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Novel environment-friendly graphene oxide film and preparation method thereof

A graphene membrane and graphene technology, applied in the field of graphene, can solve the problems of strict water temperature requirements, low separation efficiency, small adaptation range, etc., and achieve the effects of good permeability, huge application prospects, and simple and easy process.

Inactive Publication Date: 2019-08-23
TIANJIN WATER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a new type of environmentally friendly graphene oxide membrane and its preparation method to solve the problems of low separation efficiency, high energy consumption, strict requirements on water temperature, and small scope of application in traditional water treatment technologies.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Graphene oxide was added into water to form a graphene oxide dispersion with a concentration of 0.05 mg / mL. Ultrasonic treatment for 3 min at a power of 20 W to obtain a graphene oxide dispersion. The graphene oxide dispersion was centrifuged at 3000r / min for 10 minutes to separate the unpeeled thicker graphite flakes to obtain a thin-layer graphene flake dispersion. The above-mentioned thin-layer graphene sheet dispersion liquid is centrifuged under the condition of 12000r / min for 20min, and the small-sized thin-layer graphene nano-sheets are retained in the supernatant to obtain large-sized thin-layer graphene nano-sheets; 200mL concentration is 10mg / min The large-size thin-layer graphene nanosheet dispersion of L was ultrasonically treated at a power of 400W for 10 minutes to obtain a large-size thin-layer graphene nanosheet dispersion. Pour the large-size thin-layer graphene nanosheet dispersion into a suction filter bottle with a polytetrafluoroethylene microfiltr...

Embodiment 2

[0037] Graphene oxide was added into water to form a graphene oxide dispersion with a concentration of 0.05 mg / mL. Ultrasonic treatment for 3 min at a power of 20 W to obtain a graphene oxide dispersion. The graphene oxide dispersion was centrifuged at 3000r / min for 10 minutes to separate the unpeeled thicker graphite flakes to obtain a thin-layer graphene flake dispersion. The above-mentioned thin-layer graphene sheet dispersion liquid is centrifuged under the condition of 12000r / min for 20min, and the small-sized thin-layer graphene nano-sheets are retained in the supernatant to obtain large-sized thin-layer graphene nano-sheets; 500mL concentration is 10mg / min The large-size thin-layer graphene nanosheet dispersion of L was ultrasonically treated at a power of 400W for 10 minutes to obtain a large-size thin-layer graphene nanosheet dispersion. Pour the large-size thin-layer graphene nanosheet dispersion into a suction filter bottle with a polytetrafluoroethylene microfiltr...

Embodiment 3

[0044] Graphene oxide was added into water to form a graphene oxide dispersion with a concentration of 0.05 mg / mL. Ultrasonic treatment for 3 min at a power of 20 W to obtain a graphene oxide dispersion. The graphene oxide dispersion was centrifuged at 3000r / min for 10 minutes to separate the unpeeled thicker graphite flakes to obtain a thin-layer graphene flake dispersion. The above-mentioned thin-layer graphene sheet dispersion is centrifuged at 12000r / min for 20min, and the small-sized thin-layer graphene nano-sheets are retained in the supernatant to obtain large-sized thin-layer graphene nano-sheets; The large-size thin-layer graphene nanosheet dispersion of L was ultrasonically treated at a power of 400W for 10 minutes to obtain a large-size thin-layer graphene nanosheet dispersion. Pour the large-size thin-layer graphene nanosheet dispersion into a suction filter bottle with a polytetrafluoroethylene microfiltration membrane as a support membrane, then vacuum filter, t...

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Abstract

The invention provides a novel environment-friendly graphene oxide film and a preparation method thereof, the preparation method comprises the following steps of: S1, mixing graphene oxide and a solvent according to a certain proportion, and performing ultrasonic treatment to obtain a graphene oxide dispersion liquid; S2, separating large-thickness graphite sheets which are not peeled off to obtain a supernatant liquid which is a thin-layer graphene sheet dispersion liquid; S3, centrifuging the thin-layer graphene sheet dispersion liquid to obtain a large-size thin-layer graphene nano sheet; S4, carrying out ultrasonic treatment to obtain a large-size thin-layer graphene nano-sheet dispersion liquid; S5, compounding the large-size thin-layer graphene nano-sheet dispersion liquid onto the surface of a high molecular polymer filter film or an inorganic filter film to form a film material with a graphene oxide separation layer. The preparation method of the novel environment-friendly graphene oxide film adopt the large-size thin-layer graphene nano sheets to prepare the graphene oxide film material, the process is simple and easy to implement and is environment-friendly, and the thickness of the film material can be directly adjusted and controlled by adjusting the usage amount of raw materials.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a novel environmentally friendly graphene oxide film and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, a large amount of wastewater containing various refractory organic pollutants and metal ions is produced. Refractory organic pollutants such as phenols, nitrobenzenes, anilines, chlorinated benzenes, polychlorinated biphenyls, polycyclic aromatic hydrocarbons, etc. are usually highly toxic substances with certain carcinogenic, teratogenic, and mutagenesis. Organic wastewater containing these refractory organic pollutants usually has the following characteristics: high organic matter content, large chroma, strong toxicity, high salinity, large pH changes, complex components, serious imbalance of microbial nutrient elements, and poor biodegradability. Wastewater containing heavy metals is also harmful to w...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/02B01D67/00
CPCB01D67/0039B01D67/0079B01D69/02B01D71/024
Inventor 王浩甄梅楠洪大为任雪萍吴亚兵陈树平
Owner TIANJIN WATER ENG CO LTD
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