“…As one kind of important semiconductor material, anatase phase TiO 2 is a better choice to use as photocatalysts [10][11][12][13], gas sensors [14], surface functionalization [15], biomaterials [16], lithium batteries [17] and solar cells [18,19] due to its nontoxicity, low cost, and delivering ability. Many methods have been reported to synthesize TiO 2 mesoporous structures in the literature [20][21][22]. Li and co-workers [23] described a sol-spraying-calcination method to fabricate a new type of TiO 2 microsphere photocatalyst with a particle size of 30-160 nm.…”