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A preparing method and application of an oyster shell powder-ferric oxide nanometer composite material

An iron oxide nanometer and composite material technology is applied in the field of preparation of oyster shell powder iron oxide nanocomposite materials, which can solve the problems of low added value of oyster shells, pollution of oyster shells, weak adsorption capacity and the like, and achieves a simple preparation method and good adsorption. Removal power, easy-to-control effects

Inactive Publication Date: 2018-06-15
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low added value of oyster shells, most of them are discarded on the beach and roadside, causing oyster shell pollution
Oyster shell is a nanocomposite material composed of calcium carbonate and biological macromolecules. After high-temperature calcination, the organic matter volatilizes to form a porous structure. It shows a certain adsorption capacity for organic matter, but this adsorption mainly comes from Ca(II) on organic matter. Electrostatic adsorption containing groups such as N or O has weak adsorption capacity, which limits its application in wastewater treatment and other aspects

Method used

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Experimental program
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Effect test

Embodiment 1

[0022] 1. Preparation of nanocomposite precursor powder:

[0023] Soak 100-mesh oyster shell powder in 0.15 mol·L -1 The ferric nitrate solution (the solid-to-liquid ratio of powder to solution (g:mL) is 1:4) was stirred and soaked at room temperature for 12 h, filtered and dried to obtain the nanocomposite precursor powder.

[0024] 2. Preparation of composite materials:

[0025] Put the above-mentioned nanocomposite precursor powder into a crucible and place it in a high-temperature furnace, heat it up to 900°C at a rate of 300°C / h and keep it warm for 6 hours for calcination reaction. After the reaction is completed, naturally cool to room temperature and take it out to obtain oyster shells Powdered iron oxide nanocomposites.

Embodiment 2

[0027] 1. Preparation of nanocomposite precursor powder:

[0028] Soak 100-mesh oyster shell powder in 0.10 mol·L -1 In ferric nitrate solution (the ratio of powder to solution (g:mL) is 1:4), stir and soak at room temperature for 12 h, filter and dry to obtain the nanocomposite precursor powder.

[0029] Second, the preparation of nanocomposites:

[0030] Put the above-mentioned nanocomposite precursor powder into a crucible and place it in a high-temperature furnace, heat it up to 900°C at a rate of 300°C / h and keep it warm for 6 hours for calcination reaction. After the reaction is completed, naturally cool to room temperature and take it out to obtain oyster shells Powdered iron oxide nanocomposites.

Embodiment 3

[0032] 1. Preparation of rice composite material precursor powder:

[0033] Soak 100-mesh oyster shell powder in 0.05 mol·L -1 In ferric nitrate solution (the ratio of powder to solution (g:mL) is 1:4), stir and soak at room temperature for 12 h, filter and dry to obtain the nanocomposite precursor powder.

[0034] Second, the preparation of rice composite materials:

[0035] Put the above-mentioned nanocomposite precursor powder into a crucible and place it in a high-temperature furnace, heat it up to 900°C at a rate of 300°C / h and keep it warm for 6 hours for calcination reaction. After the reaction is completed, naturally cool to room temperature and take it out to obtain oyster shell powder Iron oxide nanocomposites.

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Abstract

A preparing method of an oyster shell powder-ferric oxide nanometer composite material is disclosed. The method includes 1) a step of soaking waste oyster shell with diluted hydrochloric acid for a certain period of time, washing the oyster shell with an acid to remove organic and inorganic impurities on the surface, cleaning the oyster shell with distilled water, then putting the oyster shell into a drying oven, drying the oyster shell, crushing the oyster shell, and then sieving the crushed oyster shell with a sieve having a size of 80-300 meshes to obtain oyster shell powder; and 2) a stepof adding the obtained oyster shell powder into a ferric nitrate solution having a concentration of 0.01-1.00 mol.L<-1>, soaking the oyster shell powder under stirring for 3-24 h, then performing filtration, drying an obtained product, and calcining the obtained product at 800-1100 DEG C for 2-10 h to obtain the nanometer composite material. The method is stable, reliable, simple and feasible. Thecomposite material is used for treatment of azo dye wastewater and has good adsorption performance on azo dye.

Description

technical field [0001] The invention relates to the technical field of a preparation method for preparing a nanocomposite material and its application for treating azo dye wastewater, in particular to a preparation method and application of an oyster shell powder iron oxide nanocomposite material. Background technique [0002] Dyes are widely used in printing and dyeing, food, cosmetics and other industries. According to statistics, there are more than 100,000 kinds of dyes for commercial use. my country is a big country in dye production. The textile dye industry has developed rapidly in recent years. At present, the output of various dyes in my country has reached 90 10,000 tons, dye production accounts for about 60% of the world. The production and use of azo dyes are the largest among all dyes. Some azo dyes have been proven to cause cancer, especially in the degradation process of azo dyes. The degradation mechanism is likely to be the first to break the azo group , to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28C02F101/38
CPCB01J20/041B01J20/06B01J20/28007C02F1/281C02F2101/308C02F2101/38
Inventor 杨大鹏刘明焕
Owner QUANZHOU NORMAL UNIV
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