an etchant, and etching the precursor Ti at 30°C 3 AlC 2 The Al atoms in the solution were centrifuged for 32 hours to remove impurities, and then ultrasonically stripped to obtain layered Ti 2 Stable colloidal suspension of CTx, the suspension is subjected to suction filtration to obtain MXene.

[0041] The preparation of S-GQDs is based on waste tire particles with a particle size of 50 mesh as raw material, and the power is 800W, the temperature is 800°C, and the liquid product-pyrolysis oil is obtained by microwave-assisted depolymerization. Put the obtained pyrolysis oil into a dialysis bag (molecular weight 8000) for dialysis (change the water every 4 hours, dialysis for 32 hours), after the dialysis is completed, transfer the solution to a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 150°C for 14 hours After that, it was cooled and filtered to obtain S-GQDs.

[0042] TiO ...

Embodiment 2

[0046] MXene is prepared by adding 10gLiF to 100mL 30% HCl solution as an etchant, and etching the precursor Ti at 50°C 3 AlC 2 After 28 hours of centrifugation to remove impurities, and then ultrasonically stripped to obtain layered Ti 2 CT x Stable colloidal suspension, the suspension is suction filtered to obtain MXene.

[0047] The preparation of S-GQDs is based on waste tire particles with a particle size of 70 mesh as raw material, with a power of 1000W and a temperature of 600°C, and microwave-assisted depolymerization to obtain a liquid product-pyrolysis oil. Put the obtained pyrolysis oil into a dialysis bag (molecular weight 9000) for dialysis (change the water every 4 hours, 28 hours of dialysis), after the dialysis is completed, transfer the solution to a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 200°C for 12 hours After that, it was cooled and filtered to obtain S-GQDs.

[0048] TiO 2 The preparation uses tetrabutyl titanate as t...

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Abstract

The invention discloses a preparation method of a wallpaper composite material for indoor formaldehyde purification. TiO2, S-GQDs and MXene are mutually combined to form a sandwich structure, layer-by-layer transmission of electrons under optical excitation can be realized, and the photocatalytic efficiency is improved. The S-GQDs serve as a core layer of the sandwich structure and can play a role of an adhesive at the same time, and the stability and strength of the sheet-shaped MXene / S-GQDs / TiO2 structure are improved. According to the prepared wallpaper composite material, the surface of wallpaper is coated with the sheet-shaped MXene / S-GQDs / TiO2 of a nano multi-layer structure, the photocatalytic contact area and efficiency of the MXene / S-GQDs / TiO2 are synergistically improved by utilizing the large specific surface area of the wallpaper, and the composite material has a remarkable effect on purification of indoor formaldehyde.

Description

technical field [0001] The invention belongs to the field of indoor air purification, and in particular relates to a method for preparing wallpaper composite materials used for indoor formaldehyde purification. Background technique [0002] Formaldehyde (HCHO), also known as formic aldehyde, is a colorless gas with a strong pungent taste, volatile and highly toxic. It is a recognized source of allergies and has been identified as carcinogenic and carcinogenic by the World Health Organization abnormal substance. Therefore, the removal of indoor formaldehyde becomes particularly important. [0003] Indoor formaldehyde comes from many aspects, the most important source is wood-based panels, and indoor carpets, synthetic fabrics, various adhesive coatings, etc. also have a certain amount of formaldehyde release. In addition, another source of formaldehyde is incomplete combustion of indoor kitchen fuel, and tobacco smoke also contains high concentrations of formaldehyde. Exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/20D21H23/52D21H25/06B01D53/86B01D53/72
CPCD21H27/20D21H23/52D21H25/06B01D53/8668B01D2257/708B01D2258/06B01D2259/80Y02A50/20
Inventor 王文亮赵兴金王旭彪马玉军
Owner SHAANXI UNIV OF SCI & TECH
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