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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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