Inducing growth of FeNi-Pt match-like magnetic nanoheterostructures on Pt nanotips and dechlorination of hydrochloric ether.
Inducing growth of FeNi-Pt match-like magnetic nanoheterostructures on Pt nanotips and dechlorination of hydrochloric ether.
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DOI：
10.1002/cphc.201100429
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发表时间：
2011-12
期刊：
影响因子：
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通讯作者：
M. Wen;Fan Zhang;Mingzhu Cheng;Qingsheng Wu;Baolei Sun;Yuzhen Sun
中科院分区：
文献类型：
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作者：
M. Wen;Fan Zhang;Mingzhu Cheng;Qingsheng Wu;Baolei Sun;Yuzhen Sun
通过在铂纳米针尖上诱导生长FeNi纳米棒，合成了新型磁性FeNi-铂匹配异质结构纳米棒。用扫描电子显微镜、透射电子显微镜、X射线衍射仪和X射线光电子能谱对合成机理进行了验证。磁行为表明，磁饱和和矫直力强烈地依赖于形状和合金成分。由于纳米棒的各向异性较大，合成的纳米棒的饱和磁化强度(Ms)和矫顽力(Hc)比纳米棒的大。Fe(82)Ni(15)-Pt(3)在226.6 emu g(-1)处获得最大饱和磁化强度，而Fe(20)Ni(77)-Pt(3)在136.8 Oe处获得最大矫顽力。观察到FeNi-Pt异质结构纳米材料对氯化溶剂还原的依赖形状的反应。特别是Fe(82)Ni(15)-Pt3纳米棒在1，1，2，2-四氯乙烷的脱氯反应中具有很高的活性。
Newly designed magnetic FeNi-Pt match-like heterostructured nanorods were synthesized by means of induced growth of FeNi nanorods on Pt nanotips. The proposed synthesis mechanism is corroborated by SEM, TEM, XRD and XPS. The magnetic behavior shows that the magnetic saturation and coercivity are strongly dependent on both the shape and the alloy composition. The saturation magnetizations (Ms) and the coercivity (Hc) of nanorods synthesized are larger than those of nanoparticles because of the relatively large anisotropy of nanorods. Maximum saturation magnetization is obtained for Fe(82) Ni(15) -Pt(3) at 226.6 emu g(-1), whereas maximum coercivity is obtained for Fe(20)Ni(77)-Pt(3) at 136.8 Oe. Shape-dependent reactivity toward the reduction of chlorinated solvents was observed for the FeNi-Pt heterostructured nanomaterials. In particular, the Fe(82)Ni(15)-Pt(3) nanorods are highly reactive in the dechlorination process of 1,1,2,2-tetrachloroethane.