爆轰法合成碳包覆镍纳米颗粒的研究(英文)  

Detonation Synthesis of Carbon-Encapsulated Nickel Nanoparticles

作　　者：罗宁[1,2] 李晓杰[2] 费鸿禄[1] 莫非[2] 张程娇[2] 

机构地区：[1]辽宁工程技术大学爆破技术研究院,辽宁阜新123000 [2]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《高压物理学报》2011年第2期111-117,共7页Chinese Journal of High Pressure Physics

基　　金：National Natural Science Foundation of China(10872044,10902023,10972051);National Science Foundation of Liaoning Province of China(2008161)

摘　　要：采用自制的负氧平衡复合炸药前驱体,在密闭容器中充氮气保护下爆轰合成了碳包覆镍纳米颗粒。利用X射线衍射、X射线荧光、透射电镜和拉曼光谱等技术,对爆炸产物的组成成分、结构形貌等进行了观测。结果表明,爆轰产物主要由具有面心立方结构的镍晶核和碳元素构成,此外还含有其它微量元素;合成的纳米颗粒呈球形或椭球形状,颗粒尺寸主要分布在10~25 nm范围,包覆的碳壳厚度约1~2 nm,核壳结构完备。结合观测结果,对爆轰法合成碳包覆纳米颗粒的形成机制进行了简单的讨论。Carbon-encapsulated nickel nanoparticles（CENNPs） with core-shell structure were synthesized by detonation method using homemade composite explosives with negative oxygen balance.The detonation chemical reaction was initiated by a nonel tube detonator in a closed explosion vessel filled with nitrogen gas.X-ray diffraction（XRD）,X-ray fluorescence（XRF）,transmission electron microscopy（TEM） with selected area electron diffraction and Raman spectrum techniques were used to characterize the as-obtained detonation products.The XRD and XRF analysis showed that the detonation products mainly consisted of the well-crystallized face-centered cubic nickel nanocrystals,carbon and other microelement.TEM showed that most nanoparticles are made up of a nickel core with the size of 10~25 nm and a carbon shell with the thickness of 1~2 nm.The Raman spectrum analysis indicated that the coating carbon shell is mainly composed of graphite and amorphous carbon.Furthermore,the possible formation mechanism for CENNPs were also discussed.

关 键 词：碳包覆镍纳米颗粒 爆轰合成 X射线衍射 合成机制 

分 类 号：O389[理学—流体力学] O521.9[理学—力学]