A nanoparticle assembly method for the production of crystalline ordered mesoporous titanium oxide/carbon composites

摘要

We demonstrate a simple and reproducible method to prepare thermally stable, crystalline mesoporous Ti oxide/carbon composites. The composites were obtained using titania nanopartides as inorganic precursors, phenolic resols as carbon sources, and triblock copolymer F127 as a template based on the solvent evaporation-induced self-assembly process. The use of stable titania nanopartides favored the reproducible preparation of mesoporous Ti-C composites over a wide range of Ti oxide/carbon ratios without the control of atmospheric humidity. Various analysis techniques have been used to investigate the pore structure and crystallinity as a function of synthesis conditions. The resultant composites have an ordered 2D hexagonal mesostructure with high surface areas (200-800 m~2 g~(-1)). In addition to the calcination temperature, the carbon content also has significant effect on the crystalline transformation of titanium species.