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Nano composite material as well as preparation method and application thereof to water treatment

A nano-composite material and nano-particle technology, applied in the field of functional materials, can solve problems such as restricting application and endangering human health, and achieve the effect of increasing saturated adsorption capacity and easy separation

Active Publication Date: 2017-03-22
秦皇岛中科瀚祺科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the uneasy separation of graphene and its derivatives limits its application in water treatment; and the ingestion of heavy metal ions in sewage, such as lead, copper, zinc and silver, will seriously harm human health

Method used

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  • Nano composite material as well as preparation method and application thereof to water treatment
  • Nano composite material as well as preparation method and application thereof to water treatment
  • Nano composite material as well as preparation method and application thereof to water treatment

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preparation example Construction

[0033] The present invention also provides a method for preparing the nanocomposite material described in the above technical solution, comprising the following steps:

[0034] (1) mixing the matrix material with water-soluble ferrous salt, water-soluble ferric salt, water-soluble magnesium salt and water to obtain a mixed solution;

[0035] (2) adding alkali solution dropwise to the mixed solution obtained in the step (1), and performing a precipitation reaction to obtain a nanocomposite material.

[0036] In the invention, the matrix material is mixed with water-soluble divalent iron salt, water-soluble ferric salt, water-soluble magnesium salt and water to obtain a mixed solution. In the present invention, the mass concentration of the matrix material in the mixed solution is preferably 0.1-5%, more preferably 0.5-4%, and most preferably 1-3%. In the present invention, Fe in the mixed solution2+ with Fe 3+ The total concentration of is preferably 0.05-5 mol / L, more prefer...

Embodiment 1

[0050] In a 250mL beaker, add 90mL distilled water, 3.2gMg(NO 3 ) 2 ·6H 2 O, 1.2g FeSO 4 ·7H 2 O, 2.2 g FeCl 3 ·6H 2 O and 0.05g graphene oxide powder, use a cell disruptor to disperse with a 15KHz ultrasonic wave for 30min, then transfer the mixed dispersion to a 250mL flask. Aqueous ammonia was slowly added dropwise at a rate of mL / min, 10 mL of aqueous ammonia (25 wt%) was added dropwise, and nitrogen gas was continued for 5 minutes. After the system was closed, it was placed in an oil bath at 70°C for 2 hours, and then the temperature was raised to 90°C to continue the reaction for 10 hours. After the reaction, the reaction product was magnetically separated, washed repeatedly with deionized water three times until the pH value of the solution was neutral, and then the product was dried at -90° C. for 48 h using a freeze dryer to obtain a nanocomposite material.

[0051] The graphene oxide used in this embodiment and the TEM photographs of the nanocomposite material...

Embodiment 2

[0053] Take 0.1g of the nanocomposites prepared in Example 1 respectively, place them in 100mL of PB 2+ Solution, Cu 2+ solution, Ag + solution, Zn 2+ In the solution, use magnetic force to stir for 12 hours, measure with inductively coupled plasma emission spectrometer, because the loaded inorganic particles chelate with the above-mentioned heavy metal ions, the pb 2+ The concentration can be reduced from 98.74ppm before adsorption to 0.0075ppm after adsorption, Cu 2+ The concentration can be reduced from 60.78ppm before adsorption to 0.0052ppm after adsorption, Ag + The concentration can be reduced from 32.93ppm before adsorption to 0.001ppm after adsorption, Zn 2+ The concentration can be reduced from 42.92ppm before adsorption to 0.044ppm after adsorption.

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Abstract

The invention provides a nano composite material as well as a preparation method and application thereof to water treatment. The nano composite material provided by the invention comprises a matrix and nanoparticles loaded on the surface of the matrix, wherein the matrix comprises one or more of graphene and graphene derivatives; and the nanoparticles comprise Fe3O4 and Mg(OH)2. According to the nano composite material provided by the invention, a matrix material is used as the matrix, and the nanoparticle composite material has magnetism through loaded Fe3O4 magnetic nanoparticles and is easy to separate; and meanwhile, the saturation adsorbing capacity of the nano composite material is enlarged, and heavy metal ions are efficiently adsorbed through loaded Mg(OH)2 nanoparticles. According to the nano composite material provided by the invention, the removal rates of Pb<2+>, Cu<2+>, Ag<+> and Zn<2+> with the initial concentration of 50ppm within 90min can reach 99.9%, 99.9%, 88% and 85% respectively.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a nanocomposite material and its preparation method and application in water treatment. Background technique [0002] Graphene is a new carbonaceous material with a two-dimensional honeycomb crystal structure formed by stacking a single layer of carbon atoms. It has high specific surface area, high mechanical strength, good electrical conductivity, good thermal conductivity, room temperature quantum Hall effect, and is easy to Modification and other excellent performance. Based on the various excellent properties of graphene, graphene has been widely used in many fields such as high-sensitivity sensors, supercapacitors, storage units, batteries, electromechanical resonators, and solar cells. [0003] Water is the source of life. With the development of industrial society, more and more pollutants are directly discharged into the groundwater system without treatment....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/20
Inventor 吴敏黄勇黄大勇
Owner 秦皇岛中科瀚祺科技有限公司
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