Control of nitrogen doping in NaTaO3 synthesized by hydrothermal reaction and chemical state of nitrogen |
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| Authors: | Akiyo Ozawa Keita Kobayashi Tomoko Yoshida |
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| Institution: | 1. Applied Chemistry and Bioengineering, Graduate School of Engineering, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, Japan;2. Corporate Research Laboratories, Research & Development Division, Sakai Chemical Industry, Co., Ltd., 5-1, Ebisujima-cho, Sakai-ku, Sakai, Japan;3. Osaka City University Advanced Research Institute for Natural Science and Technology, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, Japan |
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| Abstract: | Nitrogen-doped NaTaO3 was synthesized through 1-pot reaction, hydrothermal process using Ta3N5 as precursor. Changing concentration and amount of NaOH aqueous solution influenced nitrogen content in NaTaO3. Absorption edge of nitrogen-doped NaTaO3 was extended at 570 nm, and absorbance in visible light region depended on nitrogen content in NaTaO3. Anodic photocurrent measured under visible light irradiation became larger with increasing nitrogen content in NaTaO3-xNy. Under ultraviolet light irradiation (λ ≤ 400 nm), the highest anodic photocurrent was observed when nitrogen concentration was y = 0.024. It was possible to expand the wavelength range that can be effectively utilized for the photoelectrochemical reaction. |
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