Copper Azide Nanoparticle-Encapsulating MOF-Derived Porous Carbon: Electrochemical Preparation for High-Performance Primary Explosive Film,Small

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Copper Azide Nanoparticle-Encapsulating MOF-Derived Porous Carbon: Electrochemical Preparation for High-Performance Primary Explosive Film
Small ( IF 13.0 ) Pub Date : 2022-02-10 , DOI: 10.1002/smll.202107364
Chunpei Yu _{1,

2} , Wenchao Zhang _{1,

2} , Mingchun Xian _{1,

2} , Jiaxin Wang _{1,

2} , Junhong Chen _{1,

2} , Yajie Chen _{1,

2} , Wei Shi _{1,

2} , Gexing Yang _{1,

2} , Jiahai Ye _{1,

2} , Kefeng Ma _{1,

2} , Junwu Zhu _{1,

2}

Affiliation

It is highly desired but still remains challenging to design a primary explosive-based nanoparticle-encapsulated conductive skeleton for the development of powerful yet safe energetic films employed in miniaturized explosive systems. Herein, a proof-of-concept electrochemical preparation of metal–organic frameworks (MOFs) derived porous carbon embedding copper-based azide (Cu(N₃)₂ or CuN₃, CA) nanoparticles on copper substrate is described. A Cu-based MOF, i.e., Cu-BTC is fabricated based on anodized Cu(OH)₂ nanorods, as a template, to achieve CA/C film through pyrolysis and electrochemical azidation. Such a CA/C film, which is woven by numerous ultrafine nanofibers, favorably demonstrates excellent energy release (945–2090 J g^-1), tunable electrostatic sensitivity (0.22–1.39 mJ), and considerable initiation ability. The performance is superior to most reported primary explosives, since the CA nanoparticles contribute to high brisance and the protection of the porous carbon network. Notably, the growth mechanism of the CA/C film is further disclosed by detailed experimental investigation and density functional theory (DFT) calculation. This work will offer new insight to design and develop a CA-based primary explosive film for applications in advanced explosive systems.

中文翻译：

叠氮化铜纳米粒子包覆 MOF 衍生多孔碳：高性能初级炸药膜的电化学制备

设计一种基于初级炸药的纳米粒子封装的导电骨架是非常需要但仍然具有挑战性的，以开发用于小型炸药系统的强大而安全的高能薄膜。在此，描述了金属-有机框架 (MOF) 衍生的多孔碳嵌入铜基叠氮化物 (Cu(N ₃ ) ₂或 CuN ₃ , CA) 纳米粒子在铜基底上的概念验证电化学制备。_{以阳极氧化的Cu(OH) 2}纳米棒为模板，通过热解和电化学叠氮化制备了Cu基MOF，即Cu-BTC 。这种由大量超细纳米纤维编织而成的 CA/C 薄膜具有出色的能量释放（945-2090 J g^-1 )、可调的静电灵敏度 (0.22–1.39 mJ) 和相当大的启动能力。其性能优于大多数报道的初级炸药，因为 CA 纳米粒子有助于高脆度和多孔碳网络的保护。值得注意的是，通过详细的实验研究和密度泛函理论 (DFT) 计算进一步揭示了 CA/C 薄膜的生长机制。这项工作将为设计和开发用于先进爆炸系统的基于 CA 的起爆膜提供新的见解。

更新日期：2022-02-10

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