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Graphite-phase C3N4 nanosheet two-dimensional film for oil-water separation and preparation method thereof

A C3N4, oil-water separation technology, applied in the field of membrane separation, can solve problems such as water pollution, achieve the effect of large separation flux, not easy to collapse, good thermal stability and chemical stability

Inactive Publication Date: 2021-08-24
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Intercalation of protonated graphitic phase C with sulfate ions via a facile synthetic technique 3 N 4 (GCN) nanosheets to regulate interlayer channels, load the GCN two-dimensional nanosheets on the basement membrane, prepare a membrane material that can efficiently separate oil and water, obtain high-purity separated water, and solve the water pollution faced in real life question

Method used

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  • Graphite-phase C3N4 nanosheet two-dimensional film for oil-water separation and preparation method thereof
  • Graphite-phase C3N4 nanosheet two-dimensional film for oil-water separation and preparation method thereof
  • Graphite-phase C3N4 nanosheet two-dimensional film for oil-water separation and preparation method thereof

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Embodiment 1

[0041] (1) Preparation of pristine GCN powder. Take 5g of melamine powder and put it on a loose cover (the matching ceramic crucible cover is directly covered on the crucible without airtightness, which will not affect the gas exchange inside and outside the crucible during the heating process, and only prevents impurities from falling into the crucible sample.) In a crucible, heated to 600°C at a rate of 1°C / min in an air atmosphere muffle furnace for thermal condensation, kept at a temperature of 2 hours, and then cooled to room temperature at a rate of 3°C / min to obtain light yellow GCN powder, Grind the powder thoroughly for later use.

[0042] (2) Preparation of GCN-sulfuric acid (SA) composites. Weigh 700mg of GCN powder, add 10mL of concentrated sulfuric acid (98wt%) to GCN, stir and heat in an oil bath at 100°C for 12h, and let it stand until it is naturally cooled to room temperature to form a transparent and uniform bright yellow GCN-SA solution . Accurately pipet...

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Abstract

The invention discloses a graphite-phase C3N4 nanosheet two-dimensional film for oil-water separation and a preparation method thereof. The method comprises the steps: (1) preparing graphite phase C3N4 powder; (2) preparing a graphite phase C3N4-sulfuric acid composite material suspension; and (3) preparing graphite phase C3N4 and graphite phase C3N4-sulfuric acid composite material films. The graphite-phase C3N4 nanosheet is better in dispersity, a colloidal aqueous solution of the graphite-phase C3N4 nanosheet can be kept stable for at least 6 months without agglomeration, the uniformity of the membrane prepared by a vacuum filtration method can be controlled, and the two-dimensional membrane has better thermal stability and chemical stability in a water-phase system; and the interlayer spacing regulated by embedded sulfate anions is stable and not easy to collapse, so that the smoothness of a molecular channel and a relatively large separation flux are ensured.

Description

technical field [0001] The invention discloses graphite phase C for oil-water separation 3 N 4 The invention relates to a two-dimensional nanosheet membrane and a preparation method thereof, which belong to the technical field of membrane separation. Background technique [0002] With the rapid development of global industrial activities, the amount of sewage produced by humans is increasing. These industrial or domestic wastewater usually contain a large amount of pollutants such as oil, organic dyes, surfactants, proteins, etc., which need to be separated and purified before they can be safely treated. release into the environment. Among them, oil-water separation, especially the separation of oil-water mixed emulsion has always been a hot issue in wastewater treatment. The current oil-water separation technologies mainly include gravity sedimentation method, adsorption method, air flotation method, coagulation method, centrifugation method, electrochemical and photocat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/12B01D71/02B01D71/36C02F1/44
CPCB01D67/0039B01D67/0069B01D69/12B01D71/02B01D71/36C02F1/44
Inventor 刘波储润润
Owner UNIV OF SCI & TECH OF CHINA
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