A kind of hollow iron oxide material and preparation method thereof

An iron oxide, hollow technology, applied in iron oxide, chemical instruments and methods, iron oxide/iron hydroxide, etc., can solve the problems of template agent consumption, ammonia water pollution, high temperature energy consumption, etc., to achieve a short process and reduce consumption. Energy and high temperature equipment consumption, the effect of reducing consumption consumption

Active Publication Date: 2020-01-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although hollow iron oxide balls with uniform distribution of particles can be obtained, there are disadvantages such as the consumption of a large amount of silica template agent, the pollution of a large amount of ammonia water, and the high temperature and energy consumption.
Therefore, it can be seen that the synthesis of hollow iron oxide by these two methods generally requires ammonia water or sodium hydroxide alkaline conditions, and the preparation of iron oxide needs to be controlled by surfactants, and it is difficult to control corrosion by etching to obtain hollow hollows with regular shapes. Iron oxide material

Method used

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  • A kind of hollow iron oxide material and preparation method thereof
  • A kind of hollow iron oxide material and preparation method thereof
  • A kind of hollow iron oxide material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 2.433g of ferric chloride and dissolve it in 20ml of ultrapure water, add 20ml of N,N-2-methylformamide containing 1.261g of trimesic acid at the same time, then ultrasonically mix for 30min, then add 0.375-1.0ml mass fraction 68% nitric acid, then add 0.8ml of hydrofluoric acid with a mass fraction of 40% as a corrosive agent, then put it into a 60ml reactor, react at 220°C for 2 days, open the reactor to circulate alcohol and ultrapure water to the product After three washes, a red reaction product was obtained.

Embodiment 2

[0031] According to the method of embodiment 1, change wherein the hydrofluoric acid consumption of massfraction 40% that adds reduces to 0.375ml, can obtain as image 3 It can be seen that the etching degree is lower than that of the flower-shaped iron oxide in Example 1 for the flower-shaped iron oxide with moderate and slight central etching. According to Example 1, change and add 1ml of hydrofluoric acid with a mass fraction of 40%, and find that the reaction kettle cannot be opened. After sending it back to the factory to open the kettle, it can be seen that the lining has been damaged as Figure 4 As shown, the inner lining phenomenon of burning still occurred in many experiments. In order to avoid this situation, when the concentration of hydrofluoric acid is too high, the lining of the reaction kettle is made of acid and alkali resistant reinforced polymer imported from the United States. Teflon material, not ordinary PTFE material.

Embodiment 3

[0033] According to the method for embodiment 1, change the time of adding reaction wherein to be 24h, can obtain as Figure 5 Moderately lightly etched flower-like iron oxide material. Change the time of adding the reaction to 48h, you can get as Figure 5 Moderately etched microhollow iron oxide material. Change the time of the added reaction to 72h, you can get as Figure 5 Clearly etched hollow iron oxide material in .

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Abstract

The invention belongs to the technical field of material synthesis, and specifically relates to a hollow iron oxide material and a preparation method thereof. An iron salt and an organic ligand are used as raw materials, methanol, a mixed solution of methanol and water, N,N-2-methylformamide, or a mixed solution of N,N-2-methylformamide and water is used as a reaction solvent, nitric acid is usedas an oxidant, hydrofluoric acid is used as an etching agent, a reaction is performed for 12-72 h, and petal-like hollow iron oxide is obtained. The preparation method provided by the invention has the advantages of controllable etching conditions, simple process, short flow, uniform control of the product morphology and the like, and provides a promising synthesis idea for exploring synthesis ofhollow etching iron oxide.

Description

Technical field: [0001] The invention belongs to the technical field of material synthesis, and relates to a hollow iron oxide annular material formed by efficient etching and a preparation method thereof. Background technique: [0002] Nano-iron oxide is currently one of the widely studied inorganic nanomaterials. Due to its magnetic characteristics, it is widely used in magnetic recording materials, drug loading, catalytic materials, and recyclable adsorption materials and other fields. The properties of the material are closely related to its shape. Among them, the hollow iron oxide has great advantages in the fields of catalysis and adsorption due to its large specific surface area, large reaction contact area, and low material density, which is conducive to the dispersion of particles. , so the nano-iron oxide hollow morphology structure has been one of the research hotspots. [0003] At present, there are two main ways to synthesize hollow iron oxide. One is to produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00
CPCC01G49/06C01P2002/72C01P2004/03C01P2004/04C01P2004/22C01P2004/61
Inventor 王海鹰黄磊杨志辉柴立元汪鹏杨卫春唐崇俭李青竹廖骐刘恢
Owner CENT SOUTH UNIV
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