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Preparation method of ZnO@SiO2 multi-core core-shell nanospheres

A nanosphere, core-shell technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of low total output of a single batch, high requirements for operating experience, complicated preparation process, etc. problems, to achieve good chemical sensitivity, high purity, and uniform particle size distribution

Active Publication Date: 2018-01-05
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

ZnO@SiO prepared by these methods 2 Core-shell nanospheres have good dispersion, high purity, and uniform particle distribution, but the preparation process is complicated, the operation experience is high, the total output of a single batch is low, and the final product or intermediate product is often required to be cleaned to discharge a large amount of pollutants. Waste liquid is difficult to meet the current industrial requirements for large-scale production, and is currently mostly limited to laboratory research or pilot research.

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  • Preparation method of ZnO@SiO2 multi-core core-shell nanospheres
  • Preparation method of ZnO@SiO2 multi-core core-shell nanospheres

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Experimental program
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Embodiment 1

[0029] First, weigh 500-mesh Mg powder, ferrosilicon alloy powder (TFeSi75-A), ZnSO 4 Powder, WO 3 powder, Zn powder and Fe 2 o 3 Powder, and it is evenly mixed, put into silicon carbide graphite crucible 4. Then, a heat-resistant steel plate 1 is placed 1.6 m above the silicon carbide graphite crucible 4 . Finally, on the surface of the mixed powder in the silicon carbide graphite crucible 4, spread the combustion aid 3KClO near the middle position 3 powder, and insert a magnesium strip 2 on it, such as figure 1 shown. The magnesium ribbon 2 is ignited to induce a solid state combustion reaction of the mixed raw material powder 5 . After the reaction is over, the ZnO@SiO attached to it is collected on the heat-resistant steel plate 1 2 Multicore core-shell nanospheres. The obtained nanospheres were observed by TEM, SEM and analyzed by XRD and EDS. The results showed that the obtained ZnO@SiO 2 The multi-core core-shell nanosphere only contains three elements of Zn, S...

Embodiment 2

[0031] First, weigh 200-mesh Mg powder, ferrosilicon alloy powder (TFeSi75-A), ZnSO 4 Powder, WO 3 powder, Zn powder and Fe 2 o 3 Powder, and it is evenly mixed, put into silicon carbide graphite crucible 4. Then, a heat-resistant steel plate 1 is placed 1.3 m above the silicon carbide graphite crucible 4 . Finally, on the surface of the mixed powder in the silicon carbide graphite crucible 4, spread the combustion aid 3KClO near the middle position 3 powder, and insert a magnesium strip 2 on it, such as figure 1 shown. The magnesium ribbon 2 is ignited to induce a solid state combustion reaction of the raw material powder 5 . After the reaction is over, the ZnO@SiO attached to it is collected on the heat-resistant steel plate 1 2 Multicore core-shell nanospheres. The obtained nanospheres were observed by TEM, SEM and analyzed by XRD and EDS. The results showed that the obtained ZnO@SiO 2 The multi-core core-shell nanospheres only contain three elements of Zn, Si and ...

Embodiment 3

[0033]First, weigh 100-mesh Mg powder, ferrosilicon alloy powder (TFeSi75-A), ZnSO 4 Powder, WO 3 Powder, Zn powder, and it is evenly mixed, put into silicon carbide graphite crucible 4. Then, a heat-resistant steel plate 1 is placed 1 m above the silicon carbide graphite crucible 4 . Finally, on the surface of the mixed powder in the silicon carbide graphite crucible 4, spread the combustion aid 3KClO near the middle position 3 powder, and insert a magnesium strip 2 on it, such as figure 1 shown. The magnesium ribbon 2 is ignited to induce a solid state combustion reaction of the raw material powder 5 . After the reaction is over, the ZnO@SiO attached to it is collected on the heat-resistant steel plate 1 2 Multicore core-shell nanospheres. The obtained nanospheres were observed by TEM, SEM and analyzed by XRD and EDS. The results showed that the obtained ZnO@SiO 2 The multi-core core-shell nanosphere only contains three elements of Zn, Si and O, and has high purity; t...

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Abstract

The invention belongs to the field of synthesizing and preparation of nanometer materials, and specifically relates to a preparation method of ZnO@SiO2 multi-core core-shell nanospheres. The preparation method comprises the following steps: mixing Mg powder, ferrosilicon alloy powder, ZnSO4 powder, WO3 powder, Zn powder and Fe2O3 powder according to a certain ratio, wherein the Mg powder, the ferrosilicon alloy powder, the ZnSO4 powder, the WO3 powder, the Zn powder and the Fe2O3 powder are 100-500 meshes in size; transferring the mixed powder into a silicon carbide graphite crucible, and igniting with KClO3 powder and a magnesium ribbon; and collecting the ZnO@SiO2 multi-core core-shell nanospheres which are adhered to the surface of a heat-resistant steel plate which is positioned abovethe crucible in advance after the powder in the crucible is combusted and reacted. The method applicable to the preparation of the ZnO@SiO2 multi-core core-shell nanospheres is low in requirements onequipment, high in production efficiency, simple to operate, high in total output of single batch, environmentally friendly in processing, and free from pollution; and the prepared ZnO@SiO2 multi-corecore-shell nanospheres are high in purity, outstanding in quality, and extremely high in industrial popularization value.

Description

technical field [0001] The invention belongs to the field of synthesis and preparation of nanomaterials, in particular to a ZnO@SiO 2 Preparation method of multi-core core-shell nanospheres. Background technique [0002] ZnO is an important II-VI oxide semiconductor material with wide bandgap (greater than 3.2eV), high exciton binding energy (60meV), and low threshold voltage. Nanoscale ZnO particles have many special properties due to small size effect, surface effect and macroscopic quantum tunneling effect, such as conductivity, photoluminescence, photocatalysis, wave absorption, antibacterial, etc., and have been widely used in solar cells, Gas-sensitive components, pressure-sensitive components, sewage treatment, biomedicine, coatings and many other fields. Because the chemical environment on the surface of ZnO nanoparticles has a significant impact on its performance, it is usually necessary to modify its surface before using it. nano-SiO 2 The surface has a large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02C01B33/12B82Y30/00B82Y40/00
Inventor 刘念张强万强梁方王双双
Owner HUAZHONG AGRI UNIV