Facile Synthesis of Nanostructured Anatase Titania with Controllable Morphology via Oxidation of TiC with Hydrogen Peroxide

Figure 4

(a) TEM image for the acidic powder obtained after the oxidation of TiC with H₂O₂ for 20 hours, displaying the morphology of spongy balls made of entwining 2D nanosheets. Inset is the SAED showing the observable diffraction rings. (b) HRTEM image of a 2D nanosheet, demonstrating the presence of crystallized nanograins. (c) SEM image for the nanostructured anatase TiO₂ obtained by annealing the amorphous acidic powder in (b) at 750°C for 2 hours, showing the morphology of spongy spheres. Inset is an enlarged SEM image for the surface of a spongy sphere. (d) RT Raman (top) and XRD pattern (bottom) for the annealing-produced anatase TiO₂ in (c).

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