The photocatalytic properties of nanosized TiO2/diatomite composites were studied with acid red 3R as waste water under solar light irradiation of 91700 uw/cm2 and ultraviolet irradiation of 499 uw/cm2. It was explored the best condition for nano TiO2 / diatomite composite material preparation in the experiment. The samples were characterized by SEM, XRD, EDS and IR analysis. The effect of pH, illumination time, and initial concentration of dye on catalytic performance were also investigated in detail. It showed that the best results was refluxed under acidic conditions for 75min, refluxed under neutral conditions 2h, TiO2 and diatomite material ratio 1:3 photocatalytic composite obtained. It can be found that the composite material exhibited better performance with longer illumination time and lower concentration of dye when the pH value of the solution was fixed at 3.
DING Shiwen
,
Liu Tao
,
Li Tong
,
Guo Yang
. Preparation and properties of nano titanium dioxide/diatomite composite materials[J]. Journal of Hebei University(Natural Science Edition), 2015
, 35(1)
: 27
-33
.
DOI: 10.3969/j.issn.1000-1565.2015.01.006
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