Synthesis and magnetic properties of nanoporous Co₃O₄ nanoflowers

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• 作者：Yuanguang Zhang ; Youcun Chen ; Tao Wang ; Juhong Zhou ; Yinguo Zhao
• 关键词：Co₃O₄ ; Synthesis ; Magnetic Properties ; Nanoflowers
• 刊名：Microporous and Mesoporous Materials
• 出版年：2008
• 出版时间：1 September 2008
• 年：2008
• 卷：114
• 期：1-3
• 页码：257-261
• 全文大小：477 K

文摘

Nanoporous Co₃O₄ hierarchical nanoflowers have been prepared through sequential process of a hydrothermal reaction and heat treatment. These nanoflowers consisting of a great deal of Co₃O₄ nanofibers have bimodal pore structures and Brunauer–Emmett–Teller surface area of 34.61 m²/g. The temperature dependence curves of magnetization in zero-field-cooled and field-cooled exhibit main antiferromagnet and weak ferromagnet of Co₃O₄ nanoflowers at blocking temperature of 34 K, respectively. In addition, analysis of their optic properties obviously indicates red shift of absorption peaks, exhibiting quantum-confined effect and traits of semiconductor.