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Loaded type catalyst for eliminating formaldehyde at room temperature and preparation method of loaded type catalyst

A supported catalyst and formaldehyde elimination technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of infeasibility, weak effect, secondary pollution, etc., and increase the active specific surface area , good stability, combined with a solid effect

Inactive Publication Date: 2017-03-15
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical purification method mainly refers to the so-called ventilation method. Long-term ventilation and replacement of air is not feasible for cold regions and has certain limitations; the biological purification method refers to the elimination of formaldehyde through the metabolism of plants or the decomposition of bacteria. method, but the respiration rate of plants is relatively slow, with little effect; physical purification methods include: gas adsorption method, plasma air purification method
The adsorption method is to use the adsorption properties of porous materials to adsorb formaldehyde molecules in the air, but it has the disadvantage of secondary pollution after adsorption saturation; the plasma air purification method is to generate a large amount of plasma under the action of high-voltage discharge to oxidize the air. formaldehyde can be eliminated, but its efficiency is low, equipment is expensive, energy consumption is high, and new harmful pollutants are easily produced; photocatalytic oxidation of formaldehyde requires ultraviolet light as a light source, which is expensive and has a short life

Method used

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  • Loaded type catalyst for eliminating formaldehyde at room temperature and preparation method of loaded type catalyst
  • Loaded type catalyst for eliminating formaldehyde at room temperature and preparation method of loaded type catalyst
  • Loaded type catalyst for eliminating formaldehyde at room temperature and preparation method of loaded type catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dissolve 48 g of sodium hydroxide in 120 ml of water, add 0.6 g of titanium dioxide (P25) after cooling down and stir thoroughly for 3 hours to mix evenly, then transfer the evenly mixed solution to a 150 ml hydrothermal reaction kettle, and heat at 200 ºC Under reaction 72h. The obtained precipitate was washed with deionized water, and then dried to about pH=7. Then soak the obtained product in 0.1 mol / L hydrochloric acid solution and stir thoroughly for 24 hours, wash, filter, and dry the washing liquid in an oven at 80 ºC for 10 hours after the pH of the washing solution is about 7. Roasted in the furnace for 2 h to obtain titanium dioxide nanobelts, the SEM photos of the titanium dioxide nanobelts are as follows: figure 1 As shown, the titania nanoribbons are ribbon-shaped, with a width of 50 nm to 70 nm and a length of 5 μm to 30 μm.

[0023] The above unbaked samples were immersed in 0.02 M sulfuric acid solution and stirred thoroughly for 2 h until they were ev...

Embodiment 2

[0028] The acid-treated titanium dioxide nanobelts prepared by the same method as in Example 1 were used.

[0029] Add 0.6 g of the acid-treated titanium dioxide nanoribbons prepared above into a round-bottomed flask filled with 10 ml of deionized water, ultrasonically disperse for 20 minutes, and accurately measure 300 μl with a pipette gun at a concentration of 40 mg / ml (according to platinum element Concentration by mass meter, the same below) of chloroplatinic acid aqueous solution was added dropwise to the titanium dioxide solution, and after ultrasonic dispersion for 30 minutes, a mixed aqueous solution of 3.5 ml of sodium borohydride and sodium hydroxide was added to the above mixed solution with a pipette gun. In the solution, continue ultrasonication for 30 minutes to mix evenly, evaporate, dry in a blast drying oven at 100 ºC for 10 hours, and grind in an agate mortar to obtain a supported catalyst. The loading amount of platinum element in the prepared catalyst was ...

Embodiment 3

[0032] The acid-treated titanium dioxide nanobelts prepared by the same method as in Example 1 were used.

[0033] Add 0.6 g of the acid-treated titanium dioxide nanoribbons prepared above into a round-bottomed flask filled with 10 ml of deionized water, ultrasonically disperse for 20 minutes, and accurately measure 900 μl with a pipette gun at a concentration of 40 mg / ml (according to platinum element The concentration of the mass meter, the same below) of chloroplatinic acid aqueous solution was added dropwise in the titanium dioxide solution, and after ultrasonic dispersion for 30 minutes, the mixed aqueous solution of 3.5ml sodium borohydride and sodium hydroxide was added to the above mixed solution with a pipette gun. In the solution, continue ultrasonication for 30 minutes to mix evenly, evaporate, dry in a blast drying oven at 100 ºC for 10 hours, and grind in an agate mortar to obtain a supported catalyst. The loading amount of platinum element in the prepared catalyst ...

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Abstract

The invention discloses a loaded type catalyst for eliminating formaldehyde at the room temperature and a preparation method of the loaded type catalyst. The loaded type catalyst for eliminating formaldehyde at the room temperature is prepared from an acid-treated titanium dioxide nanoribbon as a carrier and platinum as an active component. The preparation method comprises the following steps: (1) under the action of magnetic stirring, uniformly dispersing the dioxide nanoribbon into a solution, adding a chloroplatinic acid solution, and stirring uniformly; and (2) adding a mixed solution of sodium borohydride and sodium hydroxide, sufficiently stirring, evaporating and drying, thereby obtaining the loaded type catalyst. The loaded type catalyst has relatively high activity and stability for formaldehyde at the room temperature in an environment with the relative humidity RH of 0-80%, and is capable of completely converting formaldehyde into non-toxic carbon dioxide and water under the condition that no other devices are used, so that formaldehyde can be eliminated in an environment-friendly manner.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a supported catalyst for eliminating formaldehyde at room temperature and a preparation method thereof. Background technique [0002] Formaldehyde is one of the main indoor air pollutants, which mainly comes from various indoor decoration materials: wood boards, adhesives, interior wall paint, wooden furniture, wallpaper and carpets, etc. It has been identified by the World Health Organization (WHO) as a One of the culprits of human beings suffering from serious diseases such as cancer and aberrations. If exposed to an environment polluted by formaldehyde, stinging eyes and nose will occur in a short period of time, causing respiratory diseases such as rhinitis and pharyngitis; long-term exposure to formaldehyde will cause chronic poisoning and damage the nervous system; direct skin contact with formaldehyde will cause Cause allergic dermatitis and other diseases; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01D53/86B01D53/72
CPCB01D53/8668B01D2258/06B01J23/42
Inventor 崔维怡惠继星薛丹
Owner JILIN INST OF CHEM TECH
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