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Carbon-based magnetic mesoporous composite microsphere and preparation method thereof

A composite microsphere and carbon-based technology, which is applied in the direction of microsphere preparation, microcapsule preparation, and magnetic properties of inorganic materials, can solve the problems of difficult control of the content of the components contained, complex composition, cumbersome steps, etc., and achieve good application prospects , good adsorption performance, simple and economical operation

Inactive Publication Date: 2011-06-29
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The reported or disclosed methods are expensive in terms of carbon sources, and the magnetic components in the composite carbon spheres contain γ-Fe 2 o 3 , Fe 3 C, Fe, the composition is complex, and the components and the content of each component are difficult to control; as far as the preparation of the microsphere precursor and the preparation of the iron-loaded microspheres are concerned, it needs to be distributed, and the steps are relatively cumbersome
Single-phase γ-Fe with high specific surface area 2 o 3 @Carbon-based magnetic mesoporous composite microspheres have not been reported

Method used

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  • Carbon-based magnetic mesoporous composite microsphere and preparation method thereof
  • Carbon-based magnetic mesoporous composite microsphere and preparation method thereof
  • Carbon-based magnetic mesoporous composite microsphere and preparation method thereof

Examples

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Embodiment 1

[0019] Embodiment 1: 4g ferric nitrate (Fe(NO 3 ) 3 ) and 10g glucose (C 6 h 12 o 6 ) was dissolved in 80mL water, stirred to dissolve completely, transferred to 100mL reaction, heated to 200°C, kept for 24h, and then cooled to room temperature in the air. Then take out the feed liquid and dehydrate. The resulting product was dried in air at 80°C for 6 hours to obtain Fe x o y @Carbon-based composite microspheres.

[0020] 5 g dry Fe x o y @Carbon-based composite microspheres are placed in the quartz tube of a tube furnace, and carbon dioxide gas is introduced, and the gas flow rate is 1L / min. Raise to 720°C at a rate of 5°C / min. Keep for 3h. It was then cooled to room temperature under a carbon dioxide atmosphere. Obtain gamma-Fe of the present invention 2 o 3 @Carbon-based composite magnetic mesoporous microspheres.

[0021] Adopt X-ray diffraction to characterize product structure with XpertMPD Philips automatic diffractometer, its XRD test result is as follo...

Embodiment 2

[0024] Embodiment 2: adopt sucrose (C 12 h 22 o 11 ) is the carbon source, according to the mass ratio m(Fe(NO 3 ) 3 ):m(C 12 h 22 o 11) = 0.8: 1 ratio feeding, ferric nitrate and sucrose consumption are 4g and 5g respectively, hydrothermal time 20h, carbon dioxide gas flow is 0.5L / min during activation, activation temperature is 800 ℃, keeps 2h. Others are as embodiment 1 implemented in the same way.

[0025] γ-Fe 2 o 3 The analysis results of @carbon composite magnetic mesoporous microspheres are as follows:

[0026] XRD shows that the carbon sphere-based material contains γ-Fe 2 o 3 (See figure 1 Middle curve c), calculated γ-Fe 2 o 3 is 26 nanometers, and the specific surface of microspheres is 287m 2 / g, the average pore diameter is 8nm, and the pore volume is 0.26cm 3 / g.

Embodiment 3

[0027] Embodiment 3: adopt glucose as carbon source, by mass ratio m (Fe (NO 3 ) 3 ):m(C 6 h 12 o 6 )=0.6:1 ratio feeding, ferric nitrate and glucose consumption were 6g and 10g, hydrothermal time 18h; carbon dioxide gas flow was 2L / min during activation, activation temperature was 650 ℃, kept 4h. Others are carried out in the same manner as in Example 1.

[0028] γ-Fe 2 o 3 The analysis results of @carbon composite magnetic mesoporous microspheres are as follows:

[0029] XRD shows that the carbon sphere-based material contains γ-Fe 2 o 3 (See figure 1 The middle curve a) calculates γ-Fe 2 o 3 to 10 nm. The specific surface of the microsphere is 276m 2 / g, the average pore diameter is 4nm, and the pore volume is 0.15cm 3 / g.

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Abstract

The invention provides a carbon-based magnetic mesoporous composite microsphere and a preparation method thereof, belonging to the technical field of the preparation of an inorganic composite material. The diameter of the carbon-based magnetic mesoporous composite microsphere particle is 3-6 microns, the specific surface area of the microsphere is 270-315 m2 / g, the pore diameter is 4-8 nanometers, and the pore volume is 0.15-0.31 cm3 / g. The preparation method comprises the following steps: firstly, synthesizing an FexOy / carbon-based composite microsphere; and then, preparing the gamma-Fe2O3 / carbon-based magnetic mesoporous composite microsphere. The invention has the following obvious advantages: the FexOy / carbon-based composite microsphere is synthesized in one step, the activation and magnetization are synchronously carried out, and the obtained material has a simplex magnetic component, is in a mesoporous structure and has a large specific surface area. The preparation method of the mesoporous carbon-based magnetic composite microsphere is simple and easy to control magnetically, can be used as a micro adsorbent or magnetic targeted drug carrier, and has potential application value in delivery and separation processes.

Description

Technical field: [0001] The invention belongs to the field of inorganic materials, in particular to a gamma-Fe 2 o 3 @Carbon-based magnetic mesoporous composite microspheres and their preparation methods. Background technique: [0002] Mesoporous materials have high pore volume storage and excellent surface condensation properties, and have important application prospects in the fields of shape-selective separation, high-efficiency catalysis, sensing, and optics, electricity, and magnetism. Mesoporous carbon has the characteristics of large specific surface area and moderate pore size distribution, and can replace activated carbon as an important material for advanced treatment of drinking water and catalyst carrier. γ-Fe 2 o 3 It has good magnetic, catalytic properties and ultraviolet absorption and shielding effects, compared with Fe 3 o 4 It has high stability and can be stored in the air for a long time. It will not affect the magnetic properties due to oxidation. ...

Claims

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Application Information

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IPC IPC(8): H01F1/01B01J13/02
Inventor 贾志刚彭宽宽诸荣孙
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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