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Preparation method of graphite oxide/multiwalled carbon nanotube/polyvinyl alcohol composite aerogel absorbing material

A multi-walled carbon nanotube, ternary composite technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problem of low recycling rate, low adsorption rate, and high processing cost problem, to achieve the effect of high adsorption rate, easy operation and good adsorption performance

Inactive Publication Date: 2019-03-08
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional adsorbent materials usually have disadvantages such as low adsorption rate, high disposal cost, and low recycling rate, so the development of environmentally friendly high-performance dye adsorbents has gradually become a research hotspot in the field of materials science.

Method used

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  • Preparation method of graphite oxide/multiwalled carbon nanotube/polyvinyl alcohol composite aerogel absorbing material
  • Preparation method of graphite oxide/multiwalled carbon nanotube/polyvinyl alcohol composite aerogel absorbing material
  • Preparation method of graphite oxide/multiwalled carbon nanotube/polyvinyl alcohol composite aerogel absorbing material

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Experimental program
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Effect test

Embodiment 1

[0028] 1. Take three 50mL beakers, add 10mL deionized water, and then add 60mg graphite oxide respectively, sonicate for 30min, stir vigorously for 1.5h to obtain a graphene oxide (GO) aqueous dispersion with a concentration of 6mg / mL.

[0029] 2. Accurately weigh 1 g of polyvinyl alcohol (PVA) and add it to 99 mL of deionized water, stir vigorously at 95° C. for 5 h to dissolve completely, and cool to room temperature to obtain a PVA aqueous solution with a concentration of 1 wt%.

[0030] 3. Measure 10 mL of the PVA aqueous solution with a concentration of 1 wt% obtained in step (2), add it to the GO aqueous dispersion obtained in step (1), and stir at room temperature for 24 hours until uniformly mixed.

[0031] 4. Transfer the reaction solution to a long glass tube with an inner diameter of 2 cm and a volume of 30 mL, seal it with plastic wrap, freeze it in a refrigerator at -18°C for 20 hours, and then thaw it at room temperature for 4 hours. Repeat this cycle for 3 times ...

Embodiment 2

[0035] 1. Take three 50mL beakers, add 10mL deionized water respectively, then add 60mg graphite oxide respectively, ultrasonicate for 30min, stir vigorously for 1.5h to obtain a graphene oxide (GO) aqueous dispersion with a concentration of 6mg / mL, and then add 5mg of graphite oxide Multi-walled carbon nanotubes (MWCNTs) were uniformly dispersed in the GO dispersion by ultrasonication for 30 min to obtain a GO / MWCNTs aqueous dispersion.

[0036] 2. Accurately weigh 1 g of polyvinyl alcohol (PVA) and add it to 99 mL of deionized water, stir vigorously at 95° C. for 5 h to dissolve completely, and cool to room temperature to obtain a PVA aqueous solution with a concentration of 1 wt%.

[0037] 3. Measure 10 mL of the PVA aqueous solution with a concentration of 1 wt% obtained in step (2), add it to the GO / MWCNTs aqueous dispersion obtained in step (1), and stir at room temperature for 24 hours until uniformly mixed.

[0038] 4. Transfer the reaction solution to a long glass tub...

Embodiment 3

[0042] 1. Take three 50mL beakers, add 10mL deionized water respectively, then add 60mg graphite oxide respectively, ultrasonicate for 30min, stir vigorously for 1.5h to obtain a graphene oxide (GO) aqueous dispersion with a concentration of 6mg / mL, and then add 10mg of graphite oxide Multi-walled carbon nanotubes (MWCNTs) were uniformly dispersed in the GO dispersion by ultrasonication for 30 min to obtain a GO / MWCNTs aqueous dispersion.

[0043] 2. Accurately weigh 1 g of polyvinyl alcohol (PVA) and add it to 99 mL of deionized water, stir vigorously at 95° C. for 5 h to dissolve completely, and cool to room temperature to obtain a PVA aqueous solution with a concentration of 1 wt%.

[0044] 3. Measure 10 mL of the PVA aqueous solution with a concentration of 1 wt% obtained in step (2), add it to the GO / MWCNTs aqueous dispersion obtained in step (1), and stir at room temperature for 24 hours until uniformly mixed.

[0045] 4. Transfer the reaction solution to a long glass tu...

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Abstract

The invention discloses a graphite oxide / multiwalled carbon nanotube / polyvinyl alcohol (GO / MWCNTs / PVA) composite aerogel absorbing material and a preparation method of the aerogel absorbing material.GO / MWCNTs / PVA composite aerogel is prepared by a cyclic freezing-unfreezing method. The preparation method is green, environment-friendly, simple in preparation technology and low in cost, and no hazardous byproduct is generated. The prepared ternary composite aerogel has good absorbing capacity for a methylene blue dye in an aqueous solution; quick absorbing balance can be achieved by adjusting acontent of MWCNTs in the composite aerogel and a pH (potential of hydrogen) of the solution; and the composite aerogel has an important application value in the field of industrial dye waste water treatment.

Description

technical field [0001] The invention belongs to the technical field of adsorption functional materials, and in particular relates to a preparation method of a graphene oxide / multi-wall carbon nanotube / polyvinyl alcohol ternary composite airgel adsorption material. Background technique [0002] With the rapid development of printing and dyeing industry, the problem of environmental pollution caused by dye wastewater is becoming more and more serious. However, traditional adsorbent materials usually have disadvantages such as low adsorption rate, high disposal cost, and low recycling rate. Therefore, the development of environmentally friendly high-performance dye adsorbents has gradually become a research hotspot in the field of materials science. [0003] Airgel is a three-dimensional cross-linked network structure material with extremely low density, developed porosity and huge specific surface area, so it is a potential adsorption material. Graphene oxide (GO) is a single...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/38C02F101/36
CPCB01J20/205B01J20/261B01J20/28047C02F1/28C02F2101/36C02F2101/38C02F2101/40
Inventor 疏瑞文赵杰成高秀张佳宾谢艳马艳培孙焰丽
Owner ANHUI UNIV OF SCI & TECH
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