Boron nitride encapsulated copper nanoparticles: a facile one-step synthesis and their effect on thermal decomposition of ammonium perchlorate.
Boron nitride encapsulated copper nanoparticles: a facile one-step synthesis and their effect on thermal decomposition of ammonium perchlorate.
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氮化硼封装的铜纳米颗粒：一种简便的一步合成及其对高氯酸铵热分解的影响
DOI：
10.1038/srep16736
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发表时间：
2015-11-16
影响因子：
4.6
通讯作者：
Qiu X
中科院分区：
文献类型：
--
作者：
Huang C;Liu Q;Fan W;Qiu X
反应活性对于金属纳米颗粒作为催化剂、生物材料和先进传感器具有重要意义，但追求高反应活性与金属纳米颗粒所要求的高化学稳定性似乎是相冲突的。反应性和稳定性之间存在微妙的平衡。对于使用有机封端试剂的胶体金属纳米颗粒，这可以达到，而对于粉末金属纳米颗粒，这是具有挑战性的。在这里，我们开发了一种替代的方法来封装铜纳米粒子与化学惰性材料-六方氮化硼。包覆铜纳米粒子不仅在空气气氛下具有良好的抗氧化性能，而且对高氯酸铵的热分解具有良好的促进作用。这种方法为设计具有高稳定性和高反应性的金属纳米粒子及其技术应用开辟了道路。
Reactivity is of great importance for metal nanoparticles used as catalysts, biomaterials and advanced sensors, but seeking for high reactivity seems to be conflict with high chemical stability required for metal nanoparticles. There is a subtle balance between reactivity and stability. This could be reached for colloidal metal nanoparticles using organic capping reagents, whereas it is challenging for powder metal nanoparticles. Here, we developed an alternative approach to encapsulate copper nanoparticles with a chemical inertness material—hexagonal boron nitride. The wrapped copper nanoparticles not only exhibit high oxidation resistance under air atmosphere, but also keep excellent promoting effect on thermal decomposition of ammonium perchlorate. This approach opens the way to design metal nanoparticles with both high stability and reactivity for nanocatalysts and their technological application.