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The N-doped NaNbO 3 samples sensitized by carbon nitrides are synthesized via heating the mixture of NaNbO 3 powders and urea at different weight ratios, and their photocatalytic activities are evaluated by the photodegradation of Rhodamine B under full arc Xe lamp irradiation. These samples are characterized by X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, UV−vis diffuse reflectance spectroscopy and scanning electron microscope. These investigations reveal that the samples contain N-doped NaNbO 3 and sensitizer of carbon nitride. In comparison with pristine NaNbO 3, the sample prepared at the weight ratio of NaNbO 3 to urea of 1:60 shows a significantly enhanced photocatalytic activity. These results demonstrate that the metal-free carbon nitride could work as a photosensitizer, leading to an enhancement of photocatalytic activity due to the more light harvesting and efficient electron transfer between the N-doped NaNbO 3 and carbon nitride.
Li et al. (Wed,) studied this question.