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Preparation method of nanometer trimanganese tetroxide

A technology of trimanganese tetraoxide and nanometer, which is applied in the field of materials, can solve the problem of high reaction temperature, and achieve the effect of high purity and good dispersion

Inactive Publication Date: 2012-08-08
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction temperature of the above method is high, and organic matter needs to be added to improve the dispersion of the product

Method used

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  • Preparation method of nanometer trimanganese tetroxide
  • Preparation method of nanometer trimanganese tetroxide
  • Preparation method of nanometer trimanganese tetroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Prepare 100 mL each of 0.25 mol / L manganese acetate and 0.5 mol / L sodium hydroxide solution respectively, and use a peristaltic pump to transfer 100 mL sodium hydroxide solution and 100 mL manganese acetate solution at room temperature at 1.0 mL min -1 Add it dropwise into a beaker that is constantly stirring at a high speed, continue to stir for 10 hours after the dropwise addition is completed, filter and wash with twice distilled water for 3 times, and dry the obtained solid at 80°C to obtain the product.

[0020] XRD characterization shows that this product is trimanganese tetraoxide (attached figure 1 As shown), the diffraction peaks of the sample are in good agreement with the standard card, and the diffraction intensity of the sample is relatively large and no obvious miscellaneous peaks appear, indicating that the product has high purity and good crystallinity. figure 2 The TEM of the sample shows that the sample is granular, the particle size distribution is 3...

Embodiment 2

[0022] Prepare 0.025 mol / L manganese sulfate and 0.05 mol / L ammonia solution respectively, and use a peristaltic pump to pump 100 mL of the sodium hydroxide solution and manganese sulfate solution at room temperature at 0.05 mL min -1 Add it dropwise into a beaker that is constantly stirring at a high speed, continue to stir for 5 hours after the dropwise addition is completed, filter and wash with double distilled water for 3 times, and dry the obtained solid at 80°C to obtain the product.

[0023] XRD characterization shows that this product is trimanganese tetraoxide (attached image 3 As shown), the diffraction peaks of the sample are in good agreement with the standard card, and the diffraction intensity of the sample is relatively large and no obvious miscellaneous peaks appear, indicating that the product has high purity and good crystallinity. Figure 4 TEM of the sample showed that the sample was rod-shaped with an average diameter of 21 nm and a length of 47-89 nm.

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Abstract

The invention relates to a preparation method of trimanganese tetroxide nanoparticles and nanorods. The method comprises the steps of: at room temperature, respectively using two peristaltic pumps to simultaneously dropping bivalent manganese salt solution and alkaline solution into a container in an agitating state, continuously agitating for more than 5 hours after dropping, filtering, washing and drying to obtain the trimanganese tetroxide nanoparticles or nanorods. The method has the advantages that the reaction condition is moderate, the process is simple, the cost is low, the purity of the obtained nanometer trimanganese tetroxide is high, the dispersivity is good and the particle size distribution is comparatively even.

Description

technical field [0001] The invention relates to a preparation method of trimanganese tetraoxide nanoparticles and nanorods, belonging to the technical field of materials. technical background [0002] Trimanganese tetraoxide is a black tetragonal crystal of spinel, which is widely used in the fields of catalysis, magnetic materials and electrochemistry. Its microscopic morphology has an important impact on performance. Therefore, different morphologies such as nanoparticles, nanowires, and nanocubes have been prepared, using methods such as sol-gel method, hydrothermal or solvothermal method, and template method. The simplest and most effective way to prepare trimanganese tetraoxide is to add alkaline substances and oxidants to the divalent manganese salt, or even directly use oxygen in the air as the oxidant, but it is usually difficult to obtain pure tetramanganese tetraoxide by using oxygen in the air as the oxidant. manganese oxide. [0003] The United States "Chemica...

Claims

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Application Information

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IPC IPC(8): C01G45/02B82Y40/00
Inventor 余建国刘朝阳国术坤赵永男薛旭飞
Owner TIANJIN POLYTECHNIC UNIV