| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1331373 | Journal of Solid State Chemistry | 2013 | 7 Pages |
Hybrid nanostructures produced by hydrothermal treatment of TiO2 in the presence of bioactive organic substances such as chitosan, aminoterephthalic acid and their mixture have been investigated. Sodium polytitanates as one-dimensional elongated structures with lengths of several hundred of nanometers were obtained in the presence of chitosan and aminoterephthalic acid. With chitosan the elongated nanostructures are formed by successive superposition of structural fragments—nanostrips with well-ordered multilayered morphology and increased distance between successive layers to 1.2 nm. Quite different amorphous products as agglomerates with roundest and rhomboid morphology are formed when the mixture of chitosan and aminoterephthalic acid is added to the reaction system. One can propose that main reason of such behavior is a low rate of diffusion of dissolved Ti(IV) ions in the high viscous mixed chitosan–aminoterephthalic system. An effect of organic substances on the formation, morphology and transformation of various titanates is discussed.
Graphical abstractThe typical images of hybrid nanostructures produced by hydrothermal treatment of TiO2 in the presence chitosan and mixed chitosan with aminoterephthalic acid.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Various shapes of TiO2 based structures can be produced in the presence of organic. ► An addition of chitosan results in the formation of the elongated nanostructures. ► These structures have multilayered morphology and increased distance between layers. ► Different agglomerates are formed when chitosan and aminoterephthalic acid are mixed.
