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Control of nitrogen doping in NaTaO 3 synthesized by hydrothermal reaction and chemical state of nitrogen
Author(s) -
Ozawa Akiyo,
Kobayashi Keita,
Yoshida Tomoko
Publication year - 2019
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6556
Subject(s) - photocurrent , nitrogen , hydrothermal circulation , absorbance , aqueous solution , irradiation , visible spectrum , doping , materials science , absorption (acoustics) , inorganic chemistry , chemistry , nuclear chemistry , photochemistry , chemical engineering , optoelectronics , physics , chromatography , nuclear physics , composite material , organic chemistry , engineering
Nitrogen‐doped NaTaO 3 was synthesized through 1‐pot reaction, hydrothermal process using Ta 3 N 5 as precursor. Changing concentration and amount of NaOH aqueous solution influenced nitrogen content in NaTaO 3 . Absorption edge of nitrogen‐doped NaTaO 3 was extended at 570 nm, and absorbance in visible light region depended on nitrogen content in NaTaO 3 . Anodic photocurrent measured under visible light irradiation became larger with increasing nitrogen content in NaTaO 3‐ x N y . 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.