Preparation method of mesoporous metal composite oxide nanomaterial with adjustable aperture

A technology of metal composites and nanomaterials, applied in chemical instruments and methods, manganese compounds, cobalt compounds, etc., can solve the problems of restricting widespread use and complicated process flow, and achieve the goal of easy operation, cheap and easy-to-obtain raw materials, and wide application prospects Effect

Inactive Publication Date: 2019-03-08
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation methods of these mesoporous metal composite oxidation are all completed by hydrothermal, gel and other processes, and the process is relatively complicated, which limits the widespread use of these methods

Method used

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  • Preparation method of mesoporous metal composite oxide nanomaterial with adjustable aperture
  • Preparation method of mesoporous metal composite oxide nanomaterial with adjustable aperture
  • Preparation method of mesoporous metal composite oxide nanomaterial with adjustable aperture

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Grind cerium nitrate, cobalt nitrate, and citric acid separately to fine powder, then mix and grind them in a certain proportion for 30 minutes to obtain a very fine powder precursor, spread the precursor evenly in a crucible, and put it into a tubular high-temperature furnace Inside, 15 ml / min of air was introduced, and the temperature was raised to 120 °C at a heating rate of 1 °C / min and kept for 100 minutes, then continued to be heated at a heating rate of 1 °C / min to 450 °C and kept for 200 min, and then taken out after natural cooling The samples were washed three times with deionized water and absolute ethanol, and then dried in an oven at 60 °C for 100 minutes to obtain mesoporous CeCoO x Composite oxide nanoparticles are denoted as A2. The specific surface area and average pore diameter are 145 m 2 / g and 9.0 nm. Wherein the molar ratio of cerium nitrate, cobalt nitrate and citric acid used is 1:1:2 successively.

Embodiment 2

[0037] Mesoporous CeCoO was prepared according to the method of Example 1 x Composite oxide nanomaterials, denoted as A4, have a specific surface area and an average pore diameter of 163 m 2 / g and 8.4 nm. The difference is that the molar ratio of cerium nitrate, cobalt nitrate and citric acid used is 1:1:8 in sequence; the burning temperature is 500°C.

Embodiment 3

[0039] Mesoporous CeCoO was prepared according to the method of Example 1x Composite oxide nanomaterials, denoted as A5, have a specific surface area and an average pore diameter of 150 m 2 / g and 7.7 nm. The difference is that the selected burning atmosphere is nitrogen.

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Abstract

The invention belongs to the field of preparation of mesoporous nanomaterials and particularly relates to a preparation method of a mesoporous metal composite oxide nanomaterial with adjustable aperture. The preparation method is implemented by the following steps: firstly, respectively weighing metal salt and an auxiliary, grinding, uniformly mixing the two substances and grinding again to obtaina mixture precursor; secondly, putting the mixture precursor in the first step into a high temperature furnace, and carrying out programmed temperature and heating in the atmosphere of air or nitrogen; then carrying out programmed temperature again and continuing heating and naturally cooling to obtain a head product; thirdly, washing and drying the head product in the second step to obtain a target product. The preparation method has the advantages of low cost, simple process, easiness in operation, wide aperture distribution range of the target product and large specific surface area.

Description

technical field [0001] The invention belongs to the field of preparation of mesoporous nanomaterials, in particular to a method for preparing mesoporous metal composite oxide nanomaterials with adjustable apertures. Background technique [0002] Materials with a pore size distribution between 2 and 50 nm belong to mesoporous materials. Due to the large specific surface area of ​​mesoporous materials, excellent surface and bulk properties, wide range of pore size distribution, and high adsorption and diffusion capabilities, they can be used in separation , adsorption, catalysis, materials and electrochemistry have broad application prospects. [0003] The research on mesoporous metal composite oxides has received extensive attention. Due to the strong oxygen storage performance of the rare earth cerium component, the cerium-based mesoporous metal composite oxides can be used in the fields of oxidation and removal of volatile organic compounds. As nanoparticles, their shape a...

Claims

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Application Information

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IPC IPC(8): C01G51/00C01G45/00B82Y40/00
CPCB82Y40/00C01G45/12C01G51/70C01P2002/72C01P2004/03C01P2004/04C01P2006/12C01P2006/16
Inventor 夏云生刘晶高子程赵莹莹
Owner BOHAI UNIV
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