A mesoporous alumina-based core-shell composite material and its single micelle-guided interface assembly method and application

A technology of mesoporous alumina and composite materials, applied in chemical instruments and methods, alumina/aluminum hydroxide, nanotechnology for materials and surface science, etc. The thickness of the alumina shell is not uniform, and there is no mesoporous structure, etc., to achieve the effect of large pore size, large pore volume, and strong controllability

Active Publication Date: 2022-05-27
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the successful cases, due to the complexity and strong randomness of the hydrolytic crosslinking and crystallization process of the aluminum source, the thickness of the wrapped alumina shell is not uniform or there is no mesoporous structure, which limits its performance in applications. to play

Method used

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  • A mesoporous alumina-based core-shell composite material and its single micelle-guided interface assembly method and application
  • A mesoporous alumina-based core-shell composite material and its single micelle-guided interface assembly method and application
  • A mesoporous alumina-based core-shell composite material and its single micelle-guided interface assembly method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0046]Mix 1.5g F127 (surfactant), 75mL tetrahydrofuran and 12mL concentrated hydrochloric acid (36-38wt%), stir at room temperature for 30 minutes to obtain a clear and transparent mixed solution, then add 2.0g aluminum isopropoxide and continue stirring for one hour ; Transfer the mixed solution to a constant temperature drying box and place it at 40°C for 48h to obtain a white single micellar gel;

[0047] 1.0g of monomicellar gel and 100mg of phenolic resin spheres were dispersed in a mixed solution of 30mL of ethanol and 100mL of water, then transferred to a hydrothermal kettle for 24h at 160°C; the obtained product was washed with absolute ethanol, and then The phenolic resin microspheres@mesoporous alumina composite was obtained by calcining at 700 °C for 3 h under nitrogen protection atmosphere to remove the surfactant.

[0048] See figure 1 , in this example, the surfactant Pluronic F127 (EO 106 -PO 70 -EO 106 ) as the template agent, aluminum isopropoxide as the a...

Embodiment 2

[0054] Mix 1.5g F127, 75mL tetrahydrofuran and 12mL concentrated hydrochloric acid (36-38wt%), stir at room temperature for 30 minutes to obtain a clear and transparent mixed solution, then add 2.0g aluminum isopropoxide, continue stirring for one hour; transfer the mixed solution In a constant temperature drying box, placed at 40°C for 48h to obtain a white single micelle gel;

[0055] 1.0g of single micelle gel and 100mg of graphene were dispersed in a mixed solution of 30mL of ethanol and 100mL of water, then transferred to a hydrothermal kettle for 24h at 160 °C; the obtained product was washed with absolute ethanol, and then placed in a After calcination at 700 °C for 3 h to remove the surfactant, graphene@mesoporous alumina composites were obtained.

[0056] See Figure 7-8 , Figure 7 SEM images and Figure 8 Transmission electron microscopy images showed that the mesoporous alumina shell was uniformly and densely wrapped on graphene, with a pore size of ~5 nm.

Embodiment 3

[0058] Mix 1.5g F127, 75mL tetrahydrofuran and 12mL concentrated hydrochloric acid (36-38wt%), stir at room temperature for 30 minutes to obtain a clear and transparent mixed solution, then add 2.0g aluminum isopropoxide, continue stirring for one hour; transfer the mixed solution In a constant temperature drying box, placed at 40°C for 48h to obtain a white single micelle gel;

[0059] 1.0g of monomicellar gel and 100mg of phenolic resin spheres were dispersed in a mixed solution of 30mL of ethanol and 100mL of water, then transferred to a hydrothermal kettle for 24h at 160°C; the obtained product was washed with absolute ethanol, and then The surfactant was removed by calcining at 700℃ for 3h in air atmosphere, and hollow mesoporous alumina nanospheres were obtained.

[0060] See Figure 9 , Figure 9 TEM images showed that the hollow mesoporous alumina nanospheres were uniform in size, with a shell thickness of about ∼10 nm and a pore size of ∼5 nm.

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Abstract

The invention relates to a mesoporous alumina-based core-shell composite material and its single micelle-oriented interface assembly method and application thereof. The preparation method specifically comprises: dissolving an aluminum source, a surfactant, and an acid in an organic solvent to obtain a mixed solution ; dry the mixed solution to obtain a single micelle gel; mix the single micelle gel, functional core and organic alcohol aqueous solution for hydrothermal reaction, and the single micelle gel is wrapped on the surface of the functional core; finally high temperature roasting to remove surface activity agent to obtain the core-shell composite material with mesoporous alumina shell. The shell thickness of the core-shell composite material prepared by the present invention is 5-500nm, the mesopore diameter is 2-50nm, and the specific surface area is 50-1200m 2 / g. The preparation method has strong universality and is applicable to a series of functional cores with different sizes, shapes and compositions.

Description

technical field [0001] The invention belongs to the technical field of functional material preparation, and relates to a mesoporous alumina-based core-shell composite material and a method for assembling a single micelle-oriented interface thereof and its application. Background technique [0002] In the field of advanced nanocomposites, core-shell composites are increasingly favored because they can effectively combine different components at the nanoscale to achieve synergistic effects among multiple components. . Further, through rational design, the introduction of mesoporous structure into the shell layer can improve the specific surface area of ​​the composite and the accessibility of the functional core. In the past decade, researchers have developed a series of methods to construct mesoporous shells with different functional cores, and explored the application of core-mesoporous-shell composites in the fields of energy storage and catalysis. At present, people can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02C01B32/194B82Y30/00B82Y40/00B01J21/18B01J21/04B01J31/06B01J35/08B01J35/10B01J37/10C08L61/06C08K7/24
CPCC01F7/02C01B32/194B82Y30/00B82Y40/00B01J21/18B01J21/04B01J31/06B01J35/08B01J35/023B01J35/10B01J35/1014B01J35/1019B01J35/1023B01J35/1028B01J35/1057B01J35/1061B01J37/10C08K7/24C01P2004/80C01P2004/64C01P2004/62C01P2006/12C01P2006/16C01P2004/32C01P2004/34C08L61/06
Inventor 李伟张威朱科润赵东元
Owner FUDAN UNIV
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