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Preparation method of hydrophobic low-density shaddock peel carbon aerogel and application thereof

A technology of carbon aerogel and pomelo peel, which is applied in the field of material preparation and pollutant treatment, can solve the problems of expensive raw materials, incapable of large-scale industrial production, complicated and cumbersome preparation process, etc., and achieve environmental pollution relief, excellent hydrophobicity, The effect of high adsorption capacity

Inactive Publication Date: 2017-09-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these carbon aerogels have the disadvantages of expensive raw materials, c

Method used

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  • Preparation method of hydrophobic low-density shaddock peel carbon aerogel and application thereof
  • Preparation method of hydrophobic low-density shaddock peel carbon aerogel and application thereof
  • Preparation method of hydrophobic low-density shaddock peel carbon aerogel and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Preparation of Hydrophobic Low-Density Grapefruit Peel Carbon Airgel

[0031] (1) Take the pomelo peel from which the outer skin and pulp have been removed, cut it into blocks of appropriate size, put it into an autoclave, and react at 180° C. for 24 hours to obtain the pomelo peel hydrogel.

[0032] (2) Transfer the grapefruit peel hydrogel into a large beaker filled with deionized water, and magnetically stir it in a constant temperature water bath at 40°C for 12 hours at a stirring speed of 200rpm, repeating 3 times.

[0033] (3) Freeze-drying the removed grapefruit peel hydrogel to obtain grapefruit peel aerogel. The obtained pomelo peel airgel was placed in a tube furnace at 900 °C and calcined under nitrogen for 60 min at a nitrogen flow rate of 50 mL min -1 , the heating rate is 3°C min -1 , after cooling to room temperature, a hydrophobic and low-density grapefruit peel carbon aerogel was obtained.

[0034] 2. Quantitative adsorption experiment

[0035] T...

Embodiment 2

[0037] 1. Preparation of Hydrophobic Low-Density Grapefruit Peel Carbon Airgel

[0038] (1) Take the pomelo peel from which the outer skin and pulp have been removed, cut it into blocks of suitable size, put it into an autoclave, and react at 200° C. for 12 hours to obtain the pomelo peel hydrogel.

[0039] (2) Transfer the grapefruit peel hydrogel into a large beaker filled with deionized water, and magnetically stir it in a constant temperature water bath at 60°C for 8 hours at a stirring speed of 100 rpm, and repeat 6 times.

[0040] (3) Freeze-drying the removed grapefruit peel hydrogel to obtain grapefruit peel aerogel. The obtained pomelo peel airgel was placed in a tube furnace at 800 °C and calcined under nitrogen for 120 min at a nitrogen flow rate of 50 mL min -1 , the heating rate is 3°C min -1 , after cooling to room temperature, a hydrophobic and low-density grapefruit peel carbon aerogel was obtained.

[0041] 2. Quantitative adsorption experiment

[0042] Ta...

Embodiment 3

[0044] 1. Preparation of Hydrophobic Low-Density Grapefruit Peel Carbon Airgel

[0045] (1) Take the pomelo peel from which the outer skin and pulp have been removed, cut it into blocks of suitable size, move it into an autoclave, and react at 150° C. for 24 hours to obtain the pomelo peel hydrogel.

[0046] (2) Transfer the grapefruit peel hydrogel into a large beaker filled with deionized water, and magnetically stir it in a constant temperature water bath at 20°C for 6 hours at a stirring speed of 1000rpm, repeating 12 times.

[0047] (3) Freeze-drying the removed grapefruit peel hydrogel to obtain grapefruit peel aerogel. The obtained pomelo peel aerogel was placed in a tube furnace at 950 °C and calcined under nitrogen for 30 min at a nitrogen flow rate of 50 mL min -1 , the heating rate is 3°C min -1 , after cooling to room temperature, a hydrophobic and low-density grapefruit peel carbon aerogel was obtained.

[0048] 2. Quantitative adsorption experiment

[0049] T...

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Abstract

The invention belongs to the field of material preparation and pollutant treatment, and discloses a preparation method and application of a hydrophobic low-density pomelo peel carbon airgel. The invention uses fresh pomelo peels as raw materials, and is prepared by means of hydrothermal carbonization, freeze-drying and high-temperature pyrolysis. First, remove the outer skin and pulp of grapefruit to obtain fluffy grapefruit peel raw materials, which are hydrothermally carbonized in a high-temperature reactor; then, use a constant temperature water bath to wash away impurities, and then freeze-dry; then pyrolyze under nitrogen protection at high temperature, The oxygen-containing functional groups on the surface are removed to obtain a hydrophobic, lightweight and porous biomass carbon aerogel. The carbon airgel exhibited high adsorption capacity for oil and organic solvents. The pomelo peel used in the present invention is a cheap and renewable biomass material, which not only reduces the preparation cost of carbon aerogels, but also alleviates the environmental pollution problems that waste biomass may cause, and its products can also effectively It can effectively remove oil and organic solvent pollution in the water body, which is beneficial to environmental protection.

Description

technical field [0001] The invention belongs to the field of material preparation and pollutant treatment, and relates to a preparation method and application of a hydrophobic low-density pomelo peel carbon airgel. Background technique [0002] In recent years, with the rapid development of various industries, the problem of oil pollution has become increasingly serious. Oil pollution mainly comes from oil spills after tankers are damaged during transportation, and the discharge of oily wastewater from urban industries. Leakage of a large amount of oil into the water body will cause huge economic losses, cause large-scale water pollution, affect the production and life of coastal residents, and threaten life and health. In order to solve the existing oil pollution problem, conventional oil pollution treatment methods can be divided into: adsorption method, flocculation method, biochemical method and air flotation method. Among them, the adsorption method is a method of sel...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
CPCB01J20/20B01J20/28047B01J2220/4825C02F1/286
Inventor 刘燕彭建波李廷伟秦长春仇建刘占超张文莉
Owner JIANGSU UNIV
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