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Three-dimensional sequential macroporous Co3O4 loaded nanometer Au catalyst as well as preparation method and application thereof

A three-dimensional ordering and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., to achieve the effect of cheap raw materials, controllable pore size, and simple preparation process

Inactive Publication Date: 2013-09-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no literature or patent has reported the preparation of transition metal oxide-supported noble metal catalyst Au / 3DOM Co 3 o 4

Method used

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  • Three-dimensional sequential macroporous Co3O4 loaded nanometer Au catalyst as well as preparation method and application thereof
  • Three-dimensional sequential macroporous Co3O4 loaded nanometer Au catalyst as well as preparation method and application thereof
  • Three-dimensional sequential macroporous Co3O4 loaded nanometer Au catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Add 20mmol of cobalt nitrate hexahydrate to 9mL of anhydrous methanol and stir for 10min, add 1mL of polyethylene glycol 400 to the uniformly mixed precursor solution, stir at room temperature for 30min, then add an appropriate amount of PMMA hard template, and immerse at room temperature for 3h. Filter, dry at room temperature for 24 hours, and get 3DOM Co after roasting 3 o 4 carrier. The roasting conditions are: (1) in N 2 Under the atmosphere, the temperature was raised from room temperature to 300°C at a rate of 1°C / min, and kept for 3 hours, and then naturally lowered to room temperature; Raise to 450°C at a rate of 1°C / min, keep for 3 hours and then cool down to room temperature naturally.

[0023] (2) Ice-water bath and light-proof environment: Take 13.54mL chloroauric acid aqueous solution (1.5mmol / L) and add it to 1.33mL PVA aqueous solution (2.0mg / mL) (Au / PVA mass ratio = 1.5:1), and stir evenly 10min, followed by rapid addition of 1.92mL NaBH 4 Aque...

Embodiment 2

[0026] (1) Add 20mmol of cobalt nitrate hexahydrate to 9mL of anhydrous methanol and stir for 10min, add 1mL of polyethylene glycol 400 to the uniformly mixed precursor solution, stir at room temperature for 30min, then add an appropriate amount of PMMA hard template, and immerse at room temperature for 3h. Filter, dry at room temperature for 24 hours, and get 3DOM Co after roasting 3 o 4 carrier. The roasting conditions are: (1) in N 2 Under the atmosphere, the temperature was raised from room temperature to 300°C at a rate of 1°C / min, and kept for 3 hours, and then naturally lowered to room temperature; Raise to 450°C at a rate of 1°C / min, keep for 3 hours and then cool down to room temperature naturally.

[0027] (2) Ice-water bath and light-proof environment: Take 27.08mL chloroauric acid aqueous solution (1.5mmol / L) and add it to 2.67mL PVA aqueous solution (2.0mg / mL) (Au / PVA mass ratio = 1.5:1), and stir evenly 10min, followed by rapid addition of 3.84mL NaBH 4 Aque...

Embodiment 3

[0030] (1) Add 20mmol of cobalt nitrate hexahydrate to 9mL of anhydrous methanol and stir for 10min, add 1mL of polyethylene glycol 400 to the uniformly mixed precursor solution, stir at room temperature for 30min, then add an appropriate amount of PMMA hard template, and immerse at room temperature for 3h. Filter, dry at room temperature for 24 hours, and get 3DOM Co after roasting 3 o 4 carrier. The roasting conditions are: (1) in N 2 Under the atmosphere, the temperature was raised from room temperature to 300°C at a rate of 1°C / min, and kept for 3 hours, and then naturally lowered to room temperature; Raise to 450°C at a rate of 1°C / min, keep for 3 hours and then cool down to room temperature naturally.

[0031] (2) Ice-water bath and light-proof environment: Take 40.62mL chloroauric acid aqueous solution (1.5mmol / L) and add it to 4.00mL PVA aqueous solution (2.0mg / mL) (Au / PVA mass ratio = 1.5:1), and stir evenly 10min, followed by rapid addition of 5.76mL NaBH 4 Aque...

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Abstract

The invention relates to a three-dimensional sequential macroporous Co3O4 loaded nanometer Au catalyst as well as a preparation method and an application thereof, and belongs to a transition metal oxide loaded nanometer noble metal catalyst. The pore wall of Co3O4 with a 3DOM structure is supported with cubic phase Au nanometer particles. According to the preparation method, 3DOM Co3O4 is prepared by a polyethyleneglycol 400 assisted PMMA (polymethyl methacrylate) colloidal crystal template method, and then a gold nanometer adhesive is loaded on 3DOM Co3O4 by using a polyvinyl alcohol protection bubble reduction method, so that Au / 3DOM Co3O4 is obtained. The raw materials of the three-dimensional sequential macroporous Co3O4 loaded nanometer Au catalyst is cheap in price and can be easily obtained, the preparation process is simple, and the product obtained by the preparation method is controllable in shape, size and pore diameter.

Description

technical field [0001] The invention relates to a colloidal crystal template method and a polyvinyl alcohol-protected bubbling reduction method to prepare Co with a three-dimensional ordered macropore (3DOM) structure. 3 o 4 and its loaded gold (Au / 3DOM Co 3 o 4 ) catalyst preparation method, and the catalytic performance for the oxidation of CO and volatile organic compounds, specifically related to the preparation of 3DOM structures by polymethyl methacrylate (PMMA) colloidal crystal template method and polyvinyl alcohol-protected bubbling reduction method, respectively Co 3 o 4 and Au / 3DOM Co 3 o 4 The preparation method of the catalyst, as well as the catalytic performance for the oxidation of CO and toluene, belong to the transition metal oxide supported nanometer precious metal catalyst. Background technique [0002] Industrial waste gas [such as volatile organic compounds (VOCs), etc.] pollutes the atmosphere and endangers human health. Catalytic combustion is...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01D53/90B01D53/62B01D53/72
CPCY02A50/20
Inventor 戴洪兴谢少华邓积光姜洋韩文
Owner BEIJING UNIV OF TECH
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