10 wt.% and 20 wt.%Li-TiO₂ composite powders are synthesized by a sol-gel method using titanium isopropoxide and Li₂CO₃ as precursors. The as-received amorphous 10 wt.%Li-TiO₂ composite powders crystallize into the anatase-type crystal structure upon calcination at 450°C, which then changes to the rutile phase at 750°C. The asreceived 20 wt%Li-TiO₂ composite powders, on the other hand, crystallize into the anatase-type structure. As the calcination temperature increases, the anatase TiO₂ phase gets transformed to the LiTiO₂ phase. The peaks for the samples obtained after calcination at 900°C mainly exhibit the LiTiO₂ and Li₂TiO₃ phases. For a comparison of the photocatalytic activity, 10 wt.% and 20 wt.% Li-TiO₂ composite powders calcined at 450°C, 600°C, and 750°C are used. The 20 wt.%Li-TiO₂ composite powders calcined at 600°C show excellent efficiency for the removal of methylorange.

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