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Preparation method of MXene/reduced porous graphene oxide (r-HGO) composite membrane with high flux and high removal rate

A removal rate, high-throughput technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor membrane stability, difficult to balance membrane flux and retention effect, and achieve the effect of promoting promotion.

Active Publication Date: 2021-11-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above technical solution may have the technical problem of poor membrane stability, or the technical problem that the flux and interception effect of the membrane are difficult to balance

Method used

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  • Preparation method of MXene/reduced porous graphene oxide (r-HGO) composite membrane with high flux and high removal rate
  • Preparation method of MXene/reduced porous graphene oxide (r-HGO) composite membrane with high flux and high removal rate
  • Preparation method of MXene/reduced porous graphene oxide (r-HGO) composite membrane with high flux and high removal rate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Step 1: Take 0.5g NaNO 3 +23ml concentrated H 2 SO 4 Mix and add to a 500ml beaker, cool to 5°C, add 1g graphite, stir for 1 hour; slowly add 3g KMnO 4 reaction, followed by magnetic stirring for 10 min. Then the temperature was raised to 35° C. and the reaction was stirred for 2 h. Slowly add 56ml of deionized water, control the temperature at 98°C and react for about 30min. After stirring for another 15 min, 150 mL of deionized water was added. Then add 30% H 2 o 2 until golden brown particles appear. Stir at room temperature for 6 hours, centrifuge the obtained product, and wash it with 1 L of 5% HCl solution, take the required amount, then wash it with deionized water until neutral, after ultrasonic treatment for 1 hour, take an appropriate amount of solution and freeze-dry to obtain graphene oxide powder , take an appropriate amount of powder and configure it into a 2g / L solution.

[0046] Step 2: Take 50ml of 2g / L graphene oxide solution 50ml, add 5mL of ...

Embodiment 2

[0061] Step 1: Take 0.5g NaNO 3 +23ml concentrated H 2 SO 4 Mix and add to a 500ml beaker, cool to 5°C, add 1g graphite, stir for 1 hour; slowly add 3g KMnO 4 reaction, and then magnetically stirred for 10 min. Then the temperature was raised to 35° C. and the reaction was stirred for 2 h. Slowly add 56ml of deionized water, control the temperature at 98°C and react for about 30min. After stirring for another 15 min, 150 mL of deionized water was added. Then add 30% H 2 o 2 until golden brown particles appear. Stir at room temperature for 6 hours, centrifuge the obtained product, and wash it with 1 L of 5% HCl solution, take the required amount, then wash it with deionized water until neutral, after ultrasonic treatment for 1 hour, take an appropriate amount of solution and freeze-dry to obtain graphene oxide powder , take an appropriate amount of powder and configure it into a 2g / L solution.

[0062] Step 2: Take 50ml of 2g / L graphene oxide solution 50ml, add 5mL of ...

Embodiment 3

[0067] Step 1: Take 0.5g NaNO 3 +23ml concentrated H 2 SO 4 Mix and add to a 500ml beaker, cool to 5°C, add 1g graphite, stir for 1 hour; slowly add 3g KMnO 4 reaction, followed by magnetic stirring for 10 min. Then the temperature was raised to 35° C. and the reaction was stirred for 2 h. Slowly add 56ml of deionized water, control the temperature at 98°C and react for about 30min. After stirring for another 15 min, 150 mL of deionized water was added. Then add 30% H 2 o 2 until golden brown particles appear. Stir at room temperature for 6 hours, centrifuge the obtained product, and wash it with 1 L of 5% HCl solution, take the required amount, then wash it with deionized water until neutral, after ultrasonic treatment for 1 hour, take an appropriate amount of solution and freeze-dry to obtain graphene oxide powder , take an appropriate amount of powder and configure it into a 2g / L solution.

[0068] Step 2: Take 50ml of 2g / L graphene oxide solution 50ml, add 5mL of ...

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Abstract

The invention discloses a preparation method of an MXene / reduced porous graphene oxide (r-HGO) composite membrane with high flux and high removal rate, and belongs to the field of environment-friendly water treatment. According to the invention, graphene oxide (GO) is etched and reduced into reduced porous graphene oxide (r-HGO), Ti3AlC2 is etched and stripped into MXene, and the two two-dimensional materials are compounded and loaded on the surface of a microfiltration membrane of 0.22 [mu] m through a vacuum assisted filtration (VAF) method. The prepared MXene / r-HGO composite membrane intercepts and adsorbs dye pollutants in water through the size selection effect and the electrostatic interaction, by adjusting the doping proportion of the two materials, a high dye interception effect is achieved under high flux, and the dye interception effect is obviously improved along with increase of the doping proportion of r-HGO. The method is simple and easy to operate, easy to use in a large scale and beneficial to popularization.

Description

technical field [0001] The invention relates to the field of environmental protection water treatment, in particular to a method for preparing a high flux and high removal rate MXene / reduced porous graphene oxide (r-HGO) 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. Graphene oxide, as a new type of two-dimensional material, has high mechanical strength, chemical stability and abundant...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D67/00B01D71/02B01D71/68B01D69/02C02F1/44C02F101/30
CPCB01D69/12B01D67/0079B01D71/021B01D71/022B01D71/68B01D69/02C02F1/44C02F2101/308
Inventor 刘婷郭士轩孙克宁刘勋
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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