La(OH)3 Hollow Nanostructures with Trapezohedron Morphologies Using a New Kirkendall Diffusion Couple

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• 作者：Fang Niu ; An-Min Cao ; Wei-Guo Song ; Li-Jun Wan
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：November 20, 2008
• 年：2008
• 卷：112
• 期：46
• 页码：17988-17993
• 全文大小：395K
• 年卷期：v.112,no.46(November 20, 2008)
• ISSN：1932-7455

文摘

A highly symmetric trapezohedron of lanthanum glycolate precursor is converted to hollow La(OH)₃ with the same morphology via a simple hydrothermal treatment of the lanthanum glycolate precursor in an alkaline solution. The formation process of the hollow structure is the result of the Kirkendall effect, in which a new diffusion couple, water and lanthanum glycolate, is proposed. This expands the scope of the Kirkendall effect in material fabrication. The hollow La(OH)₃ trapezohedron can be further converted into hollow La₂O₃ material by calcinations. The as-prepared La(OH)₃ hollow trapezohedron shows excellent ability to remove certain organic pollutants in wastewater.