Mesoporous metal oxide hollow material with high specific surface area and preparation method thereof

A high specific surface area, mesoporous silica technology, used in the preparation/processing of rare earth metal compounds, rare earth metal oxides/hydroxides, lanthanide oxides/hydroxides, etc., can solve the problem of small pore volume. , low specific surface area of ​​mesoporous metal oxides, etc., to achieve the effects of large pore volume, simple preparation method and broad application prospects

Pending Publication Date: 2021-10-15
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present application provides a preparation method of mesoporous metal oxide hollow material with high specific surface area to solve the probl

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  • Mesoporous metal oxide hollow material with high specific surface area and preparation method thereof
  • Mesoporous metal oxide hollow material with high specific surface area and preparation method thereof
  • Mesoporous metal oxide hollow material with high specific surface area and preparation method thereof

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preparation example Construction

[0042] figure 1 It is a schematic flow chart of the preparation method of the mesoporous metal oxide hollow material with high specific surface area provided by the embodiment of the present application, refer to figure 1 , the preparation method provided by the embodiment of the present application comprises the following steps:

[0043] Step S101, configure the inorganic metal salt precursor solution: add the inorganic metal salt into the solvent to dissolve, and obtain a uniform inorganic metal salt precursor solution; the inorganic metal salt is selected from ferric nitrate, copper nitrate, manganese nitrate, cerium nitrate, nickel nitrate, nitric acid A mixture of any one or more of cobalt, chromium nitrate, phosphotungstic acid or phosphomolybdic acid; the solvent is any one or more of water, ethanol, methanol, ethylene glycol, glycerol or tetrahydrofuran , the solvent can also be selected from any one or a combination of hydrochloric acid, acetic acid or nitric acid; ...

Embodiment 1

[0055] Embodiment 1 of the present application provides a method for preparing a mesoporous metal oxide hollow material, comprising the following steps:

[0056] Step S101, dissolving 7.5g of ferric nitrate in 2.5g of ethanol-ethylene glycol aqueous solution, stirring and dissolving to form a transparent ferric nitrate precursor solution; in ethanol-ethylene glycol aqueous solution, the volume ratio of ethanol, ethylene glycol and water is 1 :1:1;

[0057] In step S102, 0.20 g of ferric nitrate precursor solution is added dropwise to 0.5 g of SBA-15-OH template in 3 times, fully stirred for 10 minutes after each drop, and after the drop is completed, the obtained reaction system is sealed, and then standing in an oven at 70°C for 12 hours, and then standing in an oven at 90°C for 24 hours to obtain a metal salt-silicon dioxide composite;

[0058] Step S103, transfer the metal salt-silicon dioxide composite to a muffle furnace, raise the muffle furnace from room temperature to...

Embodiment 2

[0062] Embodiment 2 of the present application provides a method for preparing a mesoporous metal oxide hollow material, comprising the following steps:

[0063] Step S101, dissolving 3.4g of cerium nitrate in 1.6g of hydrochloric acid solution with a concentration of 1.07mol / L, stirring and dissolving to form a transparent cerium nitrate precursor solution;

[0064] Step S102, weighing 0.38g of cerium nitrate precursor solution and adding dropwise to 0.5gSBA-15-OH template in 3 times, fully stirring for 10 minutes after each dropwise addition, after the dropwise addition, the obtained reaction system was sealed, and then First stand in an oven at 90°C for 20 hours, and then in an oven at 120°C for 12 hours to obtain a metal salt-silicon dioxide composite;

[0065] Step S103, transfer the metal salt-silicon dioxide composite to a tube furnace, raise the temperature from room temperature to 450°C at a rate of 3°C / min in an ammonia-nitrogen mixed gas atmosphere, and calcinate for ...

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Abstract

The invention relates to the field of synthesis of inorganic nano materials, in particular to a mesoporous metal oxide hollow material with a high specific surface area and a preparation method thereof. The preparation method provided by the invention comprises the following steps: adding an inorganic metal salt into a solvent, and dissolving to obtain an inorganic metal salt precursor solution; dropwise adding an inorganic metal salt precursor solution into the mesoporous silica template, uniformly stirring, and drying to obtain a metal salt-silica compound; calcining the metal salt-silicon dioxide compound, then adding a sodium hydroxide solution to remove the template, and then centrifuging, washing and drying to obtain the mesoporous metal oxide hollow material. The mesoporous metal oxide hollow material prepared by the method has an ultrahigh specific surface area, a large pore volume and a nanotube array structure.

Description

technical field [0001] The application relates to the field of synthesis of inorganic nanomaterials, in particular to a mesoporous metal oxide hollow material with a high specific surface area and a preparation method thereof. Background technique [0002] Mesoporous metal oxides have the advantages of high specific surface area, uniform and adjustable pore size, high pore volume and rich composition, so they have attracted extensive attention from researchers. The current methods for preparing mesoporous metal oxides mainly include soft template method and hard template method. The soft-template method uses surfactants as structure-directing agents to synthesize mesoporous metal oxide materials. However, the mesoporous metal oxides prepared by the soft-template method have metal-inorganic salt precursors that are easily hydrolyzed and cannot be well regulated with surfactants. Therefore, it is difficult to obtain highly crystalline mesoporous metal oxides by the soft templ...

Claims

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Application Information

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IPC IPC(8): C01G49/06C01F17/10C01F17/235C01G45/02
CPCC01G49/06C01F17/10C01F17/235C01G45/02C01P2006/12C01P2006/16C01P2006/14C01P2004/64C01P2002/72C01P2004/04
Inventor 顾栋彭渝浩
Owner WUHAN UNIV
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