Method for synthesizing zinc ferrite spherical nano material by premixed flame

A nanomaterial, flame synthesis technology, applied in nanotechnology, chemical instruments and methods, iron compounds, etc., can solve the problems of low crystallinity, cumbersome experimental steps, etc., achieve simple preparation steps, good reproducibility, increase The effect of specific surface area

Active Publication Date: 2021-01-08
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In order to overcome the shortcomings of the existing chemical synthesis methods, such as the low crystallinity of the product and cumbersome experimental steps, the present invention provides a method for synthesizing zinc ferrite spherical nanomaterials with a premixed flame

Method used

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  • Method for synthesizing zinc ferrite spherical nano material by premixed flame
  • Method for synthesizing zinc ferrite spherical nano material by premixed flame
  • Method for synthesizing zinc ferrite spherical nano material by premixed flame

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Embodiment 1

[0032] ZnFe 2 o 4 Preparation of Spherical Nanomaterials

[0033] 2g of Zn(NO 3 ) 2 ·6H 2 O and 8.08g of Fe(NO 3 ) 3 9H 2 O (molar ratio: 0.65:2) was added to 50 mL of deionized water, stirred and mixed evenly, placed in a magnetic stirrer at room temperature and stirred at 250 r / min for 20-30 min, and poured into an atomization device after stirring. Turn on the circulating water cooling system, check whether the water volume of the water pump is sufficient and the liquid inflow in the pipeline, so as to ensure the cooling effect of the water-cooled substrate. Set the burner preheating device and pipeline preheating heating belt at 130°C and 100°C respectively, and set the temperature of the air heating tube at 250°C to preheat the experimental device. After preheating, open the nitrogen valve, check the airtightness of the entire gas circuit, observe whether the value of the Dwyer digital display pressure gauge drops suddenly, increase the flow rate of the protective...

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Abstract

The invention discloses a method for synthesizing a zinc ferrite spherical nano material by premixed flame. According to the method, Zn(NO3)2.6H2O and Fe(NO3)3.9H2O are adopted as precursors, stable high-temperature plane flame is formed by adjusting the flow of premixed gas of carrier gas, combustible gas and oxygen and adjusting the distance between a base plate and a nozzle, the atomized precursors are brought into the formed high-temperature flame surface through the carrier gas, and finally the ZnFe2O4 spherical nano material is successfully prepared. The method has the advantages of simple operation steps, low cost, one-step rapid synthesis and good product reproducibility, the prepared product has good crystallinity and no impurity phase, the product morphology is spherical particles with uniform dispersion, the particle size is 300-400nm, and the product is assembled by a large number of small particles with a particle size of about 10nm.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a method for synthesizing zinc ferrite spherical nanomaterials with a premixed flame. Background technique [0002] Zinc ferrite (ZnFe 2 o 4 ) is a compound semiconductor material with a spinel structure. The spinel structure belongs to the face-centered cubic structure. Each unit cell is composed of 24 metal cations and 32 oxygen ions. Closely packed cubic structure with metal ions distributed in various interstitial spaces. Transition metal cation Zn in the spinel structure 2+ Added to the Fe-O lattice, due to the difference in ion size and electronegativity of Zn and Fe elements, there are a large number of oxygen vacancy defects in ZnFe 2 o 4 In the crystal lattice, this special structural characteristic makes it have good application advantages in the direction of gas sensor, and becomes a good material for detecting reducing gases. For example, nano-ZnF...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82Y40/00
CPCC01G49/00B82Y40/00C01P2004/32C01P2004/62C01P2004/64C01P2004/50C01P2004/03C01P2004/04
Inventor 郭耸陈苗苗翁哲帆程洋
Owner NANJING UNIV OF SCI & TECH
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