CN115849996A - Potassium-doped maghemite-coupled graphene composite combustion catalyst, and preparation method and application thereof - Google Patents
Potassium-doped maghemite-coupled graphene composite combustion catalyst, and preparation method and application thereof Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 61
- 239000003054 catalyst Substances 0.000 title claims abstract description 55
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 47
- 239000002131 composite material Substances 0.000 title claims abstract description 32
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000003380 propellant Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical group [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 38
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229910052700 potassium Inorganic materials 0.000 claims description 12
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 11
- 239000011591 potassium Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000002243 precursor Substances 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 10
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 8
- 239000004449 solid propellant Substances 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000012716 precipitator Substances 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 4
- 239000012046 mixed solvent Substances 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 239000000028 HMX Substances 0.000 abstract description 11
- UZGLIIJVICEWHF-UHFFFAOYSA-N octogen Chemical group [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)CN([N+]([O-])=O)C1 UZGLIIJVICEWHF-UHFFFAOYSA-N 0.000 abstract description 11
- 238000000354 decomposition reaction Methods 0.000 abstract description 9
- 230000003197 catalytic effect Effects 0.000 abstract description 7
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- 239000003153 chemical reaction reagent Substances 0.000 abstract description 3
- 229910001566 austenite Inorganic materials 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 abstract description 2
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- 238000003756 stirring Methods 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 239000011259 mixed solution Substances 0.000 description 5
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 4
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- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
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- 238000001228 spectrum Methods 0.000 description 2
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
- 229940090898 Desensitizer Drugs 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
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- 239000003063 flame retardant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
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Abstract
The invention discloses a potassium-doped maghemite-coupled graphene composite combustion catalyst, a preparation method and application thereof. In one aspect, K is doped with gamma-Fe 2 O 3 The catalyst has excellent catalytic activity for exothermic decomposition of the octogen; on the other hand, K-Fe is generated by an in-situ growth process 2 O 3 Uniformly and stably attached to the surface of the graphene. The invention adopts conventional reagents, does not need to add any surfactant, has simple process and easily obtained raw materials, and can be prepared in batches. The catalyst can reduce the sensitivity of the propellant components and obviously improve the decomposition efficiency of the main components of the propellant.
Description
Technical Field
The invention is applied to the field of combustion catalysts for solid propellants, and particularly relates to a potassium-doped maghemite-coupled graphene composite combustion catalyst, and a preparation method and application thereof.
Background
As an important component of national defense technology systems, weaponry is required to have the characteristics of high specific impulse, high density, high combustion rate and the like, and a combustion catalyst is one of essential key components. Therefore, the development of a novel high-efficiency combustion catalyst is of great significance for improving the ignition combustion performance of the propellant. The graphene carbon material can be used as a cocatalyst in a solid propellant and can be compounded with a nano metal oxide catalyst for use. The large specific surface area and the excellent heat conductivity of the nano catalyst provide a good material basis for improving the dispersibility and the catalytic activity of the nano catalyst. And by virtue of the super-strong mechanical strength of the energy-containing material, when the energy-containing material is compounded with graphene for use, the graphene can play roles of a desensitizer, a toughening agent and the like. In addition, the compound is also mixed with a small amount of potassium, and reports show that the potassium salt can inhibit the secondary combustion of the solid propellant and can be applied to low-characteristic signal propellants. However, the traditional combustion catalyst has the defects of low activity, single function and over-adding of no energy-containing auxiliary agent which tends to reduce the overall energy density of the propellant.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a potassium-doped maghemite-coupled graphene composite combustion catalyst, a preparation method and application thereof, wherein the composite catalyst is prepared by gamma-Fe 2 O 3 The three components of graphene and potassium are in complementary synergistic effect, so that the composite catalyst has three effects of catalysis, sense reduction and flame suppression.
The invention is realized by the following technical scheme:
a potassium-doped maghemite-coupled graphene composite combustion catalyst is prepared by dissolving graphene oxide, a metal salt precursor and a potassium-containing precipitator in a mixed solvent of ethylene glycol and water, and carrying out hydrothermal reaction to obtain the potassium-doped maghemite-coupled graphene composite combustion catalyst.
Further, the metal salt precursor is Fe (NO) 3 ·9H 2 O。
Further, the precipitator is potassium hydroxide.
Further, the solvent is a mixed solvent of water and glycol in a volume ratio of 1.
Further, the mass ratio of the graphene oxide to the metal salt precursor is 0.04-0.1: 1.
further, the mass ratio of the graphene oxide to the potassium-containing precipitator is 0.01-0.025: 1.
furthermore, the dosage ratio of the graphene oxide to the solvent is 10-25 mg:15mL.
Furthermore, the temperature of the hydrothermal reaction is 150-160 ℃ and the time is 10-12 h.
The potassium-doped maghemite-coupled graphene composite combustion catalyst prepared by the method is characterized in that the crystal form of iron oxide in the catalyst is gamma-shaped, the micro-morphology of the catalyst is in a flower cluster shape, and the catalyst is doped with potassium element.
The potassium-doped maghemite-coupled graphene composite combustion catalyst prepared by the method is used as a combustion catalyst for a propellant, and is applied to catalyzing the combustion of a solid propellant.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the preparation method, graphene oxide, a metal salt precursor and a potassium-containing precipitator are used as raw materials, and a potassium-doped maghemite coupled graphene composite combustion catalyst is prepared through a hydrothermal reaction; the catalyst is K-Fe 2 O 3 a/G complex. In one aspect, K-Fe 2 O 3 The catalyst has excellent catalytic activity for exothermic decomposition of the octogen; on the other hand, K-Fe is generated by an in-situ growth process 2 O 3 Uniformly and stably attached to the surface of the graphene. The invention adopts conventional reagents, does not need to add any surfactant, has simple process and easily obtained raw materials, and can be prepared in batches.
The potassium-doped maghemite-coupled graphene composite combustion catalyst can be used as a combustion catalyst for a solid propellant. The potassium in the compound can inhibit CO and H in gas discharged from rocket engine nozzle during propellant combustion 2 And the secondary combustion with oxygen reduces the harm. The catalyst can obviously improve the exothermic decomposition rate of the main component of the energetic material, namely the octogen, and can be used for combustion in a solid propellantThe catalyst field has application prospect.
Drawings
Figure 1 is an XRD pattern of the products of comparative example 1, comparative example 2, example 1, and example 2.
FIG. 2 shows K-Fe prepared in comparative example 1 2 O 3 A TEM image of (a).
FIG. 3 shows K-Fe prepared in example 1 2 O 3 TEM image of/G-1.
FIG. 4 shows K-Fe prepared in comparative example 1 2 O 3 XPS survey spectrum of (1).
FIG. 5 shows K-Fe 2 O 3 And K-Fe 2 O 3 Heat flow profile of HMX under the effect of/G.
Detailed Description
The present invention is illustrated by way of specific examples, but is not limited thereto. The graphene oxide is prepared by a hummer method. The remaining reagents and materials are commercially available.
According to the invention, a one-step hydrothermal method is adopted, graphene oxide and a metal salt precursor are used as raw materials, a mixed solution (volume ratio is 1 2 O 3 the/G compound is a potassium-doped maghemite-coupled graphene compound combustion catalyst.
Specifically, a metal salt precursor is added into a graphene oxide solution, then an inorganic alkaline water solution is added, the mixture is stirred and mixed uniformly, and then a hydrothermal reaction is carried out to obtain the potassium-doped maghemite coupled graphene composite combustion catalyst.
Wherein the hydrothermal reaction temperature is 150-160 ℃, and the reaction time is 12h.
The precursor of the metal salt is Fe (NO) 3 ·9H 2 O。
Neither the flower cluster structure nor the gamma crystal hematite material can be obtained by adopting ferric sulfate or potassium ferricyanide.
The inorganic base is KOH.
The flower cluster structure of the invention cannot be obtained by adopting sodium acetate, sodium carbonate or sodium hydroxide, and the effect of the invention cannot be achieved.
The potassium-doped maghemite-coupled graphene composite combustion catalyst prepared by the method is K-Fe 2 O 3 The crystal form of the ferric oxide is gamma-shaped, and the microscopic appearance of the ferric oxide is in a flower cluster shape.
Namely the catalyst is the flower-like cluster K-Fe assembled by nano particles 2 O 3 Coupled graphene composite (K-Fe) 2 O 3 /G)。
The catalyst is used as a combustion catalyst for a propellant.
The graphene oxide can be manufactured by self or be commercialized.
Comparative example 1
Step 1: 0.248g Fe (NO) is weighed 3 ) 3 ·9H 2 Dissolving O in glycol solution;
step 2: preparing 5mL of 3.5mol/L KOH aqueous solution, and adding the solution into the solution obtained in the step 1; stirring at room temperature for 15min, transferring into a 25mL hydrothermal kettle, and keeping the temperature at 150 ℃ for 12h.
And 3, step 3: washing the obtained product with deionized water and absolute ethyl alcohol, and drying to obtain the final product K-Fe 2 O 3 。
Comparative example 2
Step 1: 0.248g Fe (NO) is weighed 3 ) 3 ·9H 2 Dissolving O in glycol solution;
step 2: preparing 5mL of 3.5mol/L KOH aqueous solution, cooling to room temperature, adding the solution into the system obtained in the step 1, stirring for 15min at room temperature, then transferring the solution into a 25mL hydrothermal kettle, and keeping the temperature at 160 ℃ for 12h.
And 3, step 3: washing the obtained product with deionized water and absolute ethyl alcohol, and drying to obtain the final product K-Fe 2 O 3 。
Example 1
Step 1: preparing 10mL of oxidized graphene glycol solution with the concentration of 1 mg/mL;
step 2: 0.248g Fe (NO) is weighed 3 ) 3 ·9H 2 Dissolving O in the graphene oxide solution;
and step 3: preparing 5mL of 3.5mol/L KOH aqueous solution, and adding the aqueous solution into the mixed solution obtained in the step 2; stirring at room temperature for 15min, transferring into a 25mL hydrothermal kettle, and keeping the temperature at 150 ℃ for 12h.
And 4, step 4: washing the obtained product with deionized water and absolute ethyl alcohol, and freeze drying or vacuum drying to obtain the final product K-Fe 2 O 3 /G-1。
Example 2
Step 1: preparing 10mL of oxidized graphene glycol solution with the concentration of 2.5 mg/mL;
step 2: 0.248g Fe (NO) is weighed 3 ) 3 ·9H 2 Dissolving O in the graphene oxide solution;
and step 3: preparing 5mL of 3.5mol/L KOH aqueous solution, stirring to completely dissolve the KOH aqueous solution, and adding the KOH aqueous solution into the mixed solution obtained in the step 2; stirring at room temperature for 15min, transferring into a 25mL hydrothermal kettle, and keeping the temperature at 150 ℃ for 12h.
And 4, step 4: washing the obtained product with deionized water and absolute ethyl alcohol, and freeze drying or vacuum drying to obtain the final product K-Fe 2 O 3 /G-2.5。
FIG. 1 is an XRD pattern of the products obtained in comparative example 1, comparative example 2, example 1 and example 2. The obtained product can be known from figure 1 to correspond to gamma-crystalline form Fe 2 O 3 (JCPDS # 39-1346) which is less intense due to the lower crystallinity of the product.
FIGS. 2 and 3 are K-Fe prepared in comparative example 1 and example 1, respectively 2 O 3 And K-Fe 2 O 3 TEM image of/G. As can be seen from the TEM image, K-Fe 2 O 3 Is in a flower cluster shape and is uniformly distributed on the surface of the graphene. FIG. 4 shows K-Fe prepared in comparative example 1 2 O 3 XPS survey spectrum of (1). The graph shows K-Fe 2 O 3 The elements comprise K, fe and O, wherein the C element is polluted carbon in the air.
Application example K-Fe 2 O 3 Evaluation of catalytic Effect of/G nanocomposites
K-Fe obtained in comparative example 1, example 1 and example 2 2 O 3 、K-Fe 2 O 3 Mixing the/G and an energetic material namely octogen (HMX) in a mass ratio of 1. And testing the prepared mixture by adopting a TA differential scanning calorimeter, and analyzing the thermal decomposition catalytic effect of the prepared sample on the energetic material. And (3) testing conditions are as follows: the sample dosage is as follows: about 0.2mg; the heating rate is 10 ℃/min; temperature range: 50-300 ℃; atmosphere: nitrogen atmosphere, gas flow rate: 50mL/min.
As can be seen from FIG. 5, K-Fe 2 O 3 、K-Fe 2 O 3 the/G has different catalytic effects on the HMX, so that the initial decomposition temperature and the exothermic decomposition temperature of the HMX are respectively obviously advanced, and the exothermic decomposition process of the HMX is changed into a solid decomposition process from melting and then decomposing. Wherein K-Fe 2 O 3 The catalytic thermal decomposition effect of/G-2.5 on HMX is most obvious. The composite material can be used as a combustion catalyst of a solid propellant, so that the combustion rate is improved, and the pressure index is reduced.
Example 3
Step 1: preparing a graphene oxide glycol solution with the concentration of 2.5 mg/mL;
and 2, step: 0.248g Fe (NO) is weighed 3 ) 3 ·9H 2 Dissolving O in the graphene oxide solution; graphene oxide with Fe (NO) 3 ) 3 ·9H 2 The mass ratio of O is 0.1:1.
and step 3: and (3.5) adding a KOH aqueous solution of 3.5mol/L into the mixed solution obtained in the step (2), stirring at room temperature for 15min, then transferring into a 25mL hydrothermal kettle, and preserving heat at 160 ℃ for 12h. Wherein the mass ratio of the graphene oxide to the KOH is 0.025:1, the volume ratio of water to ethylene glycol is 1.
And 4, step 4: and washing the obtained product with deionized water and absolute ethyl alcohol, and freeze-drying or vacuum-drying to obtain the potassium-doped maghemite-coupled graphene composite combustion catalyst.
Example 4
Step 1: preparing a graphene oxide ethylene glycol solution with the concentration of 1 mg/mL;
step 2: 0.248g Fe (NO) is weighed 3 ) 3 ·9H 2 Dissolving O in the graphene oxide solution; graphene oxide with Fe (NO) 3 ) 3 ·9H 2 The mass ratio of O is 0.04:1.
and step 3: and (3.5) adding a KOH aqueous solution of 3.5mol/L into the mixed solution obtained in the step (2), stirring at room temperature for 15min, then transferring into a 25mL hydrothermal kettle, and preserving heat at 150 ℃ for 10h. Wherein the mass ratio of the graphene oxide to the KOH is 0.01:1, the volume ratio of water to ethylene glycol is 1.
And 4, step 4: and washing the obtained product with deionized water and absolute ethyl alcohol, and freeze-drying or vacuum-drying to obtain the potassium-doped maghemite-coupled graphene composite combustion catalyst.
The catalyst prepared by the invention has the following functions:
the decomposition efficiency of the main components of the propellant can be improved, the sensitivity of the components of the propellant is reduced, a small amount of potassium element is doped in the composite catalyst, the secondary combustion of combustible gas in the tail gas of the rocket engine spray pipe can be inhibited, and the secondary combustion hazard is reduced, and the specific reference is as follows: RLi, J Wang, J P Shen, et al, preparation and Characterization of sensitive HMX/Graphene oxides Composites [ J ]. Propellants applications. Pyrotech.2013,38,798-804; a flame retardant containing 1,1' -dihydroxy-3, 3' -dinitro-5, 5' -bi-1, 2, 4-triazole dipotassium salt, CN 201518004862.7.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the present invention, which is defined by the appended claims.
Claims (10)
1. The potassium-doped maghemite-coupled graphene composite combustion catalyst is characterized in that graphene oxide, a metal salt precursor and a potassium-containing precipitator are dissolved in a mixed solvent of ethylene glycol and water to carry out hydrothermal reaction, so that the potassium-doped maghemite-coupled graphene composite combustion catalyst is obtained.
2. The potassium-doped maghemite-coupled graphene composite combustion catalyst as claimed in claim 1, wherein the metal salt precursor is Fe (NO) 3 ·9H 2 O。
3. The potassium-doped maghemite-coupled graphene composite combustion catalyst as claimed in claim 1, wherein the precipitant is potassium hydroxide.
4. The potassium-doped maghemite-coupled graphene composite combustion catalyst as claimed in claim 1, wherein the solvent is a mixed solvent of water and ethylene glycol in a volume ratio of 1.
5. The potassium-doped maghemite-coupled graphene composite combustion catalyst as claimed in claim 1, wherein the mass ratio of the graphene oxide to the metal salt precursor is 0.04-0.1: 1.
6. the potassium-doped maghemite-coupled graphene composite combustion catalyst according to claim 1, wherein the mass ratio of the graphene oxide to the potassium-containing precipitant is 0.01-0.025: 1.
7. the potassium-doped maghemite-coupled graphene composite combustion catalyst as claimed in claim 1, wherein the dosage ratio of graphene oxide to solvent is 10-25 mg:15mL.
8. The potassium-doped maghemite-coupled graphene composite combustion catalyst as claimed in claim 1, wherein the hydrothermal reaction temperature is 150-160 ℃ and the time is 10-12 h.
9. The potassium-doped maghemite-coupled graphene composite combustion catalyst prepared by the method according to any one of claims 1 to 8, wherein the crystal form of iron oxide in the catalyst is gamma-type, the micro-morphology of the catalyst is in a flower cluster shape, and the catalyst is doped with potassium element.
10. Use of the potassium-doped maghemite-coupled graphene composite combustion catalyst prepared according to any one of claims 1-8 as a combustion catalyst for a propellant in catalyzing the combustion of a solid propellant.
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| CN116786128A (en) * | 2023-05-29 | 2023-09-22 | 中国科学院大连化学物理研究所 | Alkali metal doped gamma-Fe 2 O 3 Preparation method and application of catalyst |
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| US20040265214A1 (en) * | 2003-06-06 | 2004-12-30 | University Of Utah | Composite combustion catalyst and associated methods |
| US20130157135A1 (en) * | 2010-09-10 | 2013-06-20 | Mingjie Zhou | Lithium salt-graphene-containing composite material and preparation method thereof |
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| CN116786128B (en) * | 2023-05-29 | 2024-04-16 | 中国科学院大连化学物理研究所 | Alkali metal doped gamma-Fe2O3Preparation method and application of catalyst |
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