Please provide any details which can lead to enhancement of adsorption capacity. Or is there some mixed adsorbent like some additive added with TiO2 which is more efficient?
Sorry, can not answer, but, probably, this reference could help:
Nagamine, S., Ueda, T., Masuda, I., Mori, T., Sasaoka, E., Joko, I., 2003. Removal of phosphorus from wastewater by crystallization on the surface of macroporous TiO 2 with a fibrous microstructure. Ind. Eng. Chem. Res. 42,