Effective Composite Preparation between Graphite and Iron Particles by the Interfacial Mediation of Force-Activated Oxygen Atoms
Effective Composite Preparation between Graphite and Iron Particles by the Interfacial Mediation of Force-Activated Oxygen Atoms
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DOI：
10.1021/ie501207u
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发表时间：
2014-10
影响因子：
4.2
通讯作者：
S. Motozuka;M. Tagaya;Kota Shiba;Zhefeng Xu;M. Nishikawa;T. Yoshioka;T. Ikoma;J. Tanaka
中科院分区：
文献类型：
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作者：
S. Motozuka;M. Tagaya;Kota Shiba;Zhefeng Xu;M. Nishikawa;T. Yoshioka;T. Ikoma;J. Tanaka
制备了机械化学活化石墨（Gp）和铁颗粒表面，并阐明了Gp/铁复合界面的新功能。介绍了在氧气气氛下用磨粉法制备的带有氧原子的活化铁颗粒。另一方面，在氩气气氛下研磨活化的Gp粒子由于边缘表面的悬垂键而容易聚集。复合材料在保留碳原子六环结构的同时，明显诱导了Gp与铁氧化物之间的界面键（如Fe-O-C）。此外，分子轨道计算表明，氧化铁中的活性氧原子有效地从Gp边缘的C-H基团中抽离氢原子，产生可形成界面键的活性裸碳原子；因此，成功制备了具有较高粘接强度的Fe-O-C界面键。
Mechanochemically activated graphite (Gp) and iron particle surfaces were prepared, and the Gp/iron composite interfaces were elucidated to utilize new functions. Activated iron particles with the oxygen atoms prepared by a milling under oxygen atmosphere were shown. Alternately, the Gp particles activated by the milling under argon atmosphere easily agglomerated because of the dangling bonds on the edge surfaces. In the composites, the interfacial bonds (e.g., Fe–O–C) between the Gp and iron oxides on the iron were clearly induced while preserving the carbon atom six-ring structures. Furthermore, the molecular orbital calculations suggested that the activated oxygen atoms in the iron oxides effectively abstract hydrogen atoms from the C–H groups of the Gp edge, resulting in the active bare carbon atoms which can form the interfacial bonds; therefore, the interfacial Fe–O–C bonds for a higher adhesive strength were successfully prepared.