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Method for in-situ construction of hierarchical pore carbon material and synchronous loading of noble metal nano catalyst in porous mineral

A nano-catalyst, porous mineral technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve great application prospects, efficient and stable catalytic formaldehyde performance, reduce production cost effect

Inactive Publication Date: 2022-01-28
CHINA UNIV OF GEOSCIENCES (BEIJING) +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the preparation of noble metal nanocatalysts supported by in situ structured hierarchically porous carbon materials in porous minerals.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Soak 3g of natural zeolite powder in 90ml of 0.04M hydrochloric acid solution, magnetically stir at room temperature for 3h, then centrifuge and wash until neutral, and dry at 70°C for 720min.

[0025] (2) Prepare 60ml of 1g / ml polyvinyl alcohol aqueous solution, weigh a certain amount of chloroplatinic acid, mix and stir the two to obtain a chloroplatinic acid precursor solution, the concentration of chloroplatinic acid is 10mmol.

[0026] (3) Take 2 g of the pretreated carrier in step (1), immerse the carrier in the chloroplatinic acid precursor solution, vacuum immerse for 3 hours, and freeze-dry for 48 hours.

[0027] (4) Place the precursor obtained in step (3) in a tube furnace with an initial temperature of room temperature, pass through a nitrogen-hydrogen mixed atmosphere, heat treatment at a temperature of 600°C for 2 hours at a heating rate of 3°C / min to obtain In situ construction of hierarchically porous carbon materials in zeolites and simultaneous loa...

Embodiment 2

[0029] (1) Soak 3g of natural zeolite powder in 90ml of 0.04M hydrochloric acid solution, magnetically stir at room temperature for 3h, then centrifuge and wash until neutral, and dry at 70°C for 720min.

[0030] (2) Prepare 60ml of 1g / ml polyoxyethylene aqueous solution, weigh a certain amount of chloroplatinic acid, mix and stir the two to obtain a chloroplatinic acid precursor solution, the concentration of chloroplatinic acid is 10mmol.

[0031] (3) Take 2 g of the pretreated carrier in step (1), immerse the carrier in the chloroplatinic acid precursor solution, vacuum immerse for 3 hours, and freeze-dry for 48 hours.

[0032] (4) Place the precursor obtained in step (3) in a tube furnace with an initial temperature of room temperature, pass through a nitrogen-hydrogen mixed atmosphere, heat treatment at a temperature of 600°C for 2 hours at a heating rate of 3°C / min to obtain In situ construction of hierarchically porous carbon materials in zeolites and simultaneous loadi...

Embodiment 3

[0034] (1) Immerse 3g of sepiolite in 90ml of 0.04M hydrochloric acid solution, magnetically stir at room temperature for 5h, then centrifuge and wash until neutral, and dry at 70°C for 720min.

[0035] (2) Prepare 60ml of 1g / ml polyoxyethylene aqueous solution, weigh a certain amount of chloroplatinic acid, mix and stir the two to obtain a chloroplatinic acid precursor solution, the concentration of chloroplatinic acid is 10mmol.

[0036] (3) Take 2 g of the pretreated carrier in step (1), immerse the carrier in the chloroplatinic acid precursor solution, vacuum immerse for 3 hours, and freeze-dry for 48 hours.

[0037] (4) Place the precursor obtained in step (2) in a tube furnace with an initial temperature of room temperature, pass through a nitrogen-hydrogen mixed atmosphere, heat-treat at a temperature of 600°C for 2 hours at a heating rate of 3°C / min to obtain In situ construction of hierarchically porous carbon materials in modified sepiolite and simultaneous loading o...

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Abstract

The invention discloses a method for in-situ construction of a hierarchical porous carbon material and synchronous loading of a noble metal nano catalyst in a porous mineral, and belongs to the technical field of nano catalytic material preparation. The method comprises the following steps: pretreating porous minerals with an acid or alkali solution, preparing an aqueous solution containing a water-soluble polymer by taking noble metal salt as a raw material, mixing and stirring the two aqueous solutions to obtain a precursor solution containing noble metal ions, adding the treated porous minerals into the precursor solution, and performing vacuum impregnation and drying to obtain a metal ion / polymer / porous mineral precursor; and enabling that the precursor is subjected to in-situ carbonization and reduction in the high-temperature heat treatment process, so that the hierarchical porous carbon material is constructed in situ in the porous structure of the porous mineral, the noble metal nano-catalyst is synchronously loaded, and the porous material has excellent catalytic performance, is environment-friendly and has a wide application prospect.

Description

technical field [0001] The invention relates to a method for in-situ constructing a hierarchical porous carbon material in a porous mineral and synchronously supporting a noble metal nano-catalyst, which belongs to the technical field of preparing nano-catalyzed materials. Background technique [0002] 80% of people's daily activities are carried out indoors. Therefore, the indoor pollution caused by interior decoration and building materials has gradually attracted people's attention and attention. Among indoor air pollutants, the problem of formaldehyde is particularly prominent. Studies have found that long-term exposure to formaldehyde will reduce the body's respiratory function and affect the body's immune response. Inhalation of high concentrations of formaldehyde by humans can lead to bronchial asthma, pneumonia and other respiratory diseases. The health hazards of formaldehyde have caused more and more people in recent years. How to efficiently purify and eliminate f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/46B01J23/50B01J23/52B01J35/04B01D53/86B01D53/72
CPCB01J23/42B01J23/44B01J23/52B01J23/468B01J23/464B01J23/462B01J23/50B01D53/8668B01D2257/708B01J35/393B01J35/56
Inventor 周怡笛闵鑫王丽娟房明浩吴小文刘艳改黄朝晖吴小贤侯喜锋
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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