| abstract |
A visible light responsive photocatalyst powder excellent in photocatalytic performance and reproducibility thereof is provided. Visible light responsive photocatalyst powder comprises tungsten oxide powder. When the tungsten oxide powder was measured by the X-ray diffraction method, (1) peak A (2θ = 22.8 to 23.4?), Peak B (2θ = 23.4 to 23.8?), Peak C (2θ = 24.0 to 24.25?) And the intensity ratio of peak D (2θ = 24.25 to 24.5?), A / D ratio and B / D ratio are 0.5 to 2.0, C / D ratio is 0.04 to 2.5, (2) intensity ratio of peak E (2θ = 33.85 to 34.05 degrees) and peak F (2θ = 34.05 to 34.25?) (E / F) is 0.1 to 2.0, (3) the intensity ratio (G / H) of the peak G (2θ = 49.1 to 49.7?) And the peak H (2θ = 49.7 to 50.3?) ) Is 0.04 to 2.0 and has a BET specific surface area in the range of 1.5 to 820 m 2 / g. [Selection] Figure 6 |