Abstract
The photocatalytic activity of WO3 compounded TiO2 (WO3-TiO2) for the reaction of splitting water into O2 is studied using ultraviolet lamp as light source and Fe3+ as electron acceptor. Results indicate that proper quantities of WO3 compounding can improve the photocatalytic activity of TiO2 obviously. The optimum concentration of compounded WO3 is 2%. The maximum speed of O2 evolution for the catalyst 2% WO3-TiO2 is 420 μmol·L−1·h−1. The catalyst WO3-TiO2 can be regenerated for 3 times with no significantly loss of catalytic activity. The most suitable concentration of Fe3+ is 14 · 10−3 mol·L−1, and the most favorable second calcined temperature is 873 K for 2% WO3-TiO2 photocatalyst. The influence of concentration of Fe3+ and the second calcined temperature for photo-catalytic activity of WO3-TiO2 are also discussed.
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