Oriented Nanostructured Titanates Array from Low Concentration Alkaline Solution via Hydrothermal Process
Na2Ti2O5·H2O nanowire/nanobelt array and other nanostructures were hydrothermally prepared on Ti substrate in low concentration NaOH solution (<5 mol/L). Then the Na2Ti2O5·H2O nanostructures were converted to H2Ti2O5·H2 O through an ion-exchange process and finally to TiO2 anatase by calcination at 450 C without changing their nanostructures. The morphology of the prepared Na2Ti2O5·H2O nanostructures could be controlled by varying the experimental parameters such as hydrothermal temperature and alkaline solution. The formation mechanism of the nanoarray was also discussed.
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Document Type: Research Article
Publication date: 2011-03-01
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