Semiconductor Photocatalytic Material: WO3 Nanomaterial

As a semiconductor photocatalytic material, WO3 nanomaterial can be prepared using amorphous peroxo-tungstic acid for the degradation of various organic compounds. The experts have investigated the photocatalytic activity and physical properties on WO3 photocatalysts prepared by various methods.

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The results showed that WO3 photocatalyst prepared from aged amorphous peroxo-tungstic acid has the highest activity for hexane degradation, which was ∼6 times higher than that of commercial WO3, and exhibited a strong absorption in visible light region. WO3 photocatalyst loaded with CuO as co-catalyst showed a high activity for the complete oxidation of various organic compounds into CO2, as compared with the activities of commercial or homemade WO3 catalysts and N-doped TiO2. The high activity of WO3 photocatalyst was explained by high surface area, good crystallinity, and efficient light absorption in visible light region. The light absorption of WO3 photocatalyst powder was probably improved because of a decrease in surface reflection at the smooth and porous surface of WO3 photocatalyst and because of its increased light path length. In a word, WO3 nanomaterial is a semiconductor photocatalytic material that is promising in degrading various organic compounds.

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