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Nano ferric hydroxide and preparation method thereof

A kind of iron oxyhydroxide and nanotechnology, applied in the field of nano iron oxyhydroxide and its preparation, can solve the problems of unfavorable final product commercial application, unfavorable organic matter adsorption and decomposition, high temperature and time, etc., achieve excellent photocatalytic performance, raw material Inexpensive, agglomeration-preventing effect

Inactive Publication Date: 2013-06-26
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter it is iron oxyhydroxide or its preparation method, there are deficiencies. First, the size of the final product—rod-shaped nano-iron oxyhydroxide is relatively small, and the rod-shaped shape makes it easier to agglomerate, which is extremely unfavorable for the production of It is used for the adsorption and decomposition of organic matter; secondly, the price of the raw material hydrogen peroxide used in the preparation method is relatively high, and the temperature and time during the reaction are also too high and too long, which makes it difficult to reduce the production cost and is not conducive to the commercialization of the final product application

Method used

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  • Nano ferric hydroxide and preparation method thereof
  • Nano ferric hydroxide and preparation method thereof
  • Nano ferric hydroxide and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] The concrete steps of preparation are:

[0027] Step 1, first mix ethylene glycol and deionized water according to the volume ratio of 0.8:1.2, and then sonicate for 5 minutes to obtain an aqueous solution of ethylene glycol. Add ferrous sulfate in the aqueous ethylene glycol solution for ultrasonication for 5 minutes according to the weight ratio of 1.8:90 to obtain a ferrous sulfate mixture; add urea into the aqueous glycol solution for ultrasonication for 5 minutes according to the ratio of 1.3:30 for the weight ratio , to obtain the urea mixture.

[0028] Step 2: first inject the urea mixed solution at a rate of 0.8ml / min into the stirred ferrous sulfate mixed solution at a temperature of 90° C. according to the volume ratio of 0.8:3 to obtain a reaction solution. Inject air into the reaction solution for 3h at a rate of 2.5ml / min to obtain a mixture similar to figure 1 and figure 2 shown, and as image 3 , Figure 4 and Figure 5 The nanometer iron oxyhydrox...

Embodiment 2

[0030] The concrete steps of preparation are:

[0031] Step 1, first mix ethylene glycol and deionized water according to the volume ratio of 0.9:1.1, and then sonicate for 6 minutes to obtain an aqueous solution of ethylene glycol. Add ferrous sulfate to ethylene glycol aqueous solution and ultrasonicate for 6 minutes according to the ratio of 1.9:90 by weight to obtain a ferrous sulfate mixture; add urea to ethylene glycol aqueous solution for 6 minutes according to the ratio of 1.4:30 by weight , to obtain a urea mixture.

[0032] Step 2: first inject the urea mixed solution at a rate of 0.9 ml / min into the stirred ferrous sulfate mixed solution at a temperature of 91° C. according to the volume ratio of 0.9:3 to obtain a reaction solution. Then inject air into the reaction solution for 2.8h at a rate of 2.8ml / min to obtain a mixture similar to figure 1 and figure 2 shown, and as image 3 , Figure 4 and Figure 5 The nanometer iron oxyhydroxide shown in the curve. ...

Embodiment 3

[0034] The concrete steps of preparation are:

[0035] Step 1, first mix ethylene glycol and deionized water according to the volume ratio of 1:1, and then sonicate for 7 minutes to obtain an aqueous solution of ethylene glycol. Then add ferrous sulfate into the aqueous ethylene glycol solution and ultrasonicate for 7 minutes according to the ratio of 2:90 by weight to obtain a ferrous sulfate mixture; add urea into the aqueous glycol solution and ultrasonicate for 7 minutes according to the ratio of 1.5:30 by weight , to obtain the urea mixture.

[0036] Step 2: first inject the urea mixed solution into the stirred ferrous sulfate mixed solution at a temperature of 93° C. at a rate of 1 ml / min according to a volume ratio of 1:3 to obtain a reaction solution. Inject air at a rate of 3ml / min for 2.5h into the reaction solution to obtain the following figure 1 and figure 2 shown, and as image 3 , Figure 4 and Figure 5 The nanometer iron oxyhydroxide shown in the curve....

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Abstract

The invention discloses nano ferric hydroxide and a preparation method thereof. The shape of nano ferric hydroxide is a nano-sheet cluster, wherein the cluster diameter of the nano-sheet cluster is between 400 and 500nm, and the sheet length of nano-sheets forming the nano-sheet cluster is between 200 and 250nm, and the sheet width is between 20 and 25nm, and the sheet thickness is between 2 and 5nm; the nano-sheet cluster is formed by orthorhombic system alpha-ferric hydroxide, and the specific surface area of the nitrogen adsorption and desorption representation is between 100 and 105m<2> / g. The method comprises the following steps of: mixing ethylene glycol and deionized water, and performing ultrasonic to prepare ethylene glycol aqueous solution; respectively adding ferrous sulfate into the ethylene glycol aqueous solution, and performing ultrasonic to obtain ferrous sulfate mixed solution; adding urea into ethylene glycol aqueous solution, and performing ultrasonic to obtain urea mixed solution; injecting the urea mixed solution into the stirring ferrous sulfate mixed solution at a speed of 0.8-1.2ml / min according to a volume ratio of (0.8-1.2):3 to prepare a reaction solution; and injecting air into the reaction solution at a speed of 2.5- 3.5ml / min to prepare the target product. The nano ferric hydroxide can be widely applied to adsorption and photocatalytic decomposition of organic matters.

Description

technical field [0001] The invention relates to an iron oxide and a preparation method thereof, in particular to a nanometer iron oxyhydroxide and a preparation method thereof. Background technique [0002] Iron oxyhydroxide (α-FeOOH) is a hydrous iron oxide mineral, which has the characteristics of dense surface hydroxyl groups, cheap and easy to obtain, certain adsorption capacity for organic matter and good decomposition effect. Nano-iron oxyhydroxide has attracted more and more attention due to its large specific surface area and excellent properties in many aspects. Recently, people have made unremitting efforts in order to obtain nano-iron oxyhydroxide, such as in "catalytic ozonation degradation of phenol by mesoporous α-FeOOH" (Journal of Inorganic Chemistry, Vol. 25, No. 9, September 2009 Month, Cao Yuming, etc.) a paper 1595 ~ 1600 pages discloses a ferric oxyhydroxide and its preparation method. The shape of the iron oxyhydroxide mentioned in this article is nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/02B82Y40/00
Inventor 康升红汪国忠方明刘毛王慧敏邓泉
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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