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Nano particle intercalation graphene oxide thin film and preparation method and application

A graphene film and nanoparticle technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of limiting the improvement of water flux, not suitable for industrial production, long preparation process, etc. Realize the effect of large-scale industrial production and high retention rate

Active Publication Date: 2018-02-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in the above-mentioned method for preparing graphene oxide film, such as long preparation process, low efficiency, high energy consumption, low film thickness, and unsuitable for industrial production.
At the same time, the pure graphene oxide film has a low interlamellar spacing, which severely limits the improvement of water flux.

Method used

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  • Nano particle intercalation graphene oxide thin film and preparation method and application
  • Nano particle intercalation graphene oxide thin film and preparation method and application
  • Nano particle intercalation graphene oxide thin film and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] To prepare graphene oxide film, the specific steps are as follows:

[0043] Step 1: Prepare a graphene oxide solution: Dissolve a certain amount of graphene oxide powder in an aqueous solution, treat it with a cell pulverizer for 2 hours, ultrasonicate for 2 hours, and magnetically stir for 5 hours to obtain a uniformly dispersed graphene oxide solution. The concentration of graphene oxide is 5mg / mL.

[0044] Step 2: The graphene oxide solution was left to defoam, then transferred to a syringe, and the mixed solution was sprayed onto a 0.44 μm nylon microporous filter membrane resistant to organic solutions by electrostatic spraying. The electrostatic spraying voltage is 20KV, the relative humidity is 20%-50%, the temperature is 30°C, the propulsion speed is 0.15mL / min, the receiving distance is 15cm, the spinning needle is No. 9, and the drum is used for receiving, and the drum speed is 100r / min , The electrostatic spraying time is 120min.

[0045] Step 4: Put the ob...

Embodiment 2

[0048] Preparation of titanium dioxide intercalated graphene oxide film, the specific steps are as follows:

[0049] Step 1: Prepare a graphene oxide solution: Dissolve a certain amount of graphene oxide powder in an aqueous solution, treat it with a cell pulverizer for 2 hours, ultrasonicate for 2 hours, and magnetically stir for 5 hours to obtain a uniformly dispersed graphene oxide solution. The concentration of graphene oxide is 5mg / mL.

[0050] Step 2: adding graphene oxide and titanium dioxide (particle size: 30 nm) with a mass ratio of 10:5 to the graphene oxide solution, and ultrasonicating for 4 hours to obtain a uniformly mixed mixed solution.

[0051] Step 3: The mixed solution was left standing for defoaming, then transferred to a syringe, and electrostatically sprayed, and the mixed solution was sprayed onto a 0.44 μm nylon microporous filter membrane resistant to organic solutions. The electrostatic spraying voltage is 20KV, the relative humidity is 20%-50%, the...

Embodiment 3

[0055] Preparation of hydrophilic fumed silica intercalated graphene oxide film, the specific steps are as follows:

[0056] Step 1: Prepare a graphene oxide solution: Dissolve a certain amount of graphene oxide powder in an aqueous solution, treat it with a cell pulverizer for 2 hours, ultrasonicate for 2 hours, and magnetically stir for 5 hours to obtain a uniformly dispersed graphene oxide solution. The concentration of graphene oxide is 5mg / mL.

[0057] Step 2: Add the graphene oxide solution to the above-mentioned graphene oxide solution with a mass ratio of graphene oxide and nanoparticles of 10:5 of hydrophilic fumed silica (particle size: 20 nm), and ultrasonicate for 4 hours to obtain a uniformly mixed mixed solution.

[0058] Step 3: The mixed solution was left standing for defoaming, then transferred to a syringe, and electrostatically sprayed, and the mixed solution was sprayed onto a 0.22 μm polyvinylidene fluoride microporous filter membrane resistant to organic ...

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Abstract

Th invention discloses a nano particle intercalation graphene oxide thin film and a preparation method and application. The thin film is formed by spraying graphene oxide onto a millipore filter in anelectrostatic spraying mode to be stacked, nano particles are inserted between graphene oxide sheets, the particle size of the nano particles ranges from 10 nm to 40 nm, and the nano particles are hydrophilic nano particles. The preparation method comprises the steps that graphene oxide and the namo particles are added into a solvent to be dispersed uniformly, a mixed solution is obtained, and the nano particle intercalation graphene oxide thin film can be obtained by spraying the mixed solution to the millipore filter in the electrostatic spraying mode. The nano particle intercalation graphene oxide thin film can effectively increase the space between the graphene oxide sheets, the pure water flux is increased, and meanwhile the high retention rate is kept for organic dyestuff.

Description

technical field [0001] The invention relates to the technical field of film preparation, in particular to a nanoparticle-intercalated graphene oxide film, a preparation method and application thereof. Background technique [0002] Organic dyes are widely used in the printing and dyeing industry, papermaking and other chemical industries, and the discharge of untreated organic dyes into rivers and lakes will cause serious water pollution. These organic dyes have strong chemical stability and toxicity, which will cause serious ecological imbalance and pose a serious threat to the health of humans and animals. Therefore, these organic dyes need to be effectively removed before discharge. Combining the commonly used treatment methods now, membrane separation technology has become the most commonly used method because of its high separation efficiency, low cost, and environmental friendliness. Therefore, the preparation of a high water flux, high retention rate, chemical and mec...

Claims

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Application Information

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IPC IPC(8): C02F1/44C01B32/198
CPCC02F1/444Y02A20/131
Inventor 慈立杰陈龙
Owner SHANDONG UNIV
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