Abstract

Titanium dioxide (TiO2 titania) hollow sphere was simply synthesized using various ionic liquids (ILs). The shape and size of TiO2 particles were significantly different with the composition of ILs. This is mainly attributed to the interaction between organic solvent and IL at the interface leading to the formation of sphere. Among the binary ILs, [Bmim][BF4] + [Omim][PF6], [Bmim][BF4] + [Omim][PF6], and [Bmim][PF6] + [Hmim][PF6] were useful to prepare TiO2 nanostructures with high surface area and anatase phase. Especially, [Bmim][BF4] + [Omim][PF6] was the most effective IL to synthesize an anatase TiO2 hollow sphere.

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