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A class of metal oxide materials with special microstructure, and preparation method thereof

A microstructure and oxide technology, applied in the field of materials, can solve the problems of high risk, difficult operation, inability to synthesize metal oxide materials, etc., and achieve the effect of mild reaction conditions

Active Publication Date: 2019-08-06
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If chlorine gas is used to etch titanium carbide (TiC) or silicon carbide (SiC) to remove the metal therein, a porous carbon material with a single pore size distribution can be obtained; or Ti 3 AlC 2 Al is etched out to get Ti 3 C 2 materials; however, the above method is difficult to operate, highly dangerous and limited in scope of application, and cannot be used for the synthesis of metal oxide materials with special morphology and structure

Method used

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  • A class of metal oxide materials with special microstructure, and preparation method thereof
  • A class of metal oxide materials with special microstructure, and preparation method thereof
  • A class of metal oxide materials with special microstructure, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 0.5 g of ruthenium-doped strontium titanate SrRu synthesized by hydrothermal method 0.05 Ti 0.95 o 3 Put it into a 50mL high temperature and high pressure reactor, add 1molL -1 Hydrochloric acid aqueous solution, after stirring evenly, seal the reactor and put it in a constant temperature oven at 130°C to react for 10 days. During the reaction, the hydrochloric acid will etch out the strontium in the raw material and dissolve it into the aqueous solution. After opening at room temperature, the precipitate was separated by filtration, washed 3 times with deionized water, and then dried with a freeze dryer for 24 hours to obtain a brown product that is ruthenium-doped titanium dioxide Ru 0.05 Ti 0.95 o 2 .

[0032] Product ruthenium doped titania Ru 0.05 Ti 0.95 o 2 The TEM, XRD, nitrogen adsorption-desorption isotherms and the SEM and XRD of raw materials are attached Figure 1-3 shown.

Embodiment 2

[0034] Weigh 0.5 g of ruthenium-doped strontium titanate SrRu synthesized by hydrothermal method 0.05 Ti 0.95 o 3 Put it into a 50mL high temperature and high pressure reactor, add 1molL -1 Hydrochloric acid aqueous solution, after stirring evenly, seal the reactor and put it in a constant temperature oven at 130°C to react for 150 minutes. During the reaction, the hydrochloric acid will etch the strontium in the raw material and dissolve it into the aqueous solution. After opening at room temperature, the precipitate was separated by filtration, washed 3 times with deionized water, and then dried with a freeze dryer for 24 hours to obtain a brown product that is ruthenium-doped titanium dioxide Ru 0.05 Ti 0.95 o 2 .

[0035] Product ruthenium doped titania Ru 0.05 Ti 0.95 o 2 TEM, XRD, nitrogen adsorption-desorption isotherm and SEM and XRD of raw materials are attached Figure 1-3 shown. Implementation Example 3

Embodiment 3

[0036] Weigh 0.5 g of ruthenium-doped strontium titanate SrRu synthesized by hydrothermal method 0.05 Ti 0.95 o 3 Put it into a 50mL high temperature and high pressure reactor, add 1molL -1 Hydrochloric acid aqueous solution, after stirring evenly, seal the reactor and put it in a constant temperature oven at 60°C to react for 5 minutes. During the reaction, the hydrochloric acid will etch the strontium in the raw material and dissolve it into the aqueous solution. After opening at room temperature, the precipitate was separated by filtration, washed 3 times with deionized water, and then dried with a freeze dryer for 24 hours to obtain a brown product that is ruthenium-doped titanium dioxide Ru 0.05 Ti 0.95 o 2 .

[0037] Product ruthenium doped titania Ru 0.05 Ti 0.95 o 2 TEM, XRD, nitrogen adsorption-desorption isotherm and SEM and XRD of raw materials are attached Figure 1-3 shown. Implementation example 4:

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Abstract

The invention relates to a class of metal oxide materials with a special microstructure, and a preparation method thereof, and belongs to the field of materials. A purpose of the present invention isto solve the problem of large-scale and low-cost production of high-performance metal oxides for energy storage and catalysis. According to the present invention, a multi-component metal oxide AxMyOz(A represents one or a plurality of elements selected from elements with strong metallicity, M represents one or a plurality of elements selected from transition metal elements or germanium, antimony,indium and other elements with weak metallicity, and O represents oxygen) is used as a raw material, and is subjected to A site element removing through etching with an acidic solution (an aqueous solution or organic solution with a pH value of less than 7) to prepare the metal oxide material, wherein a variety of microstructures such as an amorphous porous material, a mono-dispersed nano-crystalmaterial, a self-assembled nanometer hairball-like material, a porous nano-crystal material, a hollow material, a core-shell structure material and the like can be obtained by controlling experimental conditions. According to the present invention, the method is simple and effective, and does not require complicated post-treatment process, and the product can be widely used in the fields of industrial reaction catalysts or catalyst carriers and new energy.

Description

technical field [0001] The invention relates to a metal oxide material with a special microstructure and a preparation method thereof, in particular to a method for synthesizing metal oxides by acid etching multiple metal oxides, which belongs to the field of materials. Background technique [0002] Metal oxides are commonly used functional materials and are hot research materials in academia and industry. Nanoscale or metal oxide materials with special structures (such as porous structure, hollow structure, etc.) have attracted much attention due to their superior performance far beyond ordinary bulk materials. However, at present, the preparation methods of metal oxide materials are limited to the bottom-up method, and the preparation of metal oxide materials with special morphology and structure (such as porous structure, hollow structure, etc.) usually requires the addition of a large number of templates or Ancillary reagents are therefore costly and not suitable for la...

Claims

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Application Information

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IPC IPC(8): C01G23/047C01G25/02C01G33/00C01G55/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/047C01G25/02C01G33/00C01G55/004C01P2002/72C01P2004/03C01P2004/04C01P2004/32C01P2004/64C01P2006/12
Inventor 黄富强董武杰农淑英刘子超
Owner PEKING UNIV
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