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A kind of preparation method of single-atom catalyst for indoor air purification

An indoor air and catalyst technology, applied in the field of single-atom catalyst preparation, can solve the problems of incomplete decomposition and removal of pollutants, secondary pollution, etc., and achieve the effects of abundant reserves, low price, and improved catalytic performance

Active Publication Date: 2019-03-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the preparation of a catalyst that cooperates with low-temperature plasma technology will solve the shortcomings of low-temperature plasma technology that decomposes and removes pollutants incompletely and easily causes secondary pollution.

Method used

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  • A kind of preparation method of single-atom catalyst for indoor air purification

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preparation example Construction

[0021] A kind of preparation method of the single-atom catalyst of indoor air purification of the present invention comprises the following steps:

[0022] (a) Prepare the carrier:

[0023] (1) Ce(NO 3 ) 3 ·6H 2 O is dissolved in deionized water to make its concentration 0.3-0.6mol / L, and then ethylene glycol or glycerin is added to the solution as a dispersant, and the dispersant in the solution and Ce 3+ The mol ratio is (2-3):1;

[0024] (2) Add ammonia water dropwise to the solution to pH=8-10, stir, then let stand for 8-12h, and filter to obtain the precipitate;

[0025] (3) Wash the filtered precipitate with distilled water, then wash with ethanol to remove ethylene glycol or glycerin;

[0026] (4) Dry the washed precipitate in an oven at 100-120° C. for 4-6 hours;

[0027] (5) Grind the dried precipitate so that the particle diameter is 20-40 mesh, or directly put it into a mortar, then put it into a muffle furnace, and roast it at 300-500°C to obtain a yellow sol...

Embodiment 1

[0032] (a) Ce(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to make its concentration 0.3mol / L, and an appropriate amount of ethylene glycol was added as a dispersant (dispersant and Ce 3+ The molar ratio is 2). Add ammonia water dropwise to pH=10. Continue to stir, and after standing for 8 hours, filter, wash with distilled water for 3 times, and wash with ethanol for 3 times, and then place it in an oven at 110° C. for 4 hours to dry. Grind the dried precipitate so that the particle diameter is 20-40 mesh, then put it into a muffle furnace, and bake it at 300°C to obtain a yellow solid powder—CeO 2 carrier.

[0033] (b) RuCl 3 ·3H 2 O is dissolved in deionized water to prepare an impregnating solution, and the mass concentration of ruthenium in the impregnating solution is 5 mg Ru / mL;

[0034] (c) Using an equal volume impregnation method, the CeO prepared in step (a) 2 The carrier was added to the impregnation solution prepared in step (b), followed by the iodo...

Embodiment 2

[0037] (a) Ce(NO 3 ) 3 ·6H 2 O was dissolved in deionized water to make its concentration 0.6mol / L, and an appropriate amount of glycerin was added as a dispersant (dispersant and Ce 3+The molar ratio is 3). Aqueous ammonia was added dropwise to pH=8. Continue to stir, and after standing for 12 hours, filter, wash with distilled water for 3 times, and wash with ethanol for 3 times, and then dry in an oven at 100° C. for 6 hours. The dried precipitate is directly put into a mortar, put into a muffle furnace, and calcined at 500°C to obtain a yellow solid powder—CeO 2 carrier.

[0038] (b) RuCl 3 ·3H 2 O is dissolved in deionized water to prepare an impregnating solution, and the mass concentration of ruthenium in the impregnating solution is 50 mg Ru / mL;

[0039] (c) CeO prepared by step (a) 2 Add the carrier to the impregnating solution prepared in step (b), then add iodoform solution dissolved in ethylene glycol, mix well, and impregnate at 30°C for 18 hours, then dr...

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Abstract

The invention discloses a preparation method of a monoatomic catalyst for indoor air purification. The preparation method comprises the following steps of (a) performing preparation to obtain a yellow solid powder CeO2 carrier; (b) dissolving RuCl3.3H2O into deionized water to obtain dipping liquid, wherein the mass concentration of ruthenium in the dipping liquid is 5 to 50 mg / mL; and (c) preparing the monoatomic catalyst: adding the CeO2 carrier obtained by the step (a) into the dipping liquid obtained by the step (b) by a dipping method, adding an iodoform solution dissolved into glycol, mixing uniformly, dipping, drying the dipped solution on a rotary evaporator and calcining to finally obtain the monoatomic catalyst Ru / CeO2. By the method, the general catalytic reaction dosage (the load capacity is very low) is extremely small, and the atom utilization rate is extremely high.

Description

technical field [0001] The invention relates to a method for preparing a single-atom catalyst, which is applied to indoor purification of harmful volatile organic compounds in conjunction with low-temperature plasma technology. Background technique [0002] In the current society, the problem of indoor air quality is an increasingly serious and more and more important issue. Various problems such as excessive formic acid, the spread of microorganisms, viruses and bacteria, and air-conditioning syndrome are constantly flooding people's eyeliner. Various industrial waste gases, automobiles The emission of exhaust gas makes the air quality environment worse. People are looking for a simple and direct way to solve the air quality problem and maintain physical and mental health. The means used for indoor air purification include electrostatic dust collection, negative ions, plasma, ozone, activated carbon adsorption, photocatalytic oxidation (photocatalyst) and other technologies...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63B01D53/86B01D53/44
CPCB01D53/8668B01D2257/708B01D2258/06B01J23/002B01J23/63
Inventor 丁辉王宪琴
Owner TIANJIN UNIV
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