Preparation method of flower shape molybdenum dioxide nano powder

A technology of nano-powder and molybdenum dioxide, which is applied in the field of preparation of flower-like molybdenum dioxide nano-powder, achieving the effects of low cost, uniform size and good monodispersity

Inactive Publication Date: 2017-10-24
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesized MoO 2 Most of them are one-dimensional rods, and there

Method used

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  • Preparation method of flower shape molybdenum dioxide nano powder
  • Preparation method of flower shape molybdenum dioxide nano powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A flower-like MoO 2 The preparation method of nanopowder, comprises the steps:

[0022] Add 3M molybdenum powder to a clean 100mL beaker, then add 2.0mL of H 2 O, until the dispersion is uniform, add 2.0mL of H 2 o 2 , after the reaction is finished, seal it with plastic wrap, and let it stand overnight for 24 hours. Then add the molybdic acid precursor solution obtained above to 20mL of absolute ethanol, stir evenly, transfer to 50mL polytetrafluoroethylene liner, and put it into a 50mL stainless steel jacket, and conduct a hydrothermal reaction at 180°C for 8h. Then it was naturally cooled to room temperature, the obtained product was centrifuged and washed several times with water and absolute ethanol, and the obtained sample was dried at 60° C. for 12 hours.

Embodiment 2

[0024] Add 3M molybdenum powder to a clean 100mL beaker, then add 2.0mL of H 2 O, until the dispersion is uniform, add 1.0mL of H 2 o 2 , after the reaction is finished, seal it with plastic wrap, and let it stand overnight for 24 hours. Then add 8 mL of absolute ethanol to the molybdic acid precursor solution obtained above, stir evenly, transfer to 50 mL polytetrafluoroethylene lining, and put it into a 50 mL stainless steel jacket, and conduct a hydrothermal reaction at 180°C for 8 hours. Then it was naturally cooled to room temperature, the obtained product was centrifuged and washed several times with water and absolute ethanol, and the obtained sample was dried overnight at 60°C.

Embodiment 3

[0026] Add 3M molybdenum powder (550nm) to a clean 100mL beaker, then add 2.0mL of H 2 O, until the dispersion is uniform, add 1.0mL of H 2 o 2 , after the reaction is finished, seal it with plastic wrap, and let it stand overnight for 24 hours. Then add the molybdic acid precursor solution obtained above to 20mL of absolute ethanol, stir evenly, transfer to 50mL polytetrafluoroethylene liner, and put it into a 50mL stainless steel jacket, and conduct a hydrothermal reaction at 180°C for 8h. Then it was naturally cooled to room temperature, the obtained product was centrifuged and washed several times with water and absolute ethanol, and the obtained sample was dried at 60° C. for 12 hours.

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Abstract

The invention discloses a preparation method of flower-shaped molybdenum dioxide nanometer powder, which uses hydrogen peroxide to directly oxidize and dissolve molybdenum powder to prepare a molybdenum acid precursor, and then uses a hydrothermal method to prepare flower-shaped nanometer MoO2 particles in situ in one step. The obtained nano-MoO2 particles with good monodispersity have a unique shape, and are flower-shaped nano-MoO2 particles self-assembled by basic structural units of several nanometers. It improves the single-dimensional, easy to agglomerate, and large-size structural shortcomings of general nano-MoO2, and better reflects the superior optical properties of nano-materials, thereby optimizing the overall performance of the material, especially the photocatalytic performance.

Description

technical field [0001] The invention relates to a photocatalytic material and a preparation method thereof, in particular to a flower-shaped molybdenum dioxide (MoO2) with good monodispersity. 2 ) The preparation method of nanopowder. Background technique [0002] Semiconductor material is an important photocatalyst, which has shown outstanding potential and great commercial value in the utilization of sunlight. Therefore, it has received extensive attention from researchers. As a typical transition metal oxide, molybdenum oxide has rich chemical valence states, which makes its application fields diversified and important. where MoO 2 It has good electrical conductivity different from ordinary oxides, it is different from MoO 3 Mo in 6+ , Mo 6+ The free electrons of MoO are bound by the surrounding coordinated O, while MoO 2 The higher density of free electrons in the valence band increases the Mo 4+ The catalytic activity of MoO 2 It shows good catalytic performanc...

Claims

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Application Information

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IPC IPC(8): C01G39/02B82Y30/00B01J23/28
CPCC01G39/02B01J23/28B01J35/004B82Y30/00C01P2002/72C01P2004/04C01P2004/30C01P2004/64
Inventor 梁淑华苟旭丰孙少东邹军涛肖鹏
Owner XIAN UNIV OF TECH
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