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In-situ preparation method for magnetic wood-based material

A technology of in-situ preparation of wood-based materials, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as long time and complicated preparation process, Achieve the effects of low cost, simple process, and high-efficiency catalytic degradation performance

Inactive Publication Date: 2019-03-22
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2013, Li Jian and others proposed "a kind of in-situ growth of magnetic nano-Fe on the surface of wood". 3 o 4 method" patent application (publication number: CN103692519A), by immersing wood into 3+ and Fe 2+ The hydrothermal reaction in the reducing sugar mixed solution, and then treated with alkaline solution, obtained the in situ growth of magnetic nano-Fe on the surface. 3 o 4 wood, this technical solution needs to add additional reducing substances to prepare magnetic materials, which has the disadvantages of complicated preparation process and long time

Method used

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  • In-situ preparation method for magnetic wood-based material
  • In-situ preparation method for magnetic wood-based material
  • In-situ preparation method for magnetic wood-based material

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Soak the balsa wood block in 0.3mol / L ferric nitrate solution, the ratio of the volume (mL) of the iron salt solution to the weight (g) of the block is 75:1; magnetically stir for 2 hours at room temperature, mix the solution with the wood The blocks were transferred together into a stainless steel autoclave, sealed, and placed in a constant temperature drying oven at 200°C for 8 hours. After the reaction, the product is filtered to obtain a magnetic wood-based precursor, which is washed with water and absolute ethanol until the residual iron ion concentration in the precursor is 0.05g / L, and alternately washed with water and absolute ethanol to reach the above standard. Yes, after washing and drying, put the precursor in a tube furnace, feed nitrogen gas, raise the temperature to 900°C at a rate of 10°C / min, and keep at this temperature for 2 hours to obtain a magnetic wood-based material. Its shape is as follows image 3 As shown, it can be seen that the magnetic wood...

Embodiment 2

[0039] Get the basswood block and soak it in 2mol / L ferric chloride solution, the volume (mL) of the iron salt solution and the weight (g) ratio of the block are 85:1, stir magnetically for 5h at room temperature, and mix the solution with the block Transfer them together to a stainless steel autoclave, seal it, and place it in a constant temperature drying oven at 240°C for 10 hours. Filter the reacted product to obtain a magnetic wood-based precursor, wash the precursor with water and absolute ethanol until the residual iron ion concentration in the precursor is 0.1g / L, alternately wash with water and absolute ethanol until the above standard is reached, After washing and drying, the precursor was placed in a tube furnace, fed with nitrogen, and the temperature was raised to 800°C at a rate of 5°C / min, and kept at this temperature for 3 hours to obtain a magnetic wood-based material.

Embodiment 3

[0041] Soak the white pine wood block in 1mol / L ferrous sulfate solution, the ratio of the volume (mL) of the iron salt solution to the weight (g) of the wood block is 100:1, stir magnetically for 4 hours at room temperature, and put the solution and the wood block together Transfer to a stainless steel autoclave, seal it, and place it in a constant temperature drying oven at 180°C for 9 hours. Filter the reacted product to obtain a magnetic wood-based precursor. Wash the precursor with water and absolute ethanol until the residual iron ion concentration in the precursor is 0.04g / L. Wash with water and absolute ethanol alternately until the above standard is reached. After washing and drying, the precursor was placed in a tube furnace, fed with nitrogen, and the temperature was raised to 1000°C at a rate of 8°C / min, and kept at this temperature for 1 hour to obtain a magnetic wood-based material.

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Abstract

The invention discloses an in-situ preparation method for a magnetic wood-based material. In the method, natural wood is used as a raw material and mixed with ferric salt, the magnetic wood-based material is prepared by two steps of a hydrothermal step and a high-temperature carbonization step, and active functional groups, such as hydroxyl groups and phenylpropylhydroxyl groups, in cellulose, hemicellulose and lignin in the wood reduce the ferric salt in situ under hydrothermal and high-temperature carbonization temperature to produce the magnetic wood-based material doped with zero-valent iron, ferric oxide and iron carbide. The prepared material has very good magnetism and catalytic activity, can be used for the fields of wastewater treatment, air purification and the like. The materialhas the advantages of low preparation cost and easy operation, is environmentally friendly without pollution, can effectively lower the toxicity of various pollutants in environment treatment and iswide in application range.

Description

technical field [0001] The invention relates to an in-situ preparation method of a magnetic wood-based material and its application in the fields of sewage treatment, gas purification and the like. Background technique [0002] In recent years, with the rapid development of industry, the types and quantities of artificially synthesized organic compounds are increasing day by day, and more and more organic compounds are widely used in people's lives. While improving the quality of human life, these organic compounds have also brought a series of environmental pollution problems. Among them, water pollution is a serious threat to human health, which has attracted great attention from governments all over the world. At present, the domestic sewage treatment technology is relatively mature, but industrial wastewater often contains a large amount of toxic, harmful and refractory organic pollutants such as polychlorinated biphenyls, polycyclic aromatic hydrocarbons, and dyes. Ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745
CPCB01J23/745B01J35/33
Inventor 艾仕云马晴晴时伟杰
Owner SHANDONG AGRICULTURAL UNIVERSITY
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