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Hydrothermal synthesis, crystal structure and thermal stability of Ba-titanate nanotubes with layered crystal structure |
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| Authors: | BA Marinkovic PM Jardim E Morgado Jr MAS de Abreu GT Moure F Rizzo |
| Affiliation: | aPontifícia Universidade Católica do Rio de Janeiro, Grupo de Transformação de Fases e Caracterização de Materiais, Departamento de Ciência dos Materiais e Metalurgia, Rua Marquês de São Vicente 225, 22453-900 Rio de Janeiro, RJ, Brazil bPetrobras S.A./CENPES, Cidade Universitária, Quadra 7, 21949-900 Rio de Janeiro, RJ, Brazil |
| Abstract: | 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 Na2?xHxTi3O7·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. |
| Keywords: | A Nanostructures A Layered compounds C Electron microscopy C X-ray diffraction D Crystal structure |
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