Carbon-encapsulated Fe nanoparticles from detonation-induced pyrolysis of ferrocene

被引：173

作者：

Lu, Y

Zhu, ZP ^{[1
]}

Liu, ZY

机构：

[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

CARBON | 2005年 / 43卷 / 02期

关键词：

graphitic carbon; pyrolysis; electron microscopy; Raman spectroscopy; X-ray diffraction;

D O I：

10.1016/j.carbon.2004.09.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Carbon-encapsulated Fe nanoparticles with size between 5 and 20 nm were synthesized via a picric acid-detonation-induced pyrolysis of ferrocene, which is characterized by a self-heating and extremely fast process. The nanoparticles exhibit well-constructed core-shell structures, with bcc-Fe cores and graphitic shells. The graphitic shells can protect effectively the cores against the attack of HNO3 solution. The formation of the core-shell nanoparticles can be selectively controlled by adjusting the composition of the picric acid-ferrocene mixture, which determines C/Fe atomic ratio of the reaction system. The core-shell nanoparticles are preferably formed at low C/Fe atomic ratios, while tubular structures are formed at high C/Fe ratio. The possible pathway for the carbon-encapsulated Fe nanoparticles formation is discussed briefly. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：369 / 374

页数：6

共 38 条

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