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Method for preparing nano-porous ferric oxide powder

A technology of iron oxide powder and nanopores, which is applied in the field of excessive metal oxide porous materials, can solve the problems of difficult uniform mixing of pore-forming agents and aggregates, difficult removal of templates, and uneven distribution of pores, etc., to achieve nano-pore structure Good, low cost, high reactivity effect

Active Publication Date: 2015-04-08
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method adopts a new pore-forming agent introduction method to prepare nanoporous iron oxide powder without any template, which not only solves the problem that the pore-forming agent and aggregate are not easy to mix uniformly and the pore distribution is not easy when the traditional pore-forming agent method is used to prepare porous materials. At the same time, it overcomes the shortcomings of the template method that the template is not easy to remove and the process is complicated.

Method used

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  • Method for preparing nano-porous ferric oxide powder
  • Method for preparing nano-porous ferric oxide powder
  • Method for preparing nano-porous ferric oxide powder

Examples

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Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 0.025 moles of ferric nitrate, 0.07 moles of glycine, and 0.0375 moles of glucose (carbon source), and dissolve various raw materials in deionized water to prepare a solution; After a series of reactions such as , decomposition, etc., the precursor powder is obtained; in the air atmosphere, after the furnace temperature rises to 500°C, the precursor powder is placed in the furnace for heat treatment for 0.5h, and the nanoporous iron oxide powder is obtained.

Embodiment 2

[0028] Weigh 0.025 moles of ferric nitrate, 0.03 moles of glycine, and 0.05 moles of sucrose (carbon source), and dissolve various raw materials in deionized water to prepare a solution; After a series of reactions such as , decomposition, etc., the precursor powder is obtained; in the air atmosphere, after the furnace temperature rises to 500°C, the precursor powder is placed in the furnace and kept for 0.5h to obtain nanoporous iron oxide powder.

Embodiment 3

[0030] Weigh 0.025 moles of ferric nitrate, 0.04 moles of glycine, and 0.07 moles of maltose (carbon source), dissolve various raw materials in deionized water, and prepare a solution; place the solution on a temperature-controllable electric furnace to heat, and the solution undergoes volatilization, concentration After a series of reactions such as , decomposition, etc., the precursor powder is obtained; in the air atmosphere, when the furnace temperature rises to 600 ° C, the precursor powder is placed in the furnace for 1 hour to obtain nanoporous iron oxide powder.

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Abstract

The invention relates to a method for preparing nano-porous ferric oxide powder. The method is characterized by comprising the following steps: preparing a solution from ferric nitrate, glycine and a carbon source; introducing amorphous carbon to serve as a pore-forming material by means of redox reduction which is quickly performed in the solution, uniformly mixing carbon and an aggregate ingredient in precursor powder; properly heating, volatilizing the pore-forming material amorphous carbon into gas which escapes, and reserving pores; and crystallizing, sintering and self-assembling the aggregate ingredient to form a pore structure so as to prepare the nano-porous structure ferric oxide powder with excellent pore structure, adjustable size and uniform distribution. The method has the advantages of simple equipment, short process flow, high efficiency, low cost and environment friendliness, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of transitional metal oxide porous materials, and in particular relates to a novel pore-forming agent introduction method for preparing porous iron oxide powder with a nano-pore structure. The method has easy-to-obtain raw materials, simple equipment, short process flow and high efficiency. Low cost, suitable for industrial production. technical background [0002] Iron oxide is an important transition metal oxide inorganic material. It is non-toxic, non-polluting, environmentally friendly, and anti-ultraviolet. It is widely used as a raw material for magnetic recording materials, raw materials for ferrite preparation, polishing agents, and iron oxide pigment fuels. , printing, makeup and other fields. In recent years, nanoporous iron oxide has strong small size effect and surface effect due to its unique nanopore structure and large surface area, and has shown many special properties in elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y30/00
Inventor 秦明礼黄敏曲选辉曹知勤刘烨贾宝瑞陈鹏起吴昊阳李睿鲁慧峰
Owner UNIV OF SCI & TECH BEIJING
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