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Mesoporous silica/anodic aluminum oxide heterojunction membrane as well as super-assembly preparation method and application thereof

A technology of anodized aluminum and mesoporous silicon oxide, applied in mechanical equipment, liquid chemical plating, machines/engines, etc., can solve problems such as unfavorable energy capture and increased ion transmission resistance

Active Publication Date: 2020-10-09
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current research is always facing some problems, such as thicker membrane structure, irregular pores, etc., which increase the resistance of ion transmission, which is not conducive to energy capture.

Method used

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  • Mesoporous silica/anodic aluminum oxide heterojunction membrane as well as super-assembly preparation method and application thereof
  • Mesoporous silica/anodic aluminum oxide heterojunction membrane as well as super-assembly preparation method and application thereof
  • Mesoporous silica/anodic aluminum oxide heterojunction membrane as well as super-assembly preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This example describes in detail the mesoporous silica / anodized alumina heterojunction, its preparation method and application.

[0051] In step S0, an AAO film with a diameter of 15 mm, a thickness of 60 μm, and a pore diameter of 80 nm is used as a base, and 8 wt % polymethyl methacrylate (PMMA) is used to spin-coat the surface of the anodized aluminum film to plug the pores, and then polished for later use .

[0052] Step 1, prepare the silicon precursor solution: Weigh 0.9g of the template agent F127 and dissolve it in 10g of absolute ethanol to obtain the template agent solution, mix 0.4g of 0.1M dilute hydrochloric acid, 0.5g of deionized water and 10.0g of After mixing absolute ethanol, stir magnetically to obtain a mixed solution, then slowly add 2.08g of silicon source tetraethyl orthosilicate (TEOS) dropwise into the mixed solution, stir at room temperature for 30min, and then heat at 60°C for 1h to obtain a silica gel. After cooling to room temperature, the ...

Embodiment 2

[0060] This example describes in detail the MS / AAO heterogeneous conjunctiva, preparation method and application.

[0061] In this embodiment, except for the spin-coating step, other operations are the same as those in Embodiment 1, and will not be repeated here.

[0062] The mass molar ratio of template agent F127 to tetraethyl orthosilicate is 90 g / mol.

[0063] In step 2, the silicon precursor solution is spin-coated on one side of the AAO with plugged pores at a speed of 1000 r to obtain a composite membrane. The time for one spin coating is 30s, and the number of spin coatings is 2 times.

Embodiment 3

[0065] This example describes in detail the MS / AAO heterogeneous conjunctiva, preparation method and application.

[0066] In this embodiment, except for the spin-coating step, other operations are the same as those in Embodiment 1, and will not be repeated here.

[0067] The mass molar ratio of template agent F127 to tetraethyl orthosilicate is 90 g / mol.

[0068] Step 2: Spin-coat the silicon precursor solution onto one side of the AAO with plugged pores at a speed of 2000 r to obtain a composite membrane. The time for one spin coating is 30s, and the number of spin coatings is 3 times.

[0069] The MS / AAO heterogeneous conjunctiva prepared in Examples 2 and 3 were tested, and the test results are shown in Figure 5 , 7 .

[0070] Figure 5 It is a scanning electron microscope image of the mesoporous silicon oxide / anodized aluminum oxide heterojunction film in Examples 2 and 3 of the present invention; Figure 6 It is a cross-sectional scanning electron microscope image...

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Abstract

The invention belongs to the technical field of membranes, and particularly relates to a mesoporous silica / anodic aluminum oxide heterojunction membrane as well as a super-assembly preparation methodand application thereof. The hydrogen bonding force between silica and surface of anodic aluminum oxide is used, the anodic aluminum oxide is used as a substrate, by means of a spin-coating method, alayer of ultrathin, regular, ordered and thickness-controllable mesoporous silica film on the anodic aluminum oxide substrate through an interface super-assembly and evaporation-induced self-assemblyconstruction strategy, and therefore the mesoporous silica / anodic aluminum oxide heterojunction membrane is obtained. The heterojunction membrane comprises a negatively charged mesoporous channel withsmall mesoporous silica and a positively charged nano channel with the anodic aluminum oxide, so that abundant transmission channels are provided for ions; and the bipolar membrane structure with different charges can provide abundant channels for ion transmission, so that the internal resistance of ion transmission is greatly reduced, and the application in the aspect of energy capture is facilitated. Meanwhile, the invention provides a method for constructing a nano-fluidic device with ion selectivity and salinity difference energy capture, and a new idea is provided for constructing a solid-state nano-channel membrane.

Description

technical field [0001] The invention belongs to the field of membrane technology, and in particular relates to a mesoporous silicon oxide / anodized aluminum oxide heterogeneous junction film, a super-assembly preparation method and an application thereof. Background technique [0002] Energy is a hot issue facing the world today. With the depletion of fossil energy, human beings urgently need to find a new, clean and renewable energy. With the continuous utilization of lithium-ion batteries, solar energy, and wind energy, energy problems have been alleviated to a certain extent, but new energy sources need to be continuously explored to meet people's growing energy needs. Salt difference energy refers to the Gibbs free energy that exists between electrolytes of different concentrations. It widely exists in rivers, lakes, and seas. Scientists estimate that if this salt difference energy can be effectively used, 2TW of electrical energy will be generated. Equivalent to the ene...

Claims

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Application Information

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IPC IPC(8): C23C18/12C25D11/24F03G7/00
CPCC23C18/1208C23C18/1245C23C18/1254C25D11/246F03G7/005
Inventor 孔彪周姗谢磊曾洁刘占杰陈海涛
Owner FUDAN UNIV
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