Nano carbon-based composite material for degrading formaldehyde by catalytic oxidization and preparation method and application thereof

A composite material and catalytic oxidation technology, which is applied in the field of air purification, can solve the problems of poor catalyst stability, high reaction temperature, and low efficiency, and achieve the effects of stable performance, high catalyst activity, and reduced production costs

Active Publication Date: 2018-11-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the disadvantages of high cost of existing noble metal catalysts, high reaction temperature, poor catalyst stability and low efficiency under the existing technical conditions

Method used

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  • Nano carbon-based composite material for degrading formaldehyde by catalytic oxidization and preparation method and application thereof
  • Nano carbon-based composite material for degrading formaldehyde by catalytic oxidization and preparation method and application thereof
  • Nano carbon-based composite material for degrading formaldehyde by catalytic oxidization and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of carbon nanotubes: Weigh 1.0g nickel foam into a porcelain boat, put it into an energy-saving tube furnace, raise the temperature to 700°C at a rate of 6°C / min, and burn in static air for 1h. Then pass through 83.3mL / min of H 2 and 416.7mL / min of N 2 The atmosphere is reduced, keep it for 2 hours, then cool down to 440°C naturally, turn off the H 2 and N 2 , and then pass 107mL / min of C 2 h 4 and 428mL / min of N 2 Gas reaction, stop after 1h 2 h 4 and N 2 , natural cooling, thus obtained 3.70g CNTs-Ni.

Embodiment 2

[0033] Weigh 1.0g of nickel foam into a porcelain boat, put it into an energy-saving tube furnace, raise the temperature to 600°C at a heating rate of 6°C / min, and burn in static air for 2h. Then, 100 mL / min of H 2 and 400mL / min of N 2The atmosphere is reduced, keep it for 1h, then cool down to 400°C naturally, turn off the H 2 and N 2 , and then pass 138mL / min of C 2 h 4 and 461mL / min of N 2 Gas reaction, stop after 1h 2 h 4 and N 2 , natural cooling, thus obtained 3.85g CNTs-Ni.

Embodiment 3

[0035] Weigh 1.0g of nickel foam into a porcelain boat, put it into an energy-saving tube furnace, raise the temperature to 800°C at a heating rate of 6°C / min, and burn in static air for 1h. Then pass 78mL / min of H 2 and 521mL / min of N 2 The atmosphere was restored, kept for 3 hours, then cooled down to 500°C naturally, and the H 2 and N 2 , and then pass 100mL / min of C 2 h 4 and 500mL / min of N 2 Gas reaction, stop after 3h 2 h 4 and N 2 , natural cooling, thus obtained 3.76g CNTs-Ni.

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Abstract

The invention discloses a nano carbon-based composite material for degrading formaldehyde by catalytic oxidization, as well as a preparation method and application thereof. The preparation method comprises the step of preparing the composite material by taking a multi-walled carbon nanotube as a carrier and nanoscale MnO2 as an active component. The composite material is applied to a catalytic oxydative degradation reaction and can oxidize formaldehyde to water and carbon dioxide. Low-temperature oxydative degradation of formaldehyde is achieved by means of the high specific surface area, abundant structural defects and good adsorptive property to formaldehyde, of the multi-walled carbon nanotube as well as multivalent and abundant lattice oxygen of manganese oxide, so that the nano carbon-based composite material has the characteristics of over 80% of catalytic degradation efficiency, stable performance and no inactivation. The nano carbon-based composite material overcomes the defects that an existing noble metal catalyst is high in cost, is high in reaction temperature in a condition in the prior art and is poor in stability and low in efficiency. The catalyst can be either applied to adsorption and purification of pollutants such as indoor formaldehyde directly or applied to removal of pollution gas in an air purifier.

Description

technical field [0001] The invention relates to the field of air purification, in particular to a nano-carbon-based composite material for catalytic oxidation and degradation of formaldehyde, a preparation method and application thereof. Background technique [0002] Air is one of the important external environments for human beings to survive. A study on the composition of indoor air pollutants in the past sixty years abroad shows that volatile organic compounds (VOC, volatile organic compounds) are one of the main pollutants in indoor air, and the types of indoor VOCs are increasing with various new chemical The use of substances is increasing, especially in the field of furniture decoration, including many harmful VOCs such as formaldehyde, benzene, toluene, etc. These harmful VOCs can cause headaches, dizziness, eye, nose and throat irritation, drowsiness, chest tightness, nausea and other symptoms. Moreover, with the improvement of building energy-saving design standa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/10B01D53/86B01D53/72
CPCB01D53/8668B01J23/8892B01J35/1004
Inventor 彭峰姜强杨希贤李世杰
Owner SOUTH CHINA UNIV OF TECH
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