Aminated graphene oxide and graphite phase carbon nitride composite modified film material and preparation method and application thereof

A graphite phase carbon nitride and composite modification technology, applied in the field of environment and water treatment, can solve the problems of narrow spectral response range, weak anti-pollution performance, low photocatalytic efficiency, etc., and achieve improved anti-pollution performance and anti-pollution performance. Improved, stable performance

Pending Publication Date: 2019-10-01
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to overcome the defects and deficiencies of the existing film surface photocatalytic modification technology, such as low photocatalytic efficiency, narrow sp

Method used

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  • Aminated graphene oxide and graphite phase carbon nitride composite modified film material and preparation method and application thereof
  • Aminated graphene oxide and graphite phase carbon nitride composite modified film material and preparation method and application thereof
  • Aminated graphene oxide and graphite phase carbon nitride composite modified film material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0088] The influence of embodiment 1 SDBS concentration

[0089] Use anionic surfactant sodium dodecylbenzene sulfonate (SDBS) to carry out pretreatment to polysulfone original membrane original membrane (polysulfone original membrane is also called original membrane, polysulfone hollow fiber organic ultrafiltration membrane, the same below), so that Activated polysulfone original membrane and hydrophilic material SLg-C 3 N 4 / NGO heterojunction is firmly combined to improve membrane flux.

[0090] Prepare SDBS solutions of 1g / L, 3g / L, 5g / L, 7g / L, and 9g / L respectively, and place the original polysulfone membranes in different concentrations of SDBS solutions for 10 minutes, then take them out, and measure their pressure at 0.20MPa. The initial pure water flux under conditions.

[0091] Such as figure 1 As shown, with the increase of SDBS concentration, the pure water flux of the membrane also increased continuously. When the SDBS concentration is 5g / L, the pure water flu...

Embodiment 2

[0092] Example 2 SL g-C 3 N 4 Influence of mass fraction of NGO in NGO heterojunction

[0093] Take 100mg SL g-C 3 N 4 Add a certain amount of NGO to the ratio solution of water and ethanol (water:ethanol ratio is 1:1), sonicate for 4 hours, and finally centrifuge the solid product, wash it repeatedly with water and ethanol respectively, and dry the product at 80°C to obtain SL g-C 3 N 4 / NGO heterojunction. By controlling the amount of NGO added (1wt%, 2wt%, 3wt%, 4wt%, 5wt%), SL g-C with different NGO loadings were prepared respectively 3 N 4 / NGO heterojunction, denoted as SL g-C 3 N 4 / NGO-1, SL g-C 3 N 4 / NGO-2, SL g-C 3 N 4 / NGO-3, SL g-C 3 N 4 / NGO-4, SL g-C 3 N 4 / NGO-5.

[0094] The effect of the mass fraction of NGO in the heterojunction on the visible light degradation of RhB is as follows: figure 2 shown. Under blank conditions, stirring for 20min under dark conditions and 120min of visible light irradiation, RhB did not degrade (see figure 2...

Embodiment 3

[0095] Embodiment 3 Orthogonal Test

[0096] In this example, the SL g-C is preliminarily determined through a multi-index orthogonal test 3 N 4 / NGO composite modified membrane (also known as SL g-C 3 N 4 / NGO composite modified polyamide membrane, composite modified membrane, composite membrane, modified membrane, the same below). SL g-C obtained from orthogonal experiments 3 N 4 The optimal preparation conditions of the / NGO composite modified polyamide membrane are shown in Table 1. This embodiment selects 5 influencing factors: SL g-C 3 N 4 Dosing amount, MPD concentration, MPD immersion time, TMC concentration, TMC immersion time (abbreviated as D 改性剂 、C MPD , t MPD 、C TMC , t TMC ), set 4 levels for each factor, and use the performance parameter index of the composite modified polyamide membrane to determine the primary and secondary order of each influencing factor in the modified membrane through the R value of the range, and determine the SL g-C 3 N 4 O...

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Abstract

The invention relates to an aminated graphene oxide and graphite phase carbon nitride composite modified film material and a preparation method and application thereof. The composite modified film material comprises a polysulfone original film, SL g-C3N4/NGO heterojunctions uniformly distributed on the polysulfone original film in the form of a layer-by-layer laminated structure and a polyamide skin layer compounded on the surface of the polysulfone original film. The composite modified film material adopts NGO and SL g-C3N4 as modifiers. Both of the NGO and the SL g-C3N4 are combined to modify the surface of the polysulfone original film and form the layer-by-layer laminated structure. Then the polyamide skin layer is compounded on the polysulfone original film to form a compact SL g-C3N4/NGO/ polyamide composite structure layer on the surface of the polysulfone original film. The compact SL g-C3N4/NGO/ polyamide composite structure layer improves the hydrophilicity of the surface ofthe film, reduces the forbidden band value of a functional layer of the film, and has excellent visible light catalytic capability and organic matter catalytic degradation capability; the film flux isgreatly improved, the anti-pollution capability is obviously improved, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of environment and water treatment, and in particular relates to a composite modified membrane material of aminated graphene oxide and graphite-phase carbon nitride, and a preparation method and application thereof. Background technique [0002] Membrane separation technology is a new type of efficient water treatment technology. Using a membrane with selective permeability as a separation medium, under the action of an external force of pressure difference or concentration difference, the selective permeability of the membrane to different substances is used to allow the smaller small molecule dissolved substances and solvents in the original solution to pass through the membrane pores , while the dissolved macromolecules are retained, so as to achieve the purpose of separation and purification of the original solution. Membrane separation technology can achieve selective separation of target pollutants, a...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D69/12B01D69/02B01D67/00B01D65/02C02F1/44C02F1/30C02F101/30C02F101/34C02F101/38
CPCB01D71/68B01D69/12B01D69/02B01D67/0079B01D67/0088B01D65/02C02F1/30C02F1/44B01D2321/34B01D2325/10B01D2325/30B01D2325/36C02F2101/30C02F2101/34C02F2101/38C02F2101/40C02F2305/10
Inventor 李冬梅梁奕聪张权谢昱林泓宇冯力刘贝
Owner GUANGDONG UNIV OF TECH
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