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Two-dimensional/one-dimensional heterogeneous nanochannel membrane, its preparation method and application

A nano-channel, heterogeneous technology, applied in the energy field, can solve the problems of complex membrane material preparation process, high manufacturing cost, low efficiency, etc., and achieve the effects of high energy conversion capacity, increased flux, and reduced thickness

Active Publication Date: 2021-01-22
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 not perfect, and there are still problems such as complex preparation process of membrane materials, high manufacturing cost, and low efficiency.

Method used

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  • Two-dimensional/one-dimensional heterogeneous nanochannel membrane, its preparation method and application
  • Two-dimensional/one-dimensional heterogeneous nanochannel membrane, its preparation method and application
  • Two-dimensional/one-dimensional heterogeneous nanochannel membrane, its preparation method and application

Examples

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Effect test

Embodiment 1

[0030] This embodiment provides a two-dimensional / one-dimensional heterogeneous nanochannel membrane and a preparation method thereof.

[0031] A method for preparing a two-dimensional / one-dimensional heterogeneous nanochannel membrane, specifically comprising the following steps:

[0032] Step 1, modifying graphene oxide. That is, 0.02g-0.05g graphene oxide is dissolved in 10mL of 0.5wt% piperazine aqueous solution, and the ultrasonic power is 70%-90% at room temperature for 2.5h-3h to obtain a uniformly dispersed first solution. Wherein, the graphene oxide is single-layer graphene oxide, with a sheet diameter of 0.5 μm˜5 μm and a thickness of 0.8 nm˜1.2 nm.

[0033] In this embodiment, the mass of graphene oxide is 0.03g, the ultrasonic power is 80%, and the ultrasonic time is 3h.

[0034] Step 2: Add the first solution dropwise to the upper layer of the porous aluminum oxide film, and after the solvent evaporates naturally at room temperature for 2h to 5h, a first composi...

Embodiment 2

[0043] This example is to test the ion transport performance of the two-dimensional / one-dimensional heterogeneous nanochannel membrane prepared in Example 1.

[0044] image 3 It is a structural schematic diagram of the ion transport performance testing device in the second embodiment of the present invention. in, image 3 (a) is a double semi-conductivity cell, image 3 (b) is a photo of the test silicon wafer.

[0045] The ion transmission performance test adopts such as image 3 The ion transport performance test device shown in the figure includes: two semi-conductivity cells, a two-dimensional / one-dimensional heterogeneous nanochannel membrane sandwiched between the two conductivity cells, silicon wafers are placed on both sides of the membrane, and there is a small window in the middle of the silicon wafer , using a silicon wafer to determine the ion transport area as 3×10 -8 m 2 . During the test, two silver-silver chloride electrodes were used, and a picoammeter...

Embodiment 3

[0054] This example is to apply the two-dimensional / one-dimensional heterogeneous nanochannel membrane prepared in Example 1 to the salt difference energy conversion test.

[0055] The experimental device is still image 3 (a) The dual-semiconductance cell shown in (a) uses silver-silver chloride electrodes, and the magnitude of the current is monitored using a picoammeter. During the test, 0.5M NaCl solution was used to simulate seawater, and 0.01M NaCl solution was used to simulate fresh water. Put high-concentration seawater into the conductivity cell on the side of the functionalized GO membrane and connect it to the positive electrode of the picoammeter; put fresh water into the conductivity cell on the side of the functionalized AAO membrane and connect it to the picoammeter the negative pole. The electrical energy converted from the salt difference energy is exported to the external circuit, and the resistance box is used to simulate the circuit device. By adjusting t...

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Abstract

The invention provides a preparation method of a two-dimensional / one-dimensional heterogeneous nanochannel film. The method is characterized by comprising the following steps that step 1, graphene oxide is dissolved in an aqueous piperazine solution, and ultrasonic treatment is performed at the room temperature to obtain a uniformly dispersed first solution; step 2, the first solution is added dropwise to the upper layer of a porous aluminum oxide film, and after the solvent is evaporated at the room temperature, a first composite film with a graphene oxide film layer and a porous aluminum oxide film layer is obtained; step 3, a benzenetricarbonyl trichloride solution is added dropwise to the upper surface of the graphene oxide film layer of the first composite film, and drying is carriedout to obtain the two-dimensional / one-dimensional heterogeneous nanochannel film. The invention provides the two-dimensional / one-dimensional heterogeneous nanochannel film prepared by using the methodand application of the two-dimensional / one-dimensional heterogeneous nanochannel film in salt difference energy conversion.

Description

technical field [0001] The invention belongs to the field of energy technology, and in particular relates to a two-dimensional / one-dimensional heterogeneous nanochannel membrane, its preparation method and application. Background technique [0002] With the continuous development of society and the depletion of petrochemical energy, the world today is facing an energy crisis that needs to be solved urgently. Facing the current energy situation, human beings must take new measures to explore new clean energy that can replace fossil energy. Salt difference energy, which exists at river estuaries, is a potential blue energy source. A more traditional method is to use anion-cation exchange membranes to capture the salt difference energy existing between seawater and freshwater, that is, reverse electrodialysis technology, but it has relatively large steric hindrance in ion transmission and low power density. In the process of ion transport, there will be problems such as conce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00
CPCB01D67/0079B01D69/12
Inventor 孔彪张丽萍曾洁周珊
Owner FUDAN UNIV
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