Hydrothermal synthesis, crystal structure and thermal stability of Ba-titanate nanotubes with layered crystal structure

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• 作者：B.A. Marinkovic ; P.M. Jardim ; E. Morgado Jr. ; M.A.S. de Abreu ; G.T. Moure ; F. Rizzo
• 关键词：A. Nanostructures ; A. Layered compounds ; C. Electron microscopy ; C. X-ray diffraction ; D. Crystal structure
• 刊名：Materials Research Bulletin
• 出版年：2008
• 期刊代码：60_00255408
• 类别：ms
• 出版时间：3 June 2008
• 卷：43
• 期：6
• 页码：1562-1572
• 文件大小：1450 K

摘要

BaTi₃O₇·nH₂O nanotubes have been synthesized through a hydrothermal reaction between Na-rich trititanate nanotubes and Ba(OH)₂ within the pH range 12–8.2. These nanotubes possess the same layered crystal structure of the precursor Na_2−xH_xTi₃O₇·nH₂O. They also keep the morphology of their precursor Na-trititanate nanotubes used in the synthesis, having an external diameter of 20–25 nm. The BaTi₃O₇·nH₂O nanotubes remained fully stable up to 300 °C, while nanotubular form continues to exist up to 600 °C, together with amorphous particles.