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Method for synthesizing mesoporous ferric oxide using mesoporous carbon as hard template

A mesoporous carbon and hard template technology, applied in iron oxide/iron hydroxide and other directions, can solve the problem of low specific surface area and achieve the effect of energy saving

Inactive Publication Date: 2007-08-01
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, using mesoporous silica as a template and post-reduction method, superparamagnetic mesoporous iron oxide has been successfully obtained, but the specific surface area is relatively low (86m 2 / g)
However, the method of using mesoporous carbon as a hard template to synthesize mesoporous iron oxide with superparamagnetism has not been reported in the literature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 0.5g CMK-3 to 5ml of 0.1mol / L ferric nitrate solution, stir and impregnate for 2 hours, filter, add 10ml of 2mol / L sodium hydroxide solution and stir for 4 hours, filter and roast at 200°C in air atmosphere, Put the powder obtained after roasting into 5ml of 0.1mol / L ferric nitrate solution again and fully stir and impregnate for 1 hour, then filter, add 20ml of 0.8mol / L sodium hydroxide solution, stir for 4 hours, and roast to 350 ℃, roasted to 350 ℃ in the air atmosphere, the reddish-brown mesoporous iron oxide material can be obtained, the pore size distribution is 2-20nm, and the specific surface area is 198m 2 / g.

Embodiment 2

[0029] Add 0.5g CMK-3 to 8ml 0.5mol / L ferric nitrate solution, fully stir and impregnate for 3 hours, filter, add 20ml 2mol / L sodium hydroxide solution and stir for 3 hours, filter and roast at 250°C in air atmosphere. The powder obtained after roasting is again placed in 10ml of 0.6mol / L ferric nitrate solution, fully stirred and impregnated for 4 hours, then filtered, added with 10ml of 0.6mol / L sodium hydroxide solution, stirred for 4 hours, and roasted to 300°C in a nitrogen atmosphere Finally, roast to 350 in the air atmosphere to obtain reddish-brown mesoporous iron oxide material with a pore size distribution of 2-20nm and a specific surface area of ​​190m 2 / g.

Embodiment 3

[0031] Add 1g CMK-3 into 10ml saturated ferric nitrate solution, stir and impregnate for 2 hours, filter, add 10ml 0.5mol / L sodium hydroxide solution and stir for 4 hours, filter and roast at 275°C in air atmosphere, after roasting, get Place the powder again in 5ml of 0.1mol / L ferric nitrate solution and fully stir and impregnate for 3 hours, then filter, add 8ml of 0.4mol / L sodium hydroxide solution and stir for 4 hours, roast to 300°C in a nitrogen atmosphere, and air Calcined to 400°C in the atmosphere, the reddish-brown mesoporous iron oxide material can be obtained, the pore size distribution is 2-20nm, and the specific surface area is 200m 2 / g.

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Abstract

The invention discloses a synthesizing method of dielectric hole ferric oxide, which comprises the following steps: adopting dielectric carbon as hard mould; stirring; leaching; dissolving ferric salt into pore path of dielectric carbon; disposing through sodium hydroxide; sintering protected by nitrogen; repeating the stirring and leaching course; sintering in the air; obtaining the product.

Description

technical field [0001] The invention belongs to the technical field of inorganic porous materials, and in particular relates to a method for synthesizing ordered mesoporous iron oxide materials by using mesoporous carbon as a hard template. Background technique [0002] In 1992, Mobil scientists synthesized the M41S series of silicon-based mesoporous materials, extending the regular pore size of the material from the micropore range to the mesoporous field. Ordered mesoporous materials are a new class of materials with broad application prospects. It has broad application prospects in many research fields such as separation and purification, biological materials, catalysts for chemical synthesis and transformation, semiconductors, optical devices, computers, sensor devices, drug delivery, gas and liquid adsorption, etc. [0003] In recent years, composite materials of various metal oxides and surfactants that do not contain silicon [Tolbert H, Sieger P, Stucky GD, et al.Con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02
Inventor 单永奎王海文孔爱国李疆
Owner EAST CHINA NORMAL UNIV
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