Preparation method and application of graphene oxide/MXene composite film

A graphene and composite membrane technology, applied in the field of composite membranes, can solve problems such as small flux, and achieve the effect of promoting promotion

Inactive Publication Date: 2019-08-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention aims at the problem that the existing graphene oxide membrane has a small flux, and proposes a composite of MXene and graphene oxide to prepare graphene oxide (GO) with high flux and high rejection rate. / MXene composite film method, which oxidizes and exfoliates graphite into graphene oxide, Ti 3 AlC 2 Etched and stripped into MXene, these two two-dimensional materials were compositely loaded on the surface of a 0.45 μm microfiltration membrane by vacuum filtration to intercept and adsorb dyes in water

Method used

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  • Preparation method and application of graphene oxide/MXene composite film
  • Preparation method and application of graphene oxide/MXene composite film
  • Preparation method and application of graphene oxide/MXene composite film

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Embodiment 1

[0037] Preparation of Graphene Oxide (GO) / MXene Membranes with a Composite Ratio of 1:1

[0038] Take 1g NaNO 3 Add to the beaker, pour 46mL concentrated H 2 SO 4 , placed in a water bath and stirred, then added 2g flake graphite with a mesh number of 325, cooled to 5°C and stirred for 1h; slowly added 6g KMnO 4 , add in batches for 1 hour; then raise the temperature to 35°C and react for 2 hours, slowly add 92mL deionized water, react at 98°C for 15 minutes, and finally add an appropriate amount of hydrogen peroxide to react for 30 minutes, centrifuge the obtained product, first use 5% HCl Solution cleaning, centrifuging at 4000rpm for 8min three times, pouring off the supernatant, and then washing with deionized water, centrifuging at 8000rpm for 8min three times until the pH is neutral, pouring off the supernatant, and finally centrifuging at 12000rpm for 10min to take The upper layer solution was sonicated for 1 h, freeze-dried to a solid, and 100 mg of graphene oxide s...

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Abstract

The invention provides a preparation method and application of a graphene oxide / MXene composite film. The method comprises the following steps: mixing a graphene oxide solution and an MXene solution in proportion to obtain a mixed solution, carrying out ultrasonic treatment on the mixed solution, pouring the solution into a suction filtration bottle with a microfiltration membrane, and carrying out vacuum filtration treatment for compounding and supporting the two two-dimensional materials on the surface of the microfiltration membrane to obtain the composite membrane. The pure water flux of the graphene oxide (GO) / MXene composite membrane is far greater than that of a pure graphene oxide membrane; with the increase of the MXene doping proportion, the flux is in an increasing trend; the removal rate of the composite membrane to small molecular dyes in water is up to 99.5% or above; the method is simple, easy to operate, easy to use on a large scale and beneficial to popularization.

Description

technical field [0001] The invention belongs to the technical field of composite membranes, and in particular relates to a preparation method and application of a graphene oxide / MXene composite membrane. Background technique [0002] The water quality and quantity of global water resources are deteriorating day by day, and membrane technology has attracted more and more attention. In terms of water treatment, the main membrane technologies used include microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO) and forward osmosis (FO). However, these membranes still face some problems and challenges in the field of water treatment, such as low pollutant rejection rate, poor membrane mechanical properties, high energy consumption, and some membrane materials are not resistant to chlorine, etc. As a new type of two-dimensional material, graphene oxide has super elasticity, chemical stability and mechanical strength due to its special molecular struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00B01J20/20B01J20/30B01J20/28C02F1/28C02F1/44C02F101/30
CPCB01D67/00B01D67/0079B01D69/12B01J20/0248B01J20/20B01J20/28033B01J2220/42C02F1/281C02F1/283C02F1/288C02F1/44C02F2101/308
Inventor 刘婷刘晓燕孙克宁田隆
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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