A kind of preparation method of precious metal deozone catalyst

A technology of catalysts and precious metals, which is applied in the field of preparation of precious metal deozone catalysts, can solve the problems of easy loss of precious metal active components, reduce catalyst activity, and affect catalyst activity, so as to avoid the decline of catalytic activity, improve catalytic activity, and improve activity. Effect

Active Publication Date: 2022-03-18
宁波智通环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Noble metal catalysts have a high catalytic decomposition effect on ozone. The existing noble metal deozone catalysts have a large amount of noble metal loading. The noble metal is loaded on the surface of the carrier by a simple impregnation method, but the large amount of noble metal loading increases the cost of the catalyst; Ions are easy to aggregate to form large particles and affect catalyst activity; chloride ions and water vapor have a greater impact on the catalytic activity of noble metal catalysts. At the same time, the active components of noble metals are easy to lose during the reaction process, reducing the activity of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of noble metal deozonation catalyst, comprising the following steps:

[0022] (1) Preparation of gold sol core: prepare 5×10 -3 mol / L chloroauric acid solution, measure 200mL solution, stir mechanically (not too fast to avoid vortex formation) and heat to boiling (so that hydrogen chloride gas in the solution escapes), add 0.315g citric acid monohydrate, after ultrasonic for 20min , heated to boiling again, and kept for 10 minutes, then naturally cooled to obtain the core of the gold sol;

[0023] (2) Preparation of gold / platinum sol core-shell nanoparticles: the preparation concentration is 5×10 -2 mol / L chloroplatinic acid solution, measure 40mL of gold sol prepared in step (1), dilute to 400mL with deionized water, after heating to boiling, add 8mL of 5×10 - 2 mol / L chloroplatinic acid solution, boil again, then add 0.13g of citric acid monohydrate, after ultrasonication for 20min, keep boiling for 1h again, then cool naturally to obtain a gol...

Embodiment 2

[0026] A preparation method of noble metal deozonation catalyst, comprising the following steps:

[0027] (1) Preparation of gold sol core: prepare 5×10 -3 mol / L chloroauric acid solution, measure 200mL solution, heat to boiling, add 0.27g oxalic acid, after ultrasonication for 40min, heat to boiling again, and keep it for 15min, then naturally cool to get gold sol core;

[0028] (2) Preparation of gold / platinum sol core-shell nanoparticles: the preparation concentration is 5×10 -2 mol / L chloroplatinic acid solution, measure 40mL of gold sol prepared in step (1), dilute to 320mL with deionized water, after heating to boiling, add 16mL of 5×10 - 2 mol / L chloroplatinic acid solution, boil again, then add 0.22g oxalic acid, after ultrasonication for 40min, keep boiling for 2h again, then cool naturally to obtain gold / platinum sol core-shell nano particle;

[0029] (3) Preparation of finished gold / platinum@silica catalyst: Measure 150mL of gold / platinum sol prepared in step (2...

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Abstract

The invention discloses a preparation method of a noble metal deozone catalyst, which is characterized in that it comprises the following steps: (1) heating the first noble metal ion salt solution to boiling, adding a complexing agent, heating to boiling and cooling to obtain the noble metal sol inner core; (2) ) dilute the noble metal sol inner core and heat to boiling, add the second noble metal ion salt solution and boil again, then add complexing agent, after ultrasonic, keep boiling for 1-2h again; (3) add demulsifier and surfactant, stir After the surfactant is completely dissolved, add the inorganic silicon source dropwise, pour the solution into the reaction kettle, and let it stand for 12-16 hours at 110°C. After cooling down to room temperature, filter and wash it and dry it for 10-12 hours. Roasting at ‑600°C for 4‑6 hours, the finished noble metal deozonation catalyst can be obtained. The advantage is that it can effectively increase the specific surface area of ​​the catalyst and improve the activity of the catalyst.

Description

technical field [0001] The invention relates to a deozone catalyst, in particular to a preparation method of a noble metal deozone catalyst. Background technique [0002] Ozone absorbs harmful ultraviolet radiation in the stratosphere, but ozone is produced on the surface due to complex photochemical reactions between volatile organic compounds and nitrogen oxides. Non-thermal plasma technology and anion purification technology can remove indoor pollutants while also Ozone will be produced; in addition, air conditioners, printers, and copiers will also release ozone during use; the strong oxidizing properties of ozone make it suitable for the treatment of industrial wastewater and the desulfurization and denitrification of flue gas, but the exhaust gas still contains a large amount of ozone. The air quality standard of the People's Republic of China has made strict regulations on the indoor and outdoor ozone concentration: the indoor ozone concentration shall not exceed 0.08...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B01J23/66B01J35/10B01D53/86B01D53/66
CPCB01J23/66B01D53/8675B01D2258/0283B01J35/61Y02A50/20
Inventor郭谨玮赵伟张涵朱伟明张炜
Owner宁波智通环保科技有限公司