One Titanium Dioxide Nanoparticles suspension prepared by sonicating frequently for dispersion and then used for column experiment does have different properties . Other TiO2 suspension prepared by keeping it for 10 days after first time sonication and then filtering it . The Filtrate is taken as it has TiO2 in suspension and then performing any experiment through that suspension. Which is better or what is the difference in properties of these two suspension.