Preparation And Catalytic Decomposition Performance Of GO-NiCo₂O₄ And GO-CuCo₂O₄ In Situ Growth The Study

The ballistic performance of the rocket engine depends on the combustion performance of the solid propellant.In order to improve the overall performance of the solid propellant,adding the right amount of catalyst is the best way.Nano-composite metal oxides have good physicochemical properties such as good chemical stability,high thermal stability,and difficulty in reacting with the acidic components in the propellant,etc.;the nano-composite metal oxides are doped with each other in the crystal lattice,and can easily cause surface charges.The transfer,lattice changes,resulting in increased crystal surface active sites,so that the catalyst has a higher catalytic activity.The same type of catalyst contains various kinds of catalysts,and the combustion process catalyzes the formation of "friendly and cooperative" assistance among the components.As a good carrier,graphene oxide combines the nanocomposite metal oxide with graphene oxide to inhibit the agglomeration of nanoparticles and accelerate the transfer of electrons,thereby further improving the catalytic performance.GO-NiCo₂O₄ and GO-CuCo₂O₄ were synthesized by in situ growth technique.GO-NiCo₂O₄ is a nanoparticle rod that has a chemical reaction on the surface of graphene oxide,forming a stable structure and distributed on the surface of GO.GO-CuCo₂O₄ is the contact between graphene and graphene oxide during the growth of nano particles.Graphene oxide uniformly load on the surface of particles,so that micron sized particles become nano particles,which increases the specific surface area and improves the catalytic activity.In comparison with the self assembled composites,the structure of the in situ growth was found to be stableIn this paper,cobalt acid nanocomposite oxides were prepared,and nano metal composite oxides and graphene oxide composites were synthesized by in-situ growth technology.The catalytic effects of nanocomposites on RDX,HMX and AP were further studied.The main contents are as follows:?1?Using in situ growth techniques,GO-NiCo₂O₄ and GO-CuCo₂O₄ were synthesized.GO-NiCo₂O₄ is a nanoparticle rod chemical reaction occurs on the surface of graphene oxide,forming a stable structure,which evenly distributed on the surface of GO,does not fall off.GO-CuCo₂O₄ is in contact with the graphene oxide during the growth process of the nanoparticles,the graphene oxide is uniformly loaded on the surface of the particles,the micrometer-sized particles become nano-sized particles,the specific surface area is increased,the catalytic activity is increased,and the surface thereof The structure also changed from acicular to uneven.In comparison with the self-assembled composites,it was found that the in-situ growth has a good mechanical strength.The existence of GO was proved by means of characterizations such as Raman,TEM and XPS.?2?The catalytic effects of different types of composites on RDX,HMX and AP were studied.The results showed that the composites synthesized in situ had the best catalytic effect.The thermal decomposition temperature of RDX decreased by 34.4 ?with GO-NiCo₂O₄.The thermal decomposition temperature of RDX decreased by 24.5 ? with GO-CuCo₂O₄.The catalytic effect of composites is much higher than that of the individual components.Nanocomposites greatly improve performance by assisting each other with active molecules.Nanocomposites also have a good catalytic effect on HMX and AP.GO-NiCo₂O₄/RDX:d?/dT = 10^14.68/?2?1-??^3/2 exp?-1.63 ×10⁵/RT?GO-NiCo₂O₄/HMX:d?/dT =10^49.65/2?5?1-??[-1n?1-??]^3/5 exp?-5.42×10⁵/RT?GO-NiCo₂O₄/AP d?/dT = 10^8.55/?3?1-??[-1n?1-??]^2/3 exp?-1.3 5×10⁵/RT?GO-CuCo₂O₄/RDX:d?/dT = 10⁽13.64/2?3?1-??[-1n?1-??]^1/3 exp?-1.53 × 10⁵/RT?GO-CuCo₂O₄/HMX:d?/dT = 10^49.65/?2?1-??^1/2 exp?-5.42 × 10⁵/RT?GO-CuCo₂O₄/AP:d?/dT = 10^49.65/?2?1-??^1/2 exp?-5.42 × 10⁵/RT?...