Flexible platinum formaldehyde room-temperature oxidation catalyst and preparation method thereof

An oxidation catalyst and formaldehyde technology, applied in the field of indoor air purification, can solve the problems of high equipment requirements, complex process, increased air resistance, etc., and achieve the effect of avoiding easy breaking, firm bonding and small air resistance.

Active Publication Date: 2017-06-09
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from a practical point of view, the catalysts prepared in the above published patents are mostly made of ordinary porous inorganic nanoparticles (such as titanium dioxide, aluminum oxide, molecular sieves, cerium oxide and silicon oxide, etc.) as carriers. Filled purification equipment needs to be pressed into tablets or further loaded on other bulky carriers before it can be used, which will complicate the process, and there are problems such as reduced catalytic activity, large air resistance and easy fall off of the catalyst
In order to overcome the above defects, the patent CN201410015867.4 TiO prepared by electrospinning 2 As a carrier, the supported noble metal/TiO was prepared by impregnation~room temperature reduction~deposition 2 Composite catalyst, the newly prepared catalyst

Method used

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  • Flexible platinum formaldehyde room-temperature oxidation catalyst and preparation method thereof
  • Flexible platinum formaldehyde room-temperature oxidation catalyst and preparation method thereof
  • Flexible platinum formaldehyde room-temperature oxidation catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0024] (1) First, dissolve butyl titanate in absolute ethanol, add acetylacetone, stir to form a transparent solution, then add dropwise to an acidic (pH = 2) aqueous solution containing 0.01% PVA, and stir for 6 days to obtain stability TiO 2 Sol, wherein the molar ratio of water, absolute ethanol, acetylacetone and butyl titanate is =100:2:0.5:0.5.

[0025] (2) Soak absorbent cotton in the TiO of step (1) 2 In the sol, soaking time is 5 min, in which absorbent cotton and TiO 2 The mass ratio is 1:2.0; o Dry at C for 5min, then at 115 o C for 30 min, then repeat the above process, but the drying temperature is 60 o C, with a drying time of 12 h, TiO 2 / Cotton fiber composite base material.

[0026] (3) Add the complexing agent trisodium citrate to the chloroplatinic acid solution, stir evenly, and mix the TiO obtained in step (2) 2 / Cotton fiber composite base material was dispersed in the above mixed solution and soaked for 5 min, wherein chloroplatinic acid was cal...

Embodiment 2

[0028] Preparation of embodiment 2 formaldehyde room temperature oxidation catalyst

[0029] (1) First, dissolve butyl titanate in absolute ethanol, add acetylacetone, stir to form a transparent solution, then add dropwise to an acidic (pH = 2.5) aqueous solution containing 0.05% PVA, and stir for 8 days to obtain a stable solution TiO 2 Sol, wherein the molar ratio of water, acid, absolute ethanol, acetylacetone and butyl titanate is =100:4:0.5:0.5.

[0030] (2) Soak absorbent cotton in the TiO of step (1) 2 In the sol, the soaking time is 5 min, in which cotton and TiO 2 The mass ratio is 1:2.5, after being separated by the filter screen, at 60 o Dry at C for 12 h to obtain TiO 2 / Cotton fiber composite base material.

[0031] (3) Add the complexing agent trisodium citrate to the chloroplatinic acid solution, stir evenly, and mix the TiO obtained in step (2) 2 / Cotton fiber composite base material was dispersed in the above mixed solution and soaked for 5 min, wherei...

Embodiment 3

[0032] Preparation of embodiment 3 formaldehyde room temperature oxidation catalyst

[0033] (1) First, dissolve butyl titanate in absolute ethanol, add acetylacetone, stir to form a transparent solution, then add dropwise to an acidic (pH = 3) aqueous solution containing 0.01% PVA, and stir for 4 days to obtain stability TiO 2 Sol, wherein the molar ratio of water, absolute ethanol, acetylacetone and butyl titanate is =100:2:0.1:0.1.

[0034] (2) Soak absorbent cotton in TiO 2 In the sol, the soaking time is 5 min, in which cotton and TiO 2 The mass ratio is 1:2, after being separated by the filter screen, at 80 o C, with a drying time of 10 h, TiO 2 / Cotton fiber composite base material.

[0035] (3) Add the complexing agent trisodium citrate to the chloroplatinic acid solution, stir evenly, and mix the TiO obtained in step (2) 2 / Cotton fiber composite base material was dispersed in the above mixed solution and soaked for 5 min, wherein chloroplatinic acid was calcu...

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Abstract

The invention relates to a flexible platinum formaldehyde room-temperature oxidation catalyst and a preparation method thereof, in particular to a Pt/TiO2/cotton fiber flexible composite formaldehyde room-temperature oxidation catalyst and a preparation method thereof. The catalyst comprises a degreased cotton fiber carrier, a nano TiO2 surface coating and Pt active ingredients dispersed on the surface of the TiO2 coating, wherein the Pt active ingredients exist in a zero-valence form, grain size ranges from 1nm to 10nm, and loading capacity is 0.05-2wt%. The Pt/TiO2/cotton fiber flexible composite formaldehyde room-temperature oxidation catalyst has the advantages of hierarchical mesoporous-macroporous structure, light weight and flexibility, Pt is combined firmly with the TiO2 coating and carrier cotton fiber, elemental Pt of the active ingredients is high in dispersity on the surface of the TiO2 coating and small in grain size and can catalytically decompose formaldehyde efficiently at room temperature, noble metal Pt is low in consumption and air resistance, and the catalyst is suitable for using used in various air purifiers.

Description

technical field [0001] The present invention relates to a kind of Pt / TiO 2 The invention discloses a catalyst for room-temperature oxidation of cotton fiber composite formaldehyde, which belongs to the field of indoor air purification. Background technique [0002] Formaldehyde is one of the most important pollutants in indoor air and has great toxicity. At present, eliminating indoor formaldehyde pollution has become a hot research topic in the field of environmental governance. Among the existing formaldehyde removal methods, the room temperature catalytic oxidation method is better than other methods (adsorption method, absorption method, negative ion oxidation method, ozone catalytic oxidation method, biological filtration / plant purification method, low temperature plasma method and photocatalytic oxidation method, etc.) It has unique advantages, it can be carried out under normal temperature and pressure, high formaldehyde removal efficiency, simple equipment, long li...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J35/06B01J35/10B01D53/86B01D53/72
CPCB01D53/8668B01D2259/4508B01J31/38B01J35/06B01J35/1052
Inventor 聂龙辉汪杰
Owner HUBEI UNIV OF TECH
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