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Method for preparing holmium oxide nano materials with different morphologies

A nanomaterial, a technology of holmium oxide, applied in the field of preparing holmium oxide nanomaterials, can solve the problems of complex synthesis steps, high difficulty, inability to synthesize nanotube morphology and three-dimensional structure holmium oxide nanomaterials, and achieve excellent performance and stable structure , the effect of excellent humidity sensitive performance

Active Publication Date: 2020-06-19
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to solve the problem that the existing method for preparing holmium oxide nanomaterials cannot realize the regulation and control of the morphology of holmium oxide nanomaterials through the adjustment of reactants. Holmium nanomaterials, the prepared holmium oxide nanosheets are thicker in size and have no porous structure on the surface, and provide a method for preparing holmium oxide nanomaterials with different shapes

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  • Method for preparing holmium oxide nano materials with different morphologies
  • Method for preparing holmium oxide nano materials with different morphologies
  • Method for preparing holmium oxide nano materials with different morphologies

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specific Embodiment approach 1

[0038] Specific embodiment one: a kind of method for preparing holmium oxide nanomaterials with different shapes described in this embodiment, it is carried out according to the following steps:

[0039] 1. Dissolve holmium acetylacetonate and urea in the solvent, and magnetically stir for 0.5h to 2h to obtain a uniformly stirred solution;

[0040] The molar ratio of described holmium acetylacetonate and urea is 1:(0.5~6); The volume ratio of the total moles of described holmium acetylacetonate and urea to solvent is 1mmol:(4~13)mL; The described Solvent is made up of ethylene glycol, polyethylene glycol 400 and deionized water; The volume ratio of described ethylene glycol and polyethylene glycol 400 is 1:(0.9~1.1); Described ethylene glycol and deionized The volume ratio of water is 1:(0.15~0.7);

[0041] 2. Place the uniformly stirred solution in a polytetrafluoroethylene-lined stainless steel reaction kettle and seal it, and react for 8h to 16h at a temperature of 140°C t...

specific Embodiment approach 2

[0047] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the holmium oxide nanomaterials prepared in step 2 have nanotubes, spheres formed by self-assembly of nanotubes, nanosheets, or spheres formed by self-assembly of nanosheets. . Others are the same as in the first embodiment.

specific Embodiment approach 3

[0048] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step two, the light yellow precipitate is washed and then dried according to the following steps: wash several times with deionized water and ethanol respectively, and then Under the condition that the temperature is 70°C-100°C, vacuum dry for 5h-12h. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing holmium oxide nano materials with different morphologies, relates to a method for preparing holmium oxide nano materials, and aims at solving the problems that the existing preparation method of the holmium oxide nano material cannot adjust reactants to realize regulation and control on the morphology of the holmium oxide nanomaterial, the synthesis steps are complex and high in difficulty, the nanotube morphology and the three-dimensional structure holmium oxide nanomaterial cannot be synthesized, and the prepared holmium oxide nanosheet is relatively thick in size and has no porous structure on the surface. The method comprises the following steps: 1, dissolving holmium acetylacetonate and urea in a solvent to obtain a uniformly stirred solution; and 2, carrying out a sealed reaction on the uniformly stirred solution, naturally cooling to room temperature, carrying out centrifugal separation to obtain a faint yellow precipitate, washingthe faint yellow precipitate, drying to obtain a holmium oxide nano-material precursor, and calcining the holmium oxide nano-material precursor under an air condition to obtain the holmium oxide nano-material. The method is used for preparing holmium oxide nano materials with different morphologies.

Description

technical field [0001] The invention relates to a method for preparing holmium oxide nanometer material. Background technique [0002] Holmium oxide (Ho 2 o 3 ) is one of the strongest paramagnetic substances known at present. Because there are a series of sharp peaks in the visible absorption spectrum of glass and solution containing holmium oxide, it is often used as a calibration standard for spectrophotometers. At the same time, it is also It can be used to prepare special colored glass. In recent years, holmium oxide has been gradually applied to the fields of optics and electronics. Therefore, it is very important to prepare holmium oxide nanomaterials with different shapes and controllable adjustment of the shape. At present, the morphology of synthetic holmium oxide nanomaterials mainly includes nanoparticles, nanocrystals, nanofilms, nanowires, nanosheets, etc., and the synthesis method is mainly based on hydrothermal reaction. The morphology of nanomaterials pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/224B82Y40/00G01N27/12
CPCB82Y40/00G01N27/121C01P2004/24C01P2004/64C01P2004/13C01P2004/32
Inventor 徐英明郭传宇程晓丽霍丽华张现发
Owner HEILONGJIANG UNIV
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