Tungsten Trioxide Photocatalytic Performance (2)

Compare APT and H2WO4 as raw material producing tungsten trioxide (WO3-X) photocatalyst found that different performance WO3-X photocatalyst produce by different materials. After further studies found that different performance WO3-X photocatalyst obtained from different producing methods.

Using solid phase method and the H2WO4 as raw material the production of WO3-X photocatalyst are monoclinic.  Photocatalytic performance influence by temperature was very little. And there have been sixty thousand phase and orthorhombic in the WO3-X which is produced by hydrothermal synthesis method. Oxygen index is 2.50 and photocatalytic performance has been greatly improved. The product of hydrothermal synthesis method 24 hours reaction has highest rate of photolysis. At 365nm ultraviolet light, oxygen production rate arrive at 140umol / L / h O2. However, hydrothermal method, with the reaction temperature, the raw material has undergone transformation which is orthogonal WO3-X • 0.33H2O → sixty thousand WO3-X → monoclinic WO3-X's. Photocatalytic performance will continue to reduce when the WO3-X sixty phase content continue to reduce.

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