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Method for solvothermal-method synthesis of zinc oxide nano particle assembly assisted by nitrogen-contained organic micromolecule ligand

A zinc oxide nano- and small-molecule ligand technology, which is applied in the field of synthesis of zinc oxide nano-materials, can solve the problems of difficulty in constructing spherical structures, low production efficiency, poor controllability, etc., and achieve good application value, strong absorption, and low cost effect

Inactive Publication Date: 2012-07-25
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thermal evaporation method requires complex instruments and many influencing factors, such as the type of raw material, evaporation temperature, collection temperature, presence or absence of catalyst and the type of catalyst, pressure and carrier gas, etc., resulting in poor controllability and low production efficiency; while template-assisted water The thermal method requires complex synthesis processes, templates must be introduced, and it is difficult to construct special spherical structures

Method used

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  • Method for solvothermal-method synthesis of zinc oxide nano particle assembly assisted by nitrogen-contained organic micromolecule ligand
  • Method for solvothermal-method synthesis of zinc oxide nano particle assembly assisted by nitrogen-contained organic micromolecule ligand
  • Method for solvothermal-method synthesis of zinc oxide nano particle assembly assisted by nitrogen-contained organic micromolecule ligand

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Experimental program
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Effect test

Embodiment 1

[0035] Accurately weigh Zn(Ac) 2 ?2H 2 O (0.5 mmol), NaOH (0.1 mmol), tttmb (0.1 mmol) and m -bitmb (0.1 mmol) in a 10ml reaction kettle, add 5ml methanol, 5ml ethanol, keep the temperature at 65°C for 3 days, then cool to room temperature naturally, wash the product with ethanol 3-5 times, and dry it in vacuum to obtain white zinc oxide.

[0036] From the TEM and SEM images in Figure 2, it can be seen that the synthesized zinc oxide nanoparticles are monodisperse hollow spheres with a diameter ranging from 320-440nm, and are assembled from nanoparticles, and the length of each small nanoparticle is about It is 30nm.

Embodiment 2

[0038] The synthetic method of nano-zinc oxide is substantially the same as in Example 1, except that the ratio of the added sample is different: adding Zn(Ac) 2 ?2H 2 O (0.2 mmol), tttmb (0.2 mmol), m-bitmb (0.2 mmol), NaOH (0.4 mmol).

[0039] It can be seen from the TEM and SEM images in Figure 3 that zinc oxide solid nanospheres were synthesized, and nanorods of different lengths and widths grew on the periphery of the nanospheres, and the diameter of the solid spheres ranged from 140-230nm. As the concentration of m-bitmb increases, the size of the nanorods also tends to be uniform.

Embodiment 3

[0041] The synthesis method of nano-zinc oxide is basically the same as that of Example 1, except that the ratio of the solvent added is different: 6 ml of methanol and 2 ml of ethanol are added.

[0042] It can be seen from the TEM and SEM images in Figure 4 that the synthesized nanospheres are composed of hexagonal sheets, the hexagonal sheets are smooth, the side length is about 100nm, and the diameter of the nanospheres is 550-780nm.

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Abstract

The invention discloses a method for solvothermal-method synthesis of a zinc oxide nano particle assembly assisted by nitrogen-contained organic micromolecule ligand. Methyl alcohol and ethanol are mixed solvent, and tttmb and m-bitmb serve as ligands; Zn(Ac)2 and NaOH are added into a reaction kettle to directly react for 3 days at the temperature of 65-200DEG C or after the pH (Potential Of Hydrogen) is regulated to 8; and after the mixture is lowered to the room temperature, a product is cleaned and dried in vacuum to obtain product nanometer zinc oxide. With the method, the ratio, the reaction temperature and the pH of a reactant can be regulated to obtain the zinc oxide nano particle assemblies of different appearances. The method for solvothermal-method synthesis of the zinc oxide nano particle assembly assisted by the nitrogen-contained organic micromolecule ligand has the characteristics that the nanometer zinc oxide with the special appearance structure can be controllably synthesized, and the method has a low price, is convenient to operate and is easy to control. The nanometer zinc oxide synthesized with the method has strong adsorption in the near-infrared and has a favorable application value.

Description

technical field [0001] The invention relates to a method for synthesizing zinc oxide nanometer materials, in particular to a method for preparing a nitrogen-containing organic small molecule ligand-assisted solvothermal zinc oxide nanoparticle assembly. Background technique [0002] Zinc oxide (ZnO), as a new type of inorganic chemical material, is widely used in the fields of rubber, dyes, inks, coatings, glass, piezoelectric ceramics, optoelectronics and daily chemicals. Nanoscale zinc oxide materials further improve the electrical and optical properties of zinc oxide. For example, the high specific surface area and small size of nanostructures can improve the luminescent frequency and chemical sensitivity of zinc oxide. Due to the quantum confinement effect, the concentration of excitons in the zinc oxide (ZnO) nanostructure increases, and the luminous intensity will be further enhanced. Excellent material properties make zinc oxide nanomaterials a research hotspot in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y40/00
Inventor 刘红科韩敏刘冬菊方敏孙海霞
Owner NANJING NORMAL UNIVERSITY
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