【摘 要】
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Paratungstate-loaded titania catalysts were prepared via the addition of a series of aqueous solutions of paratungstate(denoted as W7) into an isopropanol solut
【机 构】
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Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Institute of Polyoxometalate
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Paratungstate-loaded titania catalysts were prepared via the addition of a series of aqueous solutions of paratungstate(denoted as W7) into an isopropanol solution of Ti[OCH(CH3)2]4 by means of the sol-gel method. The catalysts were characterized by EDX, BET, FTIR, UV-Vis DRS, XRD and the results indicate that such paratungstate-loaded catalysts maintained their heptatungstate structure in the anatase titania matrix up to 400 ℃. The catalysts were tested for the heterogeneous photodegradation of chlorobenzene in aqueous media and showed a better catalytic activity than P-25 TiO2 because paratungstate can prevent the recombination of the holes and electrons produced during irradiation. Moreover, the paratungstate-loaded titania catalysts can resist the disaggregation during the photoirradiation and can be easily recycled from the aqueous suspensions after reactions.
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