Photocatalytic Activity of NaNbO3 Thin Films

NaNbO3 thin films prepared by the sol-gel method had homogeneous microstructure with an average grain size of 15-25 nm and exhibited photoinduced hydrophilic conversion under UV irradiation. However, the films had little photocatalytic oxidation activity under UV irradiation. This is the first observation that NaNbO3 undergoes photoinduced hydrophiticity under UV irradiation.