TiO2
nano-particle was used in the composite material that consists of palm oil sludge from the palm oil production and activated sludge
cake from a papermaking process. TiO2
was synthesized by a hydrolysis of titanium isopropoxide. The parameter was investigated by
the mole ratio of reactant to different solvents (isopropanol and isobutanol). The solution was prepared by adjusting pH to acid
solution, resulting in different sizes and distributions of precipitate which was heated at different temperatures.