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Method for Synthesizing Zinc Ferrite Spherical Nanomaterials with Premixed Flame

A nanomaterial, flame synthesis technology, applied in nanotechnology, chemical instruments and methods, iron compounds, etc., can solve the problems of cumbersome experimental steps and low crystallinity, and achieve single product, simple preparation steps, and good reproducibility. Effect

Active Publication Date: 2022-03-15
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 Nanomaterials with Premixed Flame
  • Method for Synthesizing Zinc Ferrite Spherical Nanomaterials with Premixed Flame
  • Method for Synthesizing Zinc Ferrite Spherical Nanomaterials with 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 zinc ferrite spherical nanometer materials with a premixed flame. The method uses Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O is used as a precursor to form a stable high-temperature flat flame by adjusting the flow rate of carrier gas, combustible gas, and oxygen premixed gas and adjusting the distance between the substrate and the nozzle. The carrier gas is used to bring the atomized precursor into the formed high-temperature flame surface. Finally successfully prepared ZnFe 2 o 4 spherical nanomaterials. The invention has simple operation steps, low cost, one-step rapid synthesis, good product reproducibility, good crystallinity and no impurity phase in the prepared product, and the appearance of the product is uniformly dispersed spherical particles with a particle size of 300-400nm , assembled from a large number of small particles with a particle size of about 10 nm.

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 Patents(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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