Abstract
Preparation of H3PW12O40–TiO2/bentonite, a new photocatalytic composite material used in wastewater treatment, by a sol–gel and intercalation process has been investigated. Effects of most significant parameters in the manufacturing process on the photocatalytic activity of H3PW12O40–TiO2/bentonite were explored. The optimum values of parameters were as follows: calcination temperature was 200°C; mass ratio of TiO2 to bentonite () was 1:1; molar ratio of H3PW12O40 to TiO2 (MHPW/MTiO2) was 0.5:100; and intercalation time was 3 h. H3PW12O40–TiO2/bentonite had good photon absorption performance and high photocatalytic activity. The possible mechanism of enhanced photocatalytic activity of H3PW12O40–TiO2/bentonite in wastewater treatment was proposed.
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