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Method for in-situ synthesis of FeOOH/Fe3O4/cellulose composite material and application thereof

A composite material and in-situ synthesis technology, applied in chemical instruments and methods, water/sludge/sewage treatment, organic compound/hydride/coordination complex catalysts, etc., can solve poor degradation effect and secondary pollution , Difficult to recycle and other issues, to achieve the effect of maintaining integrity and stability, large degree of combination, and high porosity

Active Publication Date: 2020-09-29
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]However, the composite materials currently used for catalytic degradation of Congo red have poor degradation effect, are difficult to recycle and easily cause secondary pollution

Method used

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  • Method for in-situ synthesis of FeOOH/Fe3O4/cellulose composite material and application thereof
  • Method for in-situ synthesis of FeOOH/Fe3O4/cellulose composite material and application thereof
  • Method for in-situ synthesis of FeOOH/Fe3O4/cellulose composite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1 FeOOH / Fe 3 o 4 / Preparation of cellulose

[0059] An in-situ synthesis of FeOOH / Fe 3 o 4 / the method for cellulose composite material, specifically comprises the following steps:

[0060] (1) Pretreatment of cellulose: the cellulose and FeCl 3 Mix evenly according to the mass ratio of 45:1 and add it to the ball mill tank for ball milling reaction. Control the reaction temperature at 50°C and the reaction time for 1.5h, and then obtain mechanical activation + FeCl by sieving 3 pretreated cellulose.

[0061] (2) Dissolution of cellulose: add the pretreated cellulose into 7wt% NaOH / 12wt% urea solution according to the mass ratio of 1:9 and mix evenly, then place it at -12°C for 12 hours and thaw immediately to obtain the mixture. The mixture was first stirred at 600 rpm for 8 min, then centrifuged at 9000 rpm for 11 min, and the supernatant was taken to obtain a cellulose solution.

[0062] (3) Fe 3 o 4 / Cellulose composite preparation: according to ...

Embodiment 2

[0064] Example 2 FeOOH / Fe 3 o 4 / Preparation of cellulose

[0065] An in-situ synthesis of FeOOH / Fe 3 o 4 / the method for cellulose composite material, specifically comprises the following steps:

[0066] (1) Pretreatment of cellulose: the cellulose and FeCl 3 Mix evenly according to the mass ratio of 40:1, then add it to the ball mill tank for ball milling reaction, control the reaction temperature at 30°C, and the reaction time is 2h, and then obtain mechanical activation + FeCl by sieving 3 pretreated cellulose.

[0067] (2) Dissolution of cellulose: add the pretreated cellulose into 8wt% NaOH / 12wt% urea solution according to the mass ratio of 1:8 and mix evenly, and then freeze at -10°C for 10h and thaw immediately to obtain the mixture. The mixture was first stirred at 800 rpm for 5 min, then centrifuged at 10000 rpm for 10 min, and the supernatant was taken to obtain a cellulose solution.

[0068] (3) Fe 3 o 4 / Cellulose composite preparation: according to Fe...

Embodiment 3

[0070] Example 3 FeOOH / Fe 3 o 4 / Preparation of cellulose

[0071] An in-situ synthesis of FeOOH / Fe 3 o 4 / the method for cellulose composite material, specifically comprises the following steps:

[0072] (1) Pretreatment of cellulose: the cellulose and FeCl 3 Mix evenly according to the mass ratio of 50:1, then add it to the ball mill tank for ball milling reaction, control the reaction temperature at 60°C, and the reaction time is 1h, and then obtain mechanical activation + FeCl by sieving 3 pretreated cellulose.

[0073] (2) Dissolution of cellulose: the pretreated cellulose is added into 5wt% NaOH / 12wt% urea solution according to the mass ratio of 1:8-10 and mixed evenly, then placed at -15°C for 15h and then thawed immediately to obtain The mixture is first stirred at 500 rpm for 10 min, then centrifuged at 8000 rpm for 12 min, and the supernatant is taken to obtain a cellulose solution.

[0074] (3) Fe 3 o 4 / Cellulose composite preparation: according to Fe ...

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Abstract

The invention discloses a method for in-situ synthesis of a FeOOH / Fe3O4 / cellulose composite material and application thereof. The preparation method comprises the following steps: dissolving cellulosepretreated by mechanical activation in cooperation with FeCl3 into a NaOH / urea solution; by taking a cellulose solution as a precipitator and a template agent, synthesizing a Fe3O4 / cellulose compoundin situ by adopting a coprecipitation method; then generating needle-shaped FeOOH on the surface of the Fe3O4 / cellulose to obtain the FeOOH / Fe3O4 / cellulose composite material which is used for catalytic degradation of Congo red. The composite material has a very good catalytic degradation effect, and is good in reuse performance and stability. The method disclosed by the invention is simple and low in cost, and the synthesized FeOOH / Fe3O4 / cellulose composite material is good in stability, can effectively and quickly catalyze and degrade dye Congo red in heterogeneous Fenton reactions, and hasa good application prospect.

Description

technical field [0001] The invention belongs to the technical field of magnetic composite material preparation, in particular to an in-situ synthesis of FeOOH / Fe 3 o 4 / Cellulose composite materials method and its application. Background technique [0002] Congo red (CR for short) is one of the most commonly used benzidine direct azo dyes in the textile printing and dyeing industry, and is widely used in industrial production and people's daily life. Azo dyes are the largest and most common dyes among known synthetic dyes. They are usually characterized by refractory degradation, high chroma, high toxicity, and potential carcinogenic effects on the human body. At present, for wastewater containing azo dyes, traditional degradation techniques include adsorption, coagulation, reverse osmosis, electrochemical or ozone oxidation, biological methods, etc. However, these methods have obvious defects, although some can make the dyes The color fades, but it cannot meet the COD re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J23/745B01J37/03B01J37/34B01J37/32B01J37/10C02F1/72C02F1/30C02F101/30
CPCB01J31/2213B01J23/745B01J37/031B01J37/342B01J37/32B01J37/10C02F1/722C02F1/725C02F1/30B01J2531/842B01J2531/0213C02F2101/308C02F2305/026C02F2305/10B01J35/23B01J35/39Y02W10/37
Inventor 张燕娟屠儒黄祖强胡华宇梁景陈丛瑾覃宇奔
Owner GUANGXI UNIV
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