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In-situ MgO template preparing method and application of magnetic mesoporous carbon nanospheres with high adsorptive property

A nano-microsphere, high-adsorption technology, used in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc.

Inactive Publication Date: 2016-04-13
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005]The purpose of the present invention is to solve the problems of cumbersome synthesis steps, high toxicity of raw materials and limited adsorption capacity when preparing magnetic carbon by traditional methods

Method used

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  • In-situ MgO template preparing method and application of magnetic mesoporous carbon nanospheres with high adsorptive property
  • In-situ MgO template preparing method and application of magnetic mesoporous carbon nanospheres with high adsorptive property
  • In-situ MgO template preparing method and application of magnetic mesoporous carbon nanospheres with high adsorptive property

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 0.6g magnesium citrate at 600, 700 and 800 o Under the condition of C, calcined under the condition of tube furnace under nitrogen atmosphere for 2h, and the heating rate was 5 o C / min, use 0.5molL of the calcined product -1 HNO 3 After washing away the MgO template, wash it with high-purity water several times, and dry it for storage.

[0038] figure 1 is Magnesium Citrate 600 o N of the mesoporous carbon material obtained after C calcination 2 Adsorption / desorption curve (a) and particle size distribution curve (b), it can be seen from the figure that the specific surface area of ​​the material can be as high as 1682m 2 / g, the micropore specific surface area is 466m 2 / g, rich mesopore specific surface area up to 1216m 2 / g, the largest pore volume is 1.12cm 3 / g, the pore size of the prepared mesoporous carbon material is 3.7nm. Compared with other carbon-based materials prepared in the literature, the specific surface area of ​​this material is at a highe...

Embodiment 2

[0040] Preparation of Fe 3 o 4 Magnetic nanoparticles: prepared by co-precipitation method, dissolving 11.68g of ferric chloride and 4.30g of ferrous chloride in 200mL of high-purity water, stirring and heating to 85°C under nitrogen protection. Then quickly add 25mL of 30wt% NH 3 . h 2 O, the color of the solution changes rapidly from orange to black, and stops after 30 minutes of reaction. After cooling to room temperature, wash with water for several times and then wash with ethanol for 3 times to obtain magnetic Fe with a particle size of 10-20nm. 3 o 4 nanosphere 。

[0041] Preparation of Fe 3 o 4 nSiO 2 Nanoparticles: Pipette half of the above Fe 3 o 4 Put the magnetic nanoparticles into a mixed solvent of 160mL ethanol and 40mL high-purity water, and add 5mL of 30wt% NH 3 . h 2 0 and 6mLTEOS, then reacted at room temperature for 12h under mechanical stirring conditions, and after the reaction was completed, washed several times with high-purity water and e...

Embodiment 3

[0044] Fe in Example 2 3 o 4 nSiO 2 The Fe prepared when the mass ratio with magnesium citrate is 0.5 / 9.5 3 o 4 nSiO 2 Add 10mL30wt%H to mC 2 o 2 in (keep H 2 o 2 with Fe 3 o 4 nSiO 2 The solid-to-liquid ratio of mC is 50gL -1 ), after ultrasonic mixing, static reaction in the dark for 12h, followed by washing and drying to obtain Fe 3 o 4 nSiO 2 mC-H 2 o 2 , magnetic mesoporous carbon (Fe 3 o 4 nSiO 2 mC-H 2 o 2 ) for the synthesis of figure 2 shown.

[0045] image 3 It is the Fe prepared in Example 2 3 o 4 nSiO 2 and Fe 3 o 4 nSiO 2 mC (Fe 3 o 4 nSiO 2 and the mass ratio of magnesium citrate is 0.5 / 9.5) and the Fe prepared in Example 3 3 o 4 nSiO 2 mC-H 2 o 2 The infrared spectrum of the figure, where, image 3 a is Fe 3 o 4 nSiO 2 The infrared spectrum; image 3 b is Fe 3 o 4 nSiO 2 Infrared spectrum of mC; image 3 c is Fe 3 o 4 nSiO 2 mC-H 2 o 2 Infrared spectrum chart. In the picture, 580cm -1 The left and right are ...

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Abstract

The invention discloses an in-situ MgO template preparing method and application magnetic mesoporous carbon nanospheres with a high adsorptive property, and belongs to the field of preparing methods of magnetic mesoporous carbon nanospheres. The in-situ MgO template preparing method of the magnetic mesoporous carbon nanospheres with the high adsorptive property comprises the steps that Fe3O4@nSiO2 and a magnesium citrate solid are mixed and ground evenly, the ground mixture is calcined in a nitrogen atmosphere and then washed with HNO3 and high-purity water in sequence, and the magnetic mesoporous carbon nanospheres with the high adsorptive property are obtained, wherein the mass ratio of Fe3O4@nSiO2 to the magnesium citrate solid is (0-5):(5-10). The in-situ MgO template preparing method and application of the magnetic mesoporous carbon nanospheres with the high adsorptive property have the advantages that the method is simple, efficient, low in cost, environmentally friendly, capable of being applied to mass preparation and the like; a prepared magnetic mesoporous carbon nanosphere adsorbing agent has a large specific surface area and a large pore volume and has the advantages of high adsorption capacity, a wide pH range, high adsorption efficiency and the like on the aspects of adsorbing metal ions such as Cu ions and Pb ions; the magnetic mesoporous carbon nanospheres prepared through the method can be applied to the fields such as wastewater treatment, medicine release and catalytic carriers.

Description

technical field [0001] The invention relates to a preparation method of magnetic mesoporous carbon nanospheres, in particular to an in-situ MgO template preparation method and application of magnetic mesoporous carbon nanospheres with high adsorption performance. Background technique [0002] Carbon-based materials are ubiquitous, and carbon-based materials mainly include activated carbon, carbon nanofibers, carbon nanotubes, mesoporous carbon, graphene, and carbide-derived carbon. Carbon-based materials have a large specific surface area, developed porosity, good thermal stability and acid and alkali resistance, so they have a wide range of applications in important technical fields, including separation technology, heterogeneous catalysis, water treatment, stationary phase materials and future development For energy regeneration and storage, etc. Wherein, the mesoporous carbon material refers to a porous carbon material with a pore diameter of 2-50 nm. Mesoporous carbon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/32C02F1/28C02F1/62
CPCB01J20/06B01J20/103B01J20/20B01J20/28009B01J20/28021B01J20/3204B01J20/3287C02F1/281C02F1/288
Inventor 胡斌张强英何蔓陈贝贝
Owner WUHAN UNIV
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