A kind of preparation method of magnetic adsorption material

A magnetic adsorption material and magnetic separation technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as lack of superparamagnetism, easy sedimentation in the adsorption process, complicated preparation process, etc., to achieve Excellent magnetic adsorption separation performance, simple preparation method and simple operation

Active Publication Date: 2019-10-18
山西清泽阳光环保科技有限公司
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Problems solved by technology

[0005] In order to solve the technical problems existing in the prior art that the preparation process is complicated, promotion is difficult, the particle size of the obtained material is large, the adsorption process is easy to settle, and there is no superparamagnetism, the present invention provides a magnetic adsorption material with superparamagnetism and its The preparation method, the prepared magnetic adsorption material is applied to water pollution control, the magnetic adsorption material and its surface state are formed at one time, the controllable preparation of the magnetic adsorption material is realized in the nanometer scale, and the superparamagnetism and strong magnetism of the magnetic adsorption material are guaranteed Responsiveness, in-situ modification of chitosan on the surface of the magnetic adsorption material to ensure the water dispersibility and strong adsorption performance of the magnetic adsorption material, the preparation process is efficient and fast, and the cost is low

Method used

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  • A kind of preparation method of magnetic adsorption material
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  • A kind of preparation method of magnetic adsorption material

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1. Preparation of magnetic adsorption materials

[0035] (1) Fe 0 Preparation of iron powder (reduced iron powder): 0.5 mmol of FeSO 4 7H 2 O was dissolved in 10 mL of deionized water to form a transparent solution, labeled as solution 1; similarly, 1 mmol NaBH 4 Dissolved in 10 mL deionized water, marked as solution 2; solution 2 was added dropwise to solution 1 at a rate of 20 s / mL, and after the generation of bubbles stopped, the resulting black solid was collected by magnetic separation, and finally in Repeatedly washing 3 times in deionized water, Fe can be obtained 0 iron powder.

[0036] (2) Chitosan-coated Fe 3 o 4 Preparation: Fe obtained in step 1 0 Add iron powder, 0.2g chitosan and 1.5mmol NaOH to 20 mL deionized water to dissolve and disperse, keep the pH of the mixed solution at 7, keep it under vigorous magnetic stirring for 20min; transfer the obtained mixed solution to a hydrothermal kettle , kept at 80°C for 60min; the product after hydrotherma...

Embodiment 2

[0043] 1. Preparation of magnetic adsorption materials

[0044] (1) Fe 0 Preparation of iron powder (reduced iron): 0.9 mmol FeSO 4 7H 2 O was dissolved in 10 mL deionized water to form a transparent solution, labeled as solution 1; similarly, 1.5 mmol NaBH 4 Dissolved in 10 mL of deionized water, marked as solution 2; solution 2 was added dropwise to solution 1, and after the generation of bubbles stopped, the resulting black solid was collected by magnetic separation, and finally washed repeatedly in deionized water for 6 times, can get Fe 0 iron powder.

[0045] (2) Chitosan-coated Fe 3 o 4 Preparation: the prepared Fe 0 Add iron powder, 0.5 g chitosan and 2 mmol NaOH to 20 mL deionized water to dissolve and disperse, keep the pH of the mixed solution at 8, and keep it under vigorous magnetic stirring for 20 min; transfer the obtained mixed solution to a hydrothermal kettle , kept at 100°C for 120 min; the product after hydrothermal reaction was collected by magneti...

Embodiment 3

[0051] 1. Preparation of magnetic adsorption materials

[0052] (1) Fe 0 Preparation of iron powder (reduced iron): 0.8 mmol FeSO 4 7 hours 2 O was dissolved in 10 mL of deionized water to form a transparent solution, labeled as solution 1; similarly, 1.4 mmol NaBH 4 Dissolve in 10 mL of deionized water and mark it as solution 2; add solution 2 to solution 1 dropwise at 15 s / mL; after the generation of bubbles stops, collect the obtained black solid by magnetic separation, and finally repeat in deionized water Wash 5 times to get Fe 0 iron powder.

[0053] (2) Chitosan-coated Fe 3 o 4 Preparation: the prepared Fe 0 Add iron powder, 0.4g chitosan and 1.5mmol NaOH to 20 mL deionized water to dissolve and disperse, keep the pH of the mixed solution at 7, keep it under vigorous magnetic stirring for 20min; transfer the obtained mixed solution to a hydrothermal kettle , kept at 90°C for 100 min; the product after hydrothermal reaction was collected by magnetic separation, w...

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Abstract

The invention provides a preparation method of a magnetic adsorption material, and belongs to the technical field of new materials. The invention has the specific technical scheme that according to the preparation method of the magnetic adsorption material, one-step preparation of a magnetic nano adsorption material is realized under a relative low temperature through a hydrothermal method, the surface of the obtained magnetic adsorption material is coated with a surface stabilizer, and very good superparamagnetism is obtained, so that the magnetic adsorption material has very good dispersity and stability in water; in addition, the magnetic adsorption material prepared through the preparation method has very strong saturated magnetization intensity, very good magnetic response property and excellent magnetic separation characteristic; based on a chitosan structure characteristic of the surface of the magnetic adsorption material, the magnetic adsorption material has very strong adsorption performance on organic matters and inorganic ions, is totally of a flaky two-dimensional structure, has a heterostructure of a large-scale flaky matter (ferroferric oxide) and small nanoparticles (ferrum), has a large specific surface area, has a large adsorption area on a target object and has a very high application value in sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method of a magnetic adsorption material. Background technique [0002] In recent years, the problem of environmental water pollution has become increasingly serious, especially the water pollution of heavy metals and organic compounds, which seriously endangers the ecological environment and threatens human health. Therefore, the detection and treatment of water pollutants have attracted much attention. In terms of water treatment, adsorption removal is one of the effective methods, and the development of efficient and stable adsorption materials has become the focus. Adsorbent materials use surface van der Waals force, particle exchange, and chemical coordination to remove pollutants. [0003] At present, as a hot material, magnetic adsorption materials have received extensive attention in the preparation of adsorption materials. Firstly, the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C02F1/28
Inventor 安建宾范可范为张祥武志强
Owner 山西清泽阳光环保科技有限公司
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