Control of nitrogen doping in NaTaO3 synthesized by hydrothermal reaction and chemical state of nitrogen. (13th September 2018)

• Record Type: Journal Article
• Authors: Ozawa, Akiyo; Kobayashi, Keita; Yoshida, Tomoko
• Is Part Of: Surface and interface analysis. Volume 51:Number 1(2019)
• Page Start: 89
• Page End: 94
• Publication Date: 2018-09-13
• Subjects: Surfaces (Physics) -- Periodicals; Surface chemistry -- Periodicals; Thin films -- Periodicals; 541.33
• DOI: 10.1002/sia.6556
• Languages: English
• ISSNs: 0142-2421

Abstract

Abstract : Nitrogen‐doped NaTaO3 was synthesized through 1‐pot reaction, hydrothermal process using Ta3 N5 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‐ 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.