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Magnetic ferromanganese oxide-loaded mesoporous cellulose biochar composite, and preparation method and application thereof

A technology of ferromanganese oxides and composite materials, applied in the fields of alkali metal oxides/hydroxides, chemical instruments and methods, alkali metal compounds, etc., to achieve the effects of low price, easy operation, and high magnetic saturation

Active Publication Date: 2018-10-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Judging from the existing research, how to make full use of the biomass resource cellulose and prepare positively charged biochar adsorption materials through a simple method; how to improve the dispersion stability of the metal oxide nanoparticle adsorption materials still needs further study

Method used

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  • Magnetic ferromanganese oxide-loaded mesoporous cellulose biochar composite, and preparation method and application thereof
  • Magnetic ferromanganese oxide-loaded mesoporous cellulose biochar composite, and preparation method and application thereof
  • Magnetic ferromanganese oxide-loaded mesoporous cellulose biochar composite, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Embodiment 1: the preparation of a kind of mesoporous cellulose biochar (MCB)

[0065] The cellulose was placed in a tube furnace, and the temperature was raised to 300 °C at a heating rate of 5 °C / min. 2 Carbonize under airflow for 60 minutes to obtain cellulose charcoal (CB); mix the above cellulose charcoal with potassium hydroxide at a mass ratio of 1:3, and then add water to it to keep the lye concentration of 30wt%. The above solution was dried in an oven at 80°C to obtain cellulose biochar-potassium hydroxide (CB-KOH); the above-mentioned cellulose biochar-alkali was placed in a tube furnace at a heating rate of 5°C / min heating up to 700°C, under continuous N 2 The cellulose biochar (CB-700) was obtained by incubating under air flow for 60 minutes. After cooling, it was washed with water until neutral, and dried in vacuum at 30° C. for 12 hours to obtain mesoporous cellulose biochar (MCB-700).

Embodiment 2

[0066] Embodiment 2: the preparation of a kind of mesoporous cellulose biochar (MCB)

[0067] The cellulose was placed in a tube furnace, and the temperature was raised to 250 °C at a heating rate of 3 °C / min. 2 Carbonize under airflow for 80 minutes to obtain cellulose charcoal (CB); mix the above cellulose charcoal with potassium hydroxide at a mass ratio of 1:2, and then add water to it to keep the lye concentration of 20wt%. The above solution was dried in an oven at 70°C to obtain cellulose biochar-potassium hydroxide (CB-KOH); the above-mentioned cellulose biochar-alkali was placed in a tube furnace at a heating rate of 3°C / min heated up to 550°C under continuous N 2 The cellulose biochar (CB-550) was obtained by incubating under airflow for 240 minutes. After cooling, it was washed with water until neutral, and dried in vacuum at 20°C for 24 hours to obtain mesoporous cellulose biochar (MCB-550).

Embodiment 3

[0068] Embodiment 3: the preparation of a kind of mesoporous cellulose biochar (MCB)

[0069] The cellulose was placed in a tube furnace, and the temperature was raised to 350 °C at a rate of 8 °C / min. 2 Carbonize under airflow for 40 minutes to obtain cellulose charcoal (CB); mix the above cellulose charcoal with potassium hydroxide at a mass ratio of 1:4, and then add water to it to maintain a lye concentration of 40wt%. The above solution was dried in an oven at 90°C to obtain cellulose biochar-potassium hydroxide (CB-KOH); the above-mentioned cellulose biochar-alkali was placed in a tube furnace at a heating rate of 8°C / min heated up to 850°C under continuous N 2 The cellulose biochar (CAC-850) was obtained by incubating under air flow for 30 minutes. After cooling, it was washed with water until neutral, and dried in vacuum at 40°C for 6 hours to obtain mesoporous cellulose biochar (MCB-850).

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Abstract

The invention belongs to the technical field of biomass resource recycling and new environmental functional materials, discloses a magnetic ferromanganese oxide-loaded mesoporous cellulose biochar composite, a preparation method thereof and application of the mesoporous cellulose biochar composite in environmental governance and remediation, and is particularly applicable to the field of adsorption of anionic pollutants. The preparation method comprises preparing mesoporous cellulose biochar, compositing MnFe2O4 in one step according to a solvothermal method, and loading the MnFe2O4 onto the mesoporous cellulose biochar to obtain the magnetic ferromanganese oxide-loaded mesoporous cellulose biochar composite. The mesoporous cellulose biochar composite prepared according to the method has the characteristics of strong magnetism, capability of being charged positively under acidic conditions, high dispersion stability, high adsorptive property and the like, can be widely applied to the field of environmental governance and remediation, is particularly applicable to pollution remediation of the anionic pollutants, such as adsorption of heavy metal and organophosphorus pesticides, andhas the glyphosate adsorption capacity as high as 167.2mg / g.

Description

technical field [0001] The invention belongs to the technical field of biomass resource reuse and new environmental functional materials, in particular to a mesoporous cellulose biochar composite material (MnFe 2 o 4 @MCB) and its preparation method and application in the field of environmental remediation, especially suitable for the field of anionic pollutant adsorption. Background technique [0002] With the rapid development of industries such as mining, batteries and electroplating, the wide application of chemical fertilizers and pesticides in agricultural production, and the diversification of human life, many heavy metals and organic pollutants are discharged into water bodies and soils. These pollutants can enter the human body through the action of the food chain, posing a potential threat to human life and health, and a considerable part of them are anionic pollutants. In this regard, scholars have conducted a lot of research and made some progress, among which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30C02F101/34
CPCB01J20/06B01J20/20B01J20/28009B01J2220/4812B01J2220/4875C02F1/281C02F1/283C02F2101/306C02F2101/34
Inventor 章莉娟陈全郑杰伟党志
Owner SOUTH CHINA UNIV OF TECH
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