Method for preparing carbon-hybridized nickel lithium ferrite nano-catalyst

A carbon hybrid ferric acid and nano-catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effect of simple and easy operation, large-scale industrial production, and high product purity

Inactive Publication Date: 2012-02-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are almost no relevant reports at home and abroad on how to hybridize and coat nanostructured ferrite catalysts with non-metallic carbon to further improve the effect of nanostructured ferrite catalysts on adjusting the burning rate and pressure index.

Method used

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  • Method for preparing carbon-hybridized nickel lithium ferrite nano-catalyst
  • Method for preparing carbon-hybridized nickel lithium ferrite nano-catalyst
  • Method for preparing carbon-hybridized nickel lithium ferrite nano-catalyst

Examples

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Effect test

Embodiment 1

[0023] A preparation method of carbon hybrid nickel lithium ferrite nano catalyst, it comprises the following steps:

[0024] 1) Dissolve lithium nitrate, nickel nitrate, iron nitrate and citric acid in 50mL water in a 100mL beaker at room temperature (10-30°C) and stir to prepare lithium nitrate, nickel nitrate, iron nitrate and lemon Clear solutions with acid concentrations of 2mol / L, 1mol / L, 4mol / L, and 7mol / L;

[0025] 2) Place the beaker (with a clear solution inside) in a blast drying oven at 200°C for 8 hours to obtain a foamy intermediate;

[0026] 3) Calcining the intermediate in a muffle furnace at 550°C for 3 hours to obtain lithium nickel ferrite (granular);

[0027] The XRD diffraction pattern of the obtained lithium nickel ferrite is shown in figure 1 , indicating that the obtained sample is pure nickel-lithium ferrite. Gained nickel-lithium ferrite scanning electron microscope picture is shown in figure 2 .

[0028] 4) After mixing the obtained nickel-lith...

Embodiment 2

[0032] A preparation method of carbon hybrid nickel lithium ferrite nano catalyst, it comprises the following steps:

[0033] 1) Dissolve lithium nitrate, nickel nitrate, iron nitrate and citric acid in 50mL water in a 100mL beaker at room temperature (10-30°C) and stir to make lithium nitrate, nickel nitrate, iron nitrate and lemon nitrate Clear solutions with acid concentrations of 2mol / L, 1mol / L, 4mol / L, and 7mol / L;

[0034] 2) Place the beaker (with a clear solution inside) in a blast drying oven at 160°C for 8 hours to obtain a foamy intermediate;

[0035] 3) Calcining the intermediate in a muffle furnace at 550° C. for 3 hours to obtain lithium nickel ferrite.

[0036] 4) After mixing the obtained nickel-lithium ferrite sample with glucose at a mass ratio of 2:1, add it to a polytetrafluoroethylene reactor (i.e., a high-pressure reactor), and conduct a hydrothermal reaction at 160°C for 12 hours. Washing 3 times, drying at 50° C. (drying for 8 hours) to obtain carbon h...

Embodiment 3

[0038] A preparation method of carbon hybrid nickel lithium ferrite nano catalyst, it comprises the following steps:

[0039] 1) At room temperature, in a 100mL beaker, weigh lithium nitrate, nickel nitrate, iron nitrate and citric acid and dissolve them in 50mL of water, stir and dissolve, and prepare lithium nitrate, nickel nitrate, iron nitrate and citric acid. 4mol / L, 2mol / L, 8mol / L, 14mol / L clear solution;

[0040] 2) Place the beaker in a blast oven at 200°C for 8 hours to obtain a foamy intermediate;

[0041] 3) Calcining the intermediate in a muffle furnace at 550° C. for 3 hours to obtain a lithium nickel ferrite sample.

[0042] 4) After mixing the obtained nickel-lithium ferrite sample with glucose at a mass ratio of 1:1, add it to a polytetrafluoroethylene reactor, conduct a hydrothermal reaction at 200°C for 12 hours, wash it with water and ethanol five times after taking it out, and wash it at 50°C Dry (dry for 8 hours) to obtain carbon-coated lithium nickel fe...

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Abstract

The invention relates to a method for preparing a carbon-hybridized nickel lithium ferrite nano-catalyst. The method is characterized by comprising the following steps of: (1) dissolving lithium nitrate, nickel nitrate, iron nitrate and citric acid into water in the molar ratio of 1:0.5:2:3.5, and stirring to form a settled solution; (2) making the settled solution react at the temperature of 160-200 DEG C for 6-8 hours to obtain a foamed intermediate; (3) calcining the intermediate at the temperature of 550-600 DEG C for 3 hours to obtain nickel lithium ferrite; and (4) putting the nickel lithium ferrite and glucose into a high-pressure reaction kettle in the mass ratio of 1-2:1, reacting at the temperature of 160-200 DEG C for 12 hours, washing and drying to obtain the carbon-hybridizednickel lithium ferrite nano-catalyst. The method has the advantages of easiness for operating, cheap and readily-available raw materials, low cost, high yield, no need of purification treatment, no need of large-size special equipment in the reaction process and easiness for realizing large-scale industrial production.

Description

technical field [0001] The invention relates to a preparation method of a carbon hybrid nickel-lithium ferrite catalyst. Background technique [0002] Solid propellant is the power source material of solid rocket motor, and plays a pivotal role in the development of missile and aerospace technology. Solid propellants are mainly composed of binders, oxidizers, high-energy fuels and functional additives. In the combustion process of solid propellants, the condensed phase is heated and transformed into a gas phase, on the one hand through physical evaporation and sublimation, and more mainly in the form that each component of the propellant is transformed into gaseous products through rapid thermal decomposition on the combustion surface. It is generally believed that the initial stage of the solid propellant combustion process is the thermal decomposition of propellant components (such as AP, RDX, HMX, NC / NG, etc.), and then its gaseous decomposition products undergo combusti...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J37/10C06D5/00
Inventor 郑化何宜丰黄章华聂教荣
Owner WUHAN UNIV OF TECH
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