Table 1: Chemical compositions and characteristics of diatomite and nano-TiO2 immobilized on diatomite.

DiatomiteNano-TiO2 immobilized on diatomite

Chemical compositionsMain: SiO2Main: SiO2 TiO2
Other: Al2O3 Fe2O3 CaO MgO K2O Na2O and other organic substancesOther: Al2O3 Fe2O3 CaO MgO K2O Na2O and other organic substances

CharacteristicsGrain size and specific area were 10~100  m and 1.2995 m2/g, respectivelyCrystalline phase of TiO2 was anatase, grain size was 150 nm and cover percent was 75%