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Micro and nano alpha-Fe2O3 material and preparation method thereof

A micro-, nano-technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as complex processes, and achieve the effects of controllable size, uniform morphology and mild reaction conditions

Inactive Publication Date: 2013-12-25
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Micro and nano alpha-Fe2O3 material and preparation method thereof
  • Micro and nano alpha-Fe2O3 material and preparation method thereof
  • Micro and nano alpha-Fe2O3 material and preparation method thereof

Examples

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Embodiment 1

[0025] A kind of micronano α-Fe 2 o 3 Materials with a cylindrical one-dimensional superstructure, cylindrical micro-nano α-Fe 2 o 3 The column is 1.5-2.5 microns high and 350-450 nanometers in diameter.

[0026] A kind of micronano α-Fe 2 o 3 The preparation method of material, the step comprises:

[0027] A. Dissolve ferric chloride in water to obtain an iron salt solution, add an appropriate amount of glycerin, stir vigorously on a magnetic stirrer at room temperature for 30 minutes until the solution is evenly mixed, and then pour the mixture into the polytetrafluoroethylene in a stainless steel autoclave in the lining;

[0028] B. Raise the temperature, react at 140°C for 50 hours, cool to room temperature, wash the product with deionized water and ethanol, and dry it in vacuum at 60°C for 6 hours to constant weight to obtain the final micronano α-Fe 2 o 3 Material;

[0029] The concentration of the iron salt solution in the step A is 0.05 mol / L; the volume ratio...

Embodiment 2

[0031] A kind of micronano α-Fe 2 o 3 Materials with a cylindrical one-dimensional superstructure, cylindrical micro-nano α-Fe 2 o 3 The columns are 1.5-2 microns high and 230-400 nanometers in diameter.

[0032] A kind of micronano α-Fe 2 o 3 The preparation method of material, the step comprises:

[0033] A. Dissolve ferric nitrate in water to obtain an iron salt solution, add appropriate amount of ethylene glycol, stir vigorously on a magnetic stirrer at room temperature for 30 minutes until the solution is evenly mixed, and then pour the mixture into a polytetrafluoroethylene (PTFE) in a stainless steel autoclave Vinyl lined;

[0034]B. Raise the temperature, react at 160°C for 2 hours, cool to room temperature, wash the product with deionized water and ethanol, and dry it in vacuum at 60°C for 6h to constant weight to obtain the final micronano α-Fe 2 o 3 Material;

[0035] The concentration of the iron salt solution in the step A is 0.002 mol / L; the volume ratio...

Embodiment 3

[0037] A kind of micronano α-Fe 2 o 3 Materials with a cylindrical one-dimensional superstructure, cylindrical micro-nano α-Fe 2 o 3 The columns are 2.2-3 microns high and 300-350 nanometers in diameter.

[0038] A kind of micronano α-Fe 2 o 3 The preparation method of material, the step comprises:

[0039] A. Dissolve ferric ammonium sulfate in water to prepare iron salt solution, add appropriate amount of 1, 3-propanediol and polyvinylpyrrolidone, stir vigorously on a magnetic stirrer at room temperature for 30 minutes until the solution is evenly mixed, then pour the mixture into In the polytetrafluoroethylene lining of stainless steel autoclave;

[0040] B. Raise the temperature, react at 120°C for 30 hours, cool to room temperature, wash the product with deionized water and ethanol, and dry it in vacuum at 50°C for 8 hours to constant weight to obtain the final micronano α-Fe 2 o 3 Material;

[0041] The concentration of the iron salt solution in the step A is 0....

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Abstract

The invention relates to a micro and nano alpha-Fe2O3 material and a preparation method thereof. The micro and nano alpha-Fe2O3 material has a cylindrical one-dimensional superstructure. The preparation method comprises the steps of dissolving iron salt, mixing the dissolved iron salt with polyol, putting a mixture in a reaction kettle, reacting for 2-60 hours at the temperature of 120-180 DEG C, cooling to room temperature, cleanly washing a product by using water and ethanol, and carrying out vacuum drying on the product until the weight is constant, thereby obtaining the final micro and nano alpha-Fe2O3 material. According to the micro and nano alpha-Fe2O3 material and the preparation method thereof, the morphology of the micro and nano alpha-Fe2O3 material is controlled through the volume ratio of the soluble iron salt, water and the polyol, so that the cylindrical self-assembled one-dimensional superstructure of uniform size is obtained, and a gas sensitive element can be made from the micro and nano alpha-Fe2O3 material and is used for detecting toxic gases; the preparation method has the characteristic of mild reaction conditions, and the prepared micro and nano alpha-Fe2O3 material with the one-dimensional superstructure has the characteristics of uniform morphology and controllable size.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a micronano α-Fe 2 o 3 Materials and their preparation methods. Background technique [0002] Fe 2 o 3 As an environmentally friendly, abundant and readily available oxide, it has been used in sunlight to degrade organic pollutants in water in recent years and has become one of the research hotspots for sustainable green catalysis. Xia (Colloids and Surfaces A: Physicochem. Eng. Aspects, 2010, 1–5) synthesized α-Fe under hydrothermal conditions 2 o 3 The sheet structure, but need to use a large amount of ascorbic acid and ethanol, so the price is expensive. Zhang (J. Alloys Compds., 2011, 509, 885–890) also synthesized α-Fe by hydrothermal method 2 o 3 The sheet-like structure requires PEG-600 assistance, sodium hydroxide to adjust the pH, and subsequent annealing to obtain a single-phase α-Fe 2 o 3 flaky structure. Yang (J.Phys.Chem.B2006, 110, 11196-11198) and ...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00
Inventor 吴孔林孙健李祥子魏先文
Owner ANHUI NORMAL UNIV
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