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Method for producing cerium fluoride hollow nanostructured material

A technology of hollow nano and structural materials, applied in the direction of nanostructure manufacturing, chemical instruments and methods, nanotechnology, etc., to achieve the effect of low synthesis cost, controllable shape and safe operation

Inactive Publication Date: 2008-05-07
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, CeF with other morphologies 3 The synthesis of nanostructured materials (such as nano hollow spheres, etc.) is still rarely reported, and the preparation of materials is the basis of its performance and application research, so the controllable preparation of CeF 3 Nano-hollow structure materials are a significant and challenging subject

Method used

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  • Method for producing cerium fluoride hollow nanostructured material
  • Method for producing cerium fluoride hollow nanostructured material
  • Method for producing cerium fluoride hollow nanostructured material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 Preparation of CeF with hexagonal cross-section using cerium ammonium sulfate as raw material 3 Hollow nanostructured materials.

[0045] Add 29mL distilled water, 1mL concentrated sulfuric acid, 0.3g KBrO 3 , 0.4g citric acid, 0.2g NaF, 0.4g ceric ammonium sulfate, sealed in the autoclave after stirring, and placed in an oven at 160°C for 24 hours, the CeF with hexagonal cross section can be obtained 3 Hollow nanostructure materials, hollow nanostructures include hollow nanocages, nanorings or nano "cocoons", helical nanocages, etc. (Fig. 1, Fig. 4, Fig. 11). Wherein the temperature range may be 140-170° C., the reaction time may be 12-100 hours, and the amount of ammonium cerium sulfate may be 0.1-0.8 g. 0.4g oxalic acid or glucose instead of citric acid is also the same.

Embodiment 2

[0046] Example 2 Preparation of CeF with hexagonal cross-section using cerium ammonium nitrate as raw material 3 Hollow nanostructured materials.

[0047] Add 29mL distilled water, 1mL concentrated sulfuric acid, 0.3g KBrO 3 , 0.4g citric acid, 0.2g NaF, 0.4g cerium ammonium nitrate, sealed in the autoclave after stirring, and placed in an oven at 160°C for 24 hours, the CeF with hexagonal cross section can be obtained 3 Hollow nanostructured materials (see Figure 2). Wherein the temperature range may be 140-170° C., the reaction time may be 12-100 hours, and the amount of ceric ammonium nitrate may be 0.1-0.8 g. 0.3g NaBrO 3 Replace KBrO 3 The same is true.

Embodiment 3

[0048] Example 3 with K 7 Ce 6 f 31 Preparation of CeF with hexagonal cross-section as raw material 3 Hollow nanostructured materials.

[0049] K 7 Ce 6 f 31 The raw materials can be prepared at room temperature (see Figure 10), take a small beaker, add 40mL of distilled water, and then add 0.6g of potassium salt (such as KBrO 3 , KCl, KNO 3 etc.), 0.4g fluoride (such as NaF, NH 4 F, NH 4 F·HF, etc.), 0.8g cerium salt (such as cerium ammonium sulfate, cerium ammonium nitrate, etc.), stirred for 5min, aged for 10 hours, filtered, washed, and dried to obtain K 7 Ce 6 f 31 powder. Add 29mL distilled water, 1mL concentrated sulfuric acid, 0.3gKBrO 3 , 0.4g citric acid, 0.1gNaF, 0.2g K 7 Ce 6 f 31 powder, sealed in an autoclave after stirring, and placed in an oven at 160°C for 24 hours to obtain CeF with a hexagonal cross-section 3 Hollow nanostructured materials (see Figure 3). Wherein the amount of NaF can be 0-2g, K 7 Ce 6 f 31 The amount of powder can be 0...

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Abstract

A method for preparing hollow cerium fluoride nanometer structure material comprises the steps as follows: the oscillating reaction adopts potassium bromate, sodium bromate-organic acid or sugar-cerium-sulphuric acid, with the consistence of 0.06 plus or minus 0.04, 0.06 plus or minus 0.04, 0.02 plus or minus 0.02 and 0.6 plus or minus 0.4mol / L respectively; Naf is adopted as the fluorin source with consistence of 0.1 to 0.5mol / L; the preparative process of hydro-thermal reaction is performed under the temperature of 110 to 170 DEG C. The cerium source can be K7Ce6F31 powder, ammonium ceric nitrate or ceric ammonium sulfate; the organic acid or the sugar can use the organic matter such as propane diacid, oxalic acid, sucrose and glucose to replace the citric acid. The preparation of the hollow cerium fluoride nanometer structure material needs 12 to 100 hours in a high pressure kettle having polyfluortetraethylene as the lining. Furthermore, the invention prepares the hollow cerium fluoride nanometer structure materials with hexagonal or circular section respectively by controlling the temperature of the hydro-thermal reaction.

Description

technical field [0001] The invention relates to the preparation of nanometer materials and methods, especially the preparation method of cerium fluoride hollow nanostructure materials. Background technique [0002] Over the past ten years, from zero-dimensional nanodots, nanocubes, and nanoparticles to one-cone nanorods / wires, nanotubes, and nanoribbons (nanobelts), to two-dimensional nanosheets (nanosheets) and recently very popular graphene (graphene) and other nanostructures have been discovered and studied one after another. Because these nanostructured materials have small scale, large specific surface area and special exposed surface, they show special properties closely related to shape and scale, so they have good application prospects. Among these nanostructures, hollow structures such as nanocages, nanorings, hollow spheres, and nanotubes have attracted extensive research interest, because the cavities in them have bright applications in the fields of drug loading...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C01B9/08B82B3/00
Inventor 吴强胡征王喜章
Owner NANJING UNIV
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