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A kind of preparation method and application of leaf-based biomass carbon airgel

A carbon airgel and biomass technology, applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve the problems of waste of raw materials, complicated process, etc., achieve good adsorption effect, simple operation, and easy steps Effect

Active Publication Date: 2019-08-02
江阴智产汇知识产权运营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these components need to be extracted from biomass resources, the process is complicated and it is easy to cause waste of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of leaf-based biomass carbon airgel, comprising the following steps:

[0031] Step a) Preprocessing of leaves:

[0032] Select fresh, dark green leaves, wash the surface of the leaves with ethanol and water several times in sequence to remove surface impurities, and then put them into an oven at 30° C. to dry to obtain dried leaves.

[0033] Step b) Preparation of biomass hydrogel:

[0034] (1) According to the mass ratio of leaves and deionized water as 1:10, disperse the leaves in water, and put the leaves treated in step a) in a refiner at a water temperature of 30°C to grind to a viscous filter slurry, and water Wash with ethanol several times, and filter with 80-mesh sieve to obtain bright green hydrogel precursor;

[0035] (2) According to the mass ratio of hydrogel precursor and KOH of 1:9, the leaves treated in (1) were added to 8% KOH, and after magnetic stirring in a water bath at 40 °C for 5 h, Wash with water and ethanol several times...

Embodiment 2

[0044] A preparation method of leaf-based biomass carbon airgel, comprising the following steps:

[0045] Step a) Preprocessing of leaves:

[0046] Select fresh, dark green leaves, wash the leaf surface several times with ethanol and water in sequence to remove surface impurities, and then put them into an oven at 60° C. to dry to obtain dried leaves.

[0047]Step b) Preparation of biomass hydrogel:

[0048] (1) According to the mass ratio of leaves and deionized water as 1:5, disperse the leaves in water, and put the leaves treated in step a) in a refiner at a water temperature of 45°C to grind to a viscous filter slurry, and use water Wash with ethanol several times, and filter with 80-mesh sieve to obtain bright green hydrogel precursor;

[0049] (2) Based on the mass ratio of hydrogel precursor and NaOH being 1:12, the leaves treated in (1) were added to 3% NaOH, and after magnetic stirring in a water bath at 60°C for 4 hours, water Wash with ethanol several times, use ...

Embodiment 3

[0058] A preparation method of leaf-based biomass carbon airgel, comprising the following steps:

[0059] Step a) Preprocessing of leaves:

[0060] Select fresh, dark green leaves, wash the surface of the leaves with ethanol and water successively for several times to remove surface impurities, and then put them into an oven at 50° C. to dry to obtain dried leaves.

[0061] Step b) Preparation of biomass hydrogel:

[0062] (1) According to the mass ratio of leaves and deionized water as 1:8, disperse the leaves in water, and put the leaves treated in step a) in a refiner at a water temperature of 40°C to grind to a viscous filter pulp, and use water Wash with ethanol several times, and filter with 80-mesh sieve to obtain bright green hydrogel precursor;

[0063] (2) According to the mass ratio of hydrogel precursor and NaOH of 1:10, the leaves treated in (1) were added to 5% NaOH, and after magnetic stirring in a water bath at 50 °C for 4 h, Wash with water and ethanol seve...

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Abstract

The invention belongs to the technical field of composite materials, relates to preparation of carbon aerogel, and especially relates to a preparation method and an application of leaf-based biomass carbon aerogel. The method comprises the following steps: 1, carrying out cleaning and drying pretreatment on leaves, and grinding and filtering the pretreated leaves to obtain a bright-green hydrogel precursor; adding the hydrogen precursor into a 3-8% alkali solution, cleaning the hydrogel precursor, and filtering out soluble impurities to obtain a purified hydrogel precursor; adding the hydrogel precursor into a manganese-oxygen nanowire dispersion with the mass percentage of 10-30%,, adding the obtained black hydrogel precursor into a carbonate solution to form a hard biomass hydrogel; and freeze-drying the hard biomass hydrogel to obtain biomass aerogel, and carrying out high temperature pyrolysis in an inert gas atmosphere for 1-4 h to obtain the leaf-based biomass carbon aerogel. The method adopting the green and pollution-free leaves as a raw material has the advantages of simplicity in operation, low cost, environmental protection, easiness in separation, greenness and energy saving. The above obtained material has the advantages of simplicity in operation, high adsorption rate and certain practical values when used to treat oil / organic solvent sewage.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to the preparation of carbon aerogels, in particular to a preparation method and application of leaf-based biomass carbon aerogels. Background technique [0002] In recent years, with the rapid economic development of various countries and the rapid increase in the demand for crude oil and petroleum products, petroleum products have been widely used and transported, which has led to an increasing number of oil spills of various sizes. The rising trend poses a great threat to the environment. If the oil spill accident cannot be dealt with in a timely and effective manner, it will have a long-term impact on the local fishery resources and ecological environment. [0003] Nowadays, not only crude oil pollution is serious, but also the treatment of dye-containing wastewater produced by papermaking, textile and other chemical enterprises has also aroused widespread concern in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/20B01J20/28047B01J2220/485C02F1/283C02F2101/30
Inventor 邱凤仙袁登森欧忠平张涛俞汉强荣坚朱瑶
Owner 江阴智产汇知识产权运营有限公司