The photocatalyst was fabricated by depositing the tungsten clusters over the -type perovskite base material with the chemical vapor deposition method, and later partly oxidizing the surfaces of these clusters to obtain -type overlayers and W metal layer as an Ohmic junction. This NCPC showed unprecedented high activity for the photocatalytic oxidation of water, photocurrent generation, and acetaldehyde decomposition under visible light irradiation .
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