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A kind of subnanometer cerium oxide/bismuth ferrite/rgo composite and its preparation method and application

A composite and cerium oxide technology, which is applied in the direction of offensive equipment, non-explosive/non-thermal agent components, explosives, etc., can solve the problem of poor dispersion and structural stability of bismuth ferrite particles, which cannot meet the requirements of nano-combustion catalysts and bismuth ferrite particles. Large size and other problems, to achieve the effect of improving catalytic decomposition efficiency, ensuring dispersion and structural stability, and excellent mechanical strength

Active Publication Date: 2021-11-12
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And in the method for synthesizing bismuth ferrite graphene compound, more is to prepare bismuth ferrite first, then compound with graphene, the dispersibility and structural stability of the bismuth ferrite particle in the obtained compound like this are poor
However, in the process of preparing bismuth ferrite graphene composite materials by in-situ growth method, the obtained bismuth ferrite particle size is relatively large, and it is easy to produce more impurities, which is far from meeting the needs of nano-combustion catalysts.

Method used

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  • A kind of subnanometer cerium oxide/bismuth ferrite/rgo composite and its preparation method and application
  • A kind of subnanometer cerium oxide/bismuth ferrite/rgo composite and its preparation method and application
  • A kind of subnanometer cerium oxide/bismuth ferrite/rgo composite and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: preparing 50mL of graphene oxide aqueous solution whose concentration is 1mg / mL;

[0040] Step 2: Take by weighing 0.404g Fe(NO 3 ) 3 9H 2 O and 0.086g Ce(NO 3 ) 3 ·6H 2 O is dissolved in the graphene oxide aqueous solution, then a certain volume of absolute ethanol is added, stirred to make it evenly mixed, wherein the volume ratio of water to absolute ethanol is 10:1;

[0041] Step 3: Weigh 0.388g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 2mL of hydrochloric acid, stirred to dissolve completely, and added to the mixed solution obtained in step 2,

[0042] Step 4: Prepare 15mL of 3mol / mL KOH aqueous solution, add it to the mixed system obtained in Step 3 after cooling to room temperature, stir at room temperature for 15min, then transfer to a 100mL hydrothermal kettle, and keep at 200°C for 8h.

[0043] Step 5: The obtained product is washed 3 times with deionized water and absolute ethanol, and freeze-dried or vacuum-dried to obtain the final product CeO ...

Embodiment 2

[0046] Step 1: Prepare 40 mL of graphene oxide aqueous solution with a concentration of 1.2 mg / mL;

[0047] Step 2: Take by weighing 0.404g Fe(NO 3 ) 3 9H 2 O and 0.086g Ce(NO 3 ) 3 ·6H 2 O is dissolved in the graphene oxide aqueous solution, then add a certain volume of absolute ethanol, stir to make it mix evenly, wherein the volume ratio of water to absolute ethanol is 4:1;

[0048] Step 3: Weigh 0.485g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 2 mL of nitric acid, stirred to dissolve completely, and added to the mixed solution obtained in step 2,

[0049] Step 4: Prepare 15mL of 3mol / mL KOH aqueous solution, add it into the mixed system obtained in Step 3 after cooling to room temperature, stir at room temperature for 15min, then transfer to a 100mL hydrothermal kettle, and keep warm at 180°C for 12h.

[0050] Step 5: The obtained product is washed 3 times with deionized water and absolute ethanol, and freeze-dried or vacuum-dried to obtain the final product CeO 2 / Bi...

Embodiment 3

[0052] Step 1: preparing 50mL of graphene oxide aqueous solution whose concentration is 1mg / mL;

[0053] Step 2: Take by weighing 0.404g Fe(NO 3 ) 3 9H 2 O and 0.086g Ce(NO 3 ) 3 ·6H 2 O is dissolved in the graphene oxide aqueous solution, then add a certain volume of absolute ethanol, stir to make it evenly mixed, wherein the volume ratio of water to absolute ethanol is 5:1;

[0054] Step 3: Weigh 0.437g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 2mL of hydrochloric acid, stirred to dissolve completely, and added to the mixed solution obtained in step 2,

[0055] Step 4: Prepare 15mL of 3mol / mL KOH aqueous solution, add it into the mixed system obtained in Step 3 after cooling to room temperature, stir at room temperature for 15min, then transfer to a 100ml hydrothermal kettle, and keep warm at 210°C for 12h.

[0056] Step 5: The obtained product is washed 3 times with deionized water and absolute ethanol, and freeze-dried or vacuum-dried to obtain the final product CeO 2...

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Abstract

The invention provides a subnano cerium oxide / bismuth ferrite / rGO composite and its preparation method and application, the composite is CeO 2 / BiFeO 3 / rGO, where CeO 2 / BiFeO 3 The composite is supported on rGO, where CeO 2 / BiFeO 3 The particle size of the composite is 10 nm or less. Add cerium nitrate, iron nitrate and bismuth nitrate to graphene oxide solution, then add KOH aqueous solution, stir and mix evenly, and then carry out hydrothermal reaction to obtain subnano cerium oxide / bismuth ferrite / rGO composite. CeO of the present invention 2 / BiFeO 3 / rGO composite can reduce the sensitivity of propellant components, the constructed CeO 2 / BiFeO 3 The complex significantly increases the efficiency of decomposition of the main components of the propellant.

Description

technical field [0001] The invention is applied to the field of combustion catalysts for solid propellants, and in particular relates to a subnano-sized CeO 2 / BiFeO 3 / rGO composite and its preparation method and application. Background technique [0002] Combustion catalyst for solid propellant is an important additive used to adjust the combustion performance of propellant. It can effectively adjust the burning rate of propellant, improve the ignition performance of propellant and improve the combustion stability of propellant. Research has shown that the size of a catalyst is a key factor affecting its performance. Nanoscale catalysts have a high specific surface area, which can expose more reactive sites, thereby improving the catalytic decomposition efficiency of propellant components. [0003] Graphene has excellent mechanical, optical and thermal conductivity properties, making it widely concerned in the field of solid propellants. In addition to adjusting the bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06D5/06C06B23/00
CPCC06B23/007C06D5/06
Inventor 马海霞张婷郭兆琦庞爱民李伟
Owner NORTHWEST UNIV