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Method for preparing beta-FeOOH nano granule suspension solution

A nanoparticle and suspension technology, applied in the direction of iron oxide/hydroxide, etc., can solve the problems of industrialization difficulties, high reactant prices, etc., and achieve the effect of broad market prospects, small particles, and less production equipment

Inactive Publication Date: 2009-05-06
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the biggest problem it is currently facing is the high price of the reactants used (such as metal carbonyl complexes, etc.), and the need to add stabilizers
Therefore, it is difficult to realize the industrialization of the above two preparation methods at present.

Method used

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  • Method for preparing beta-FeOOH nano granule suspension solution
  • Method for preparing beta-FeOOH nano granule suspension solution
  • Method for preparing beta-FeOOH nano granule suspension solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. According to the mass ratio of 6:1, respectively weigh 0.2021g (0.750mmol) of ferric chloride containing six crystal waters and 0.0074g (0.125mmol) of urea, and dissolve them in 50ml double distilled water at the same time.

[0023] 2. Add the above solution into a hydrothermal kettle equipped with a polytetrafluoroethylene liner, react at 80°C for 5 hours, stop heating, and let it cool down to room temperature naturally. A stable suspension of β-FeOOH nanoparticles was obtained.

[0024] Such as figure 1 , figure 2 with image 3 shown. Photographs of the suspension were taken with a Canon 610 digital camera. The structure and phase identification of the product adopt German Bruker AXS D8 ADVANCE X-ray powder diffractometer (XRD, Cu K α Radiation, λ=1.54056 , 40kV, 200mA) for measurement. The morphology and particle size of the product were observed by JEM-2000EX transmission electron microscope.

[0025] The results showed that:

[0026] figure 1 : the u...

Embodiment 2

[0030] 1. According to the material ratio of 6:1, weigh 0.4042g of ferric chloride containing six crystal waters and 0.0148g (0.250mmol) of urea respectively, and dissolve them in 50ml of double distilled water at the same time.

[0031] 2. Add the above solution into a hydrothermal kettle equipped with a polytetrafluoroethylene liner, react at 80°C for 5 hours, stop heating, and let it cool down to room temperature naturally. A stable suspension of β-FeOOH nanoparticles was obtained.

[0032] Such as figure 2 , Figure 4 with Figure 5 shown. Photographs of the suspension were taken with a Canon 610 digital camera. The structure and phase identification of the product adopt German Bruker AXS D8 ADVANCE X-ray powder diffractometer (XRD, Cu K α Radiation, λ=1.54056 , 40kV, 200mA) for measurement. The morphology and particle size of the product were observed by JEM-2000EX transmission electron microscope.

[0033] The results showed that:

[0034] Figure 4 : the uni...

Embodiment 3

[0038] 1. According to the mass ratio of 6:1, respectively weigh 0.6063g (2.250mmol) of ferric chloride containing six crystal waters and 0.0222g (0.375mmol) of urea, and dissolve them in 50ml double distilled water at the same time.

[0039] 2. Add the above solution into a hydrothermal kettle equipped with a polytetrafluoroethylene liner, react at 80°C for 5 hours, turn off the power, stop heating, and let it cool down to room temperature naturally. A stable suspension of β-FeOOH nanoparticles was obtained.

[0040] Such as figure 2 , Image 6 with Figure 7 shown. Photographs of the suspension were taken with a Canon 610 digital camera. The structure and phase identification of the product adopt German Bruker AXS D8ADVANCE X-ray powder diffractometer (XRD, Cu K α Radiation, λ=1.54056 , 40kV, 200mA) for measurement. The morphology and particle size of the product were observed by JEM-2000EX transmission electron microscope.

[0041] The results showed that:

[004...

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Abstract

The invention discloses a Beta-FeOOH nanoparticle suspension preparation method, relating to a preparation method of an enhanced heat transfer medium, in particular to a stable Beta-FeOOH nanoparticle suspension. The method comprises the steps as follows: firstly, the aqueous solution of ferric trichloride and urea is prepared, wherein, the mass ratio of the ferric trichloride and the urea is 6:1; and then the aqueous solution is added into an airtight PTFE reactor, reacted at the temperature of 80 plus or minus 2 DEG C till the end, and naturally cooled to room temperature, so that the Beta-FeOOH nanoparticle suspension is obtained. The method adds no stabilizing agent, and the produced Beta-FeOOH is small in size and good in uniformity and stability. The method has the advantages of small number of production equipment, simple operating steps, low cost, and requires no additives except raw materials, thus being suitable for industrial production.

Description

technical field [0001] The invention relates to an enhanced heat transfer medium, in particular to a method for preparing a stable β-FeOOH nano particle suspension. Background technique [0002] Nanoparticle suspension refers to dispersing metal or non-metallic nanoparticles into traditional heat exchange media such as water, alcohol, oil, etc., to prepare a new heat exchange medium with uniform, stable and high thermal conductivity. Adding nanoparticles to the fluid can significantly improve the thermal conductivity of the liquid and the heat transfer performance of the heat exchange system. It shows that the nanoparticle suspension has broad application prospects in the field of enhanced heat transfer. [0003] With the development of science and technology and the increasingly prominent energy problems, the heat transfer load and heat transfer intensity of heat exchange equipment are increasing day by day, and the size limit and use environment of heat exchange equipment...

Claims

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Application Information

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IPC IPC(8): C01G49/02
Inventor 南照东张平平魏成振
Owner YANGZHOU UNIV
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