High-throughput forward-osmosis membrane containing a-C3N4/Ag3PO4 composite material and preparation method thereof

A composite material and forward osmosis membrane technology, applied in the field of forward osmosis membranes, can solve problems such as membrane fouling and restricting the development of forward osmosis membranes

Active Publication Date: 2020-03-31
青岛海若智能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual operation process, the "upper limit balance" between water flux and salt interception and membrane fouling restrict the development of forward osmosis membranes.

Method used

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  • High-throughput forward-osmosis membrane containing a-C3N4/Ag3PO4 composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A high-throughput a-C containing 3 N 4 / Ag 3 PO 4 The preparation method of forward osmosis membrane comprises steps as follows:

[0057] (1) Preparation of CNT dispersion: 10 mg of carbon nanotubes and 100 mg of sodium dodecylbenzenesulfonate were added to 100 ml of deionized water, and ultrasonically treated with a 300W power ultrasonic cleaner for 30 min to disperse the solute evenly in the solution. Then sonicate for 10 h with an ultrasonic cell pulverizer. Centrifuge the mixed solution for 30 minutes, take the supernatant and dilute 1 time with pure water to obtain a diluted solution; then add dopamine to the diluted solution under heating and stirring, add 10 mg of dopamine to every 150 mL of the diluted solution, keep stirring at 40°C for 1 hour, and add to the diluted solution. Add Tris-HCl buffer solution (pH=8.5) to the system, keep stirring at 40°C for 24 hours, add 10 mL of Tris-HCl buffer solution to every 150 mL of diluent, centrifuge the reacted dispe...

Embodiment 2

[0066] The high throughput containing a-C described in embodiment 1 3 N 4 / Ag 3 PO 4 The preparation method of the forward osmosis membrane, the difference is that,

[0067] In step (3), a-C in the aqueous phase solution 3 N 4 / Ag 3 PO 4 The concentration of composite material is 0.3g / L.

Embodiment 3

[0069] The high throughput containing a-C described in embodiment 1 3 N 4 / Ag 3 PO 4 The preparation method of the forward osmosis membrane, the difference is that,

[0070] In step (3), a-C in the aqueous phase solution 3 N 4 / Ag 3 PO 4 The concentration of composite material is 0.4g / L.

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Abstract

The invention relates to a high-throughput forward-osmosis membrane containing a-C3N4 / Ag3PO4 composite material and a preparation method thereof. In the invention, a base film containing carbon nanotube (CNT) is used as a substrate, so that through the interfacial polymerization of polyamine and poly(acyl chloride), the a-C3N4 / Ag3PO4 composite material is successfully implanted into a polyamide layer generated by a reaction of m-phenylenediamine and trimesoyl chloride, thereby preparing the novel TFC film. Compared with a conventional TFC film, because the CNT can reduce the transfer path of water molecules and water transfer resistance is reduced, the transport of the water molecules is accelerated. In addition, the a-C3N4 in the a-C3N4 / Ag3PO4 composite material can supply extra nano-channels, so that water permeation rate of the forward-osmosis membrane is increased, and the separation performance of the forward-osmosis membrane is significantly enhanced. The composite is rich in negative charges, so that electronegativity of the surface of the membrane is improved; therefore, the surface of the membrane is not liable to attract pollutants and the antifouling performance is significantly improved.

Description

technical field [0001] The invention relates to a high-throughput a-C-containing 3 N 4 / Ag 3 PO 4 A forward osmosis membrane of a composite material and a preparation method thereof belong to the technical field of forward osmosis membranes. Background technique [0002] With the development of society and the continuous growth of population, fresh water resources are decreasing day by day, and the problem of water pollution is becoming more and more serious. To solve this problem, obtaining high-quality fresh water through seawater desalination is an effective method. [0003] Thin-film composite forward osmosis membranes (TFCFO) prepared by interfacial polymerization have been widely used due to their low energy consumption, high flux, and simple operation. However, in the actual operation process, the "upper limit balance" between water flux and salt interception and membrane fouling restrict the development of forward osmosis membranes. Compared with the traditional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D69/12
CPCB01D67/0079B01D69/02B01D69/12B01D2325/48
Inventor 王志宁王栋
Owner 青岛海若智能技术有限公司
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