Magnetic iron oxide/sepiolite nanocomposite and preparation method and application thereof

A nano-composite material and magnetic iron oxide technology, which is applied in chemical instruments and methods, alkali metal oxides/hydroxides, alkali metal compounds, etc., can solve the problems of high toxicity, and achieve simple operation, large capacity, and powerful physical The effect of adsorption

Inactive Publication Date: 2015-04-22
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, As(III) is more toxic than As(V), mainly due to the stronger toxicity and mobility of As(III)

Method used

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  • Magnetic iron oxide/sepiolite nanocomposite and preparation method and application thereof
  • Magnetic iron oxide/sepiolite nanocomposite and preparation method and application thereof
  • Magnetic iron oxide/sepiolite nanocomposite and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the magnetic iron oxide / sepiolite nanocomposite material prepared in this example is as follows: prepare a sepiolite solution with a concentration of 12.5g / L, add a certain amount of glucose, and make the mass ratio of sepiolite to glucose The ratio is 1:5; after stirring at 400rpm for 24 hours, put the mixed solution A into the reaction kettle for hydrothermal carbonization reaction at 160°C for 48h, and wash the brown substance formed by the reaction with deionized water and absolute ethanol, and heat it at 60°C After drying in an oven, sepiolite nanofibers with multifunctional active groups are obtained; sepiolite nanofibers and iron acetylacetonate are formulated into a certain concentration of mixed solution B at a mass ratio of 1:2, and the Stir for 12 hours, mix well and put it into the reaction kettle to carry out solvothermal reaction at 220°C for 12 hours. The solvent used in the solvothermal reaction is triethylene glycol solution. Th...

Embodiment 2

[0027]The preparation method of the magnetic iron oxide / sepiolite nanocomposite material prepared in this example is as follows: prepare a sepiolite solution with a concentration of 12.5g / L, add a certain amount of glucose, and make the mass ratio of sepiolite to glucose The ratio is 1:2; after stirring for 24 hours, put the mixed solution A into the reaction kettle for hydrothermal carbonization reaction at 160°C for 70h, and the brown substance produced by the reaction is washed with deionized water and absolute ethanol, and dried in an oven at 60°C to obtain Sepiolite nanofibers with multifunctional active groups; prepare sepiolite nanofibers and iron acetylacetonate at a mass ratio of 1:3 to form a mixed solution B of a certain concentration, mix them uniformly and put them into a reaction kettle at a temperature of 220°C Carry out solvothermal reaction for 7 hours, wash the generated material with deionized water, dry it in vacuum for 5 hours, grind the dried solid into po...

Embodiment 3

[0029] The preparation method of the magnetic iron oxide / sepiolite nanocomposite material prepared in this example is as follows: prepare a sepiolite solution with a concentration of 12.5g / L, add a certain amount of glucose, and make the mass ratio of sepiolite to glucose The ratio is 1:7.5; after stirring for 24 hours, put the mixed solution A into the reaction kettle for hydrothermal carbonization reaction at 160°C for 30 hours, wash the brown substance formed by the reaction with deionized water and absolute ethanol, and dry it in an oven at 60°C to obtain Sepiolite nanofibers with multifunctional active groups; prepare sepiolite nanofibers and iron acetylacetonate at a mass ratio of 1:4 to form a mixed solution B of a certain concentration, mix them evenly and put them into a reaction kettle at a temperature of 220°C Carry out solvothermal reaction for 22 hours, wash the generated material with deionized water, vacuum dry for 9 hours, grind the dried solid into powder, and ...

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Abstract

The invention provides a magnetic iron oxide/sepiolite nanocomposite. The nanocomposite is powdery and prepared through the following steps that sepiolite and glucose serve as raw materials, mixed liquid A is prepared, a hydrothermal carbonization reaction is conducted, a generated brown substance is washed, and after the brown substance is dried, sepiolite nanofibers with multifunctional active groups are acquired; mixed liquid B is prepared from the sepiolite nanofibers and ferric acetylacetonate and stirred, after being evenly mixed, the sepiolite nanofibers and the ferric acetylacetonate are placed in a reaction kettle for a solvothermal reaction, a generated substance is washed, dried and ground into powder, aerobic calcination is conducted, and therefore the magnetic iron oxide/sepiolite nanocomposite is acquired. By the adoption of the magnetic iron oxide/sepiolite nanocomposite, inorganic trivalent arsenic removal efficiency is high, capacity is large, cyclic use is achieved, the nanocomposite has the magnetic performance so as to be separated rapidly, and recycling and reuse are achieved. Meanwhile, a preparation method of the magnetic iron oxide/sepiolite nanocomposite is provided and the magnetic iron oxide/sepiolite nanocomposite has the advantages of being low in cost, easy and convenient to operate, easy to synthesize on a large scale and the like.

Description

technical field [0001] The invention provides a preparation method and application of a magnetic iron oxide / sepiolite nanocomposite material, belonging to the technical field of water purification. Background technique [0002] Today, due to the large population and its frequent industrial activities, the pollution of drinking water by heavy metals has gradually increased and has become an important issue of global concern. Therefore, the removal of toxic metal ions from aqueous solutions is important to protect public health. Arsenic is a highly toxic and carcinogenic heavy metal pollutant. Arsenic pollution in groundwater has attracted widespread attention in recent years. It mainly comes from the leaching of rocks and sediments containing arsenic sources, and the use of arsenic-containing substances such as pesticides and wood preservatives. Long-term exposure to arsenic can cause cancer in various organs such as the skin, lungs, and kidneys. In my country alone, the nu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30B01J20/28C02F1/28C02F1/62
CPCB01J20/12B01J20/28009B01J20/3085B01J2220/4806C02F1/288C02F1/62
Inventor 田娜田熙科杨超周朝昕金航罗东岳王龙艳
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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