Insight into polymetallic catalysts on combustion performance and mechanism of RDX-CMDB propellant: Bimetallic MOFs and trimetallic hexanitro complexes

Fuel, Journal Year: 2025, Volume and Issue: 390, P. 134683 - 134683

Published: Feb. 15, 2025

Language: Английский

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Microflower-like Fe-Co-MOF with enhanced catalytic performance for decomposition of ammonium perchlorate and combustion of ammonium perchlorate-based composite propellants

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 56, P. 104281 - 104281

Published: March 18, 2024

Ammonium perchlorate (AP) serves as a crucial component in solid propellants. Enhancing its thermal decomposition with catalysts improves the combustion performance of propellants significantly. To enhance catalytic metal-organic frameworks (MOFs) on AP, this study controlled morphology MOFs by adding metal atoms, resulting Fe-Co-MOF catalyst higher specific surface area and dual-metal synergistic effect. The effect AP was investigated using DSC TG-IR, followed studying influence AP-based composite results show that introduction 5% reduced temperature to 298.6 °C, decreased activation energy 151.6 kJ mol-1, increased heat release 110.6%. Additionally, ignition delay propellant 71 ms, rate 43.8%. Mechanistic studies demonstrate abundant sites oxygen vacancies facilitate charge transfer during process promote increase suppressing high-temperature conversion N2O. This research paves way for enhancing application MOF materials

Language: Английский

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Engineered Conductive Metal–organic Frameworks for Electrochemical Detection of Urinary Biomarkers

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 22, 2024

Abstract The increasing prevalence of health concerns has sparked a demand for advanced monitoring tools, which is significant challenge researchers. Analysis biofluid samples and biomarker vital comprehensive assessment. In this context, metal–organic frameworks (MOFs) have emerged as one the leading materials developing cutting‐edge artificial sensors. These unique MOFs been developed from metallic organic linkers consist tunable pores dynamic surface areas, attracting various guest molecules to participate in electrochemical devices. This study gateway world where MOF designs transcend mere inventions, morphing into electric marvels that revolutionize urine sample monitoring. From inception design fabrication sensors tailored applications, prides itself on elucidating factors affecting MOF‐based electrical devices Moreover, focus placed conductivity, electrode properties, recent state‐of‐the‐art analysis, highlighting pivotal role biomarkers play honing resilience performance Finally, specific used analysis. It will attract researchers develop new portable tools by analyzing samples.

Language: Английский

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Preparation of microstructure controllable CL-20/FOX-7 composite microspheres by microchannel recrystallization technology to enhance safety and combustion performance

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 155869 - 155869

Published: Sept. 1, 2024

Language: Английский

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Exploring Green Pyrotechnic Formulations and Primary Explosives with 1,3,4‐Oxadiazole‐Based Micro and Submicron Energetic Coordination Polymers

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Abstract Alkali and alkaline‐earth metal incorporated 5,5′‐dinitramino‐3,3′‐azo‐1,3,4‐oxadiazole (H 2 DNAO) based Energetic Coordination Polymers (ECPs), namely dipotassium 5,5′‐dinitramino‐3,3′‐azo‐1,3,4‐oxadiazole(K DNAO), dicesium 5,5′‐dinitramino‐3,3′‐azo‐1,3,4‐oxadiazole(Cs barium 5,5′‐dinitramino‐3,3′‐azo‐1,3,4‐oxadiazole(BaDNAO) are synthesized for the first time. Synthesized ECPs thoroughly characterized using infrared spectroscopy (IR), elemental analysis (EA), thermogravimetric differential scanning calorimetry (TGA‐DSC), field emission electron microscopy (FE‐SEM), dynamic light scattering (DLS), UV–vis spectroscopy. All also confirmed by single‐crystal X‐ray diffraction technique (SC‐XRD). The micro‐ECPs exhibit excellent densities (1.98–2.80 g cm −3 ), insensitivities (IS: 25‐40 J; FS: 240‐360 N), good thermal stabilities ( T d : 182–212 °C). K DNAO Cs show detonation performance (VOD:7460‐7893 m s −1 ; DP: 27.5‐30.6 GPa), respectively. To further investigate sub‐micron‐energetics, three sub‐micron prepared from their micro counterparts ultrasonication method, demonstrating significant improvement in stability 194–221 °C) but highly sensitivity 2‐15J; 40‐360N). Burning tests of two experimental formulations demonstrate potential green pyrotechnic applications. Interestingly, submicron‐counterparts remarkable initiating capability. Considering ease synthesis, safety profile, these materials can be effectively transported microform rapidly converted into submicron‐form on demand, making them suitable

Language: Английский

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Efficiently Constructed Core‐Shelled Structured AP‐Based Composites with Excellent Balance of High Energy Release and Low Sensitivity

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Abstract Ammonium perchlorate (AP) plays an important role in solid propellants because of its high specific impulse, energy density and low cost. However, the excellent performance cannot conceal many shortcomings AP, problems non‐concentrated exothermic, sensitivity hygroscopicity still seriously impede application propellants. In this study, solvent evaporation method is used to directionally modify order cupric oxide (CuO) fluororubber (F 2603 ) shell layers so as obtain AP‐based composites with different core‐shell structures. The interlayer binding energies structures are explored by theoretical calculations, it demonstrated that have stability. addition, CuO valence‐band holes not only reduces peak temperature decomposition AP (440.4 354.5 °C), but also enhances combustion properties undergoing thermite reaction Al. Furthermore, hydrophobicity barrier F greatly strengthened mechanical reduced their sensitivity. summary, core‐shelled prepared strategy possessed 5‐in‐1 properties, which provided a new idea for targeted modulation energetic materials.

Language: Английский

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Bimetallic MOF (Mn/Co) constructed by active dicyandiamide linker for a promising combustion catalyst of solid propellant

Defence Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Two multi-responsive metal-organic framework-based fluorescence probes for turn-on detection of n-hexane/cyclohexane and turn-off detection of Fe3+ ions

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 106497 - 106497

Published: April 1, 2025

Language: Английский

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Uv–vis diffuse reflectance spectroscopy-driven quantification of nano-MnO2 dispersion for catalytic thermal decomposition and combustion optimization in ammonium perchlorate composites

Chemical Engineering Science, Journal Year: 2025, Volume and Issue: unknown, P. 121870 - 121870

Published: May 1, 2025

Language: Английский

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Synthesis, Structure, and AP Catalytic Performance of Two New 1D Coordination Polymers

Journal of Solid State Chemistry, Journal Year: 2024, Volume and Issue: 341, P. 125077 - 125077

Published: Oct. 21, 2024

Language: Английский

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