Spontaneously formed gradient chemical compositional structures of niobium doped titanium dioxide nanoparticles enhance ultraviolet- and visible-light photocatalytic performance

Abstract Semiconductor photocatalysts showing excellent performance under irradiation of both ultraviolet (UV)- and visible (VIS)-light are highly demanded towards realization of sustainable energy systems. TiO2 is one of the most common photocatalysts and has been widely investigated as candidate s...

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Autores principales:	Naoki Tarutani, Ryuma Kato, Tetsuo Uchikoshi, Takamasa Ishigaki
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7d88da6b84624ba0a2c0dc6de67ff3c9
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spelling	oai:doaj.org-article:7d88da6b84624ba0a2c0dc6de67ff3c92021-12-02T16:13:47ZSpontaneously formed gradient chemical compositional structures of niobium doped titanium dioxide nanoparticles enhance ultraviolet- and visible-light photocatalytic performance10.1038/s41598-021-94512-x2045-2322https://doaj.org/article/7d88da6b84624ba0a2c0dc6de67ff3c92021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94512-xhttps://doaj.org/toc/2045-2322Abstract Semiconductor photocatalysts showing excellent performance under irradiation of both ultraviolet (UV)- and visible (VIS)-light are highly demanded towards realization of sustainable energy systems. TiO2 is one of the most common photocatalysts and has been widely investigated as candidate showing UV/VIS responsive performance. In this study, we report synthesis of Nb doped TiO2 by environmentally benign mechanochemical reaction. Nb atoms were successfully incorporated into TiO2 lattice by applying mechanical energy. As synthesized Nb doped TiO2 were metastable phase and formed chemical compositional gradient structure of poorly Nb doped TiO2 core and highly Nb doped TiO2 surface after high temperature heat treatment. It was found that formed gradient chemical compositional heterojunctions effectively enhanced photocatalytic performance of Nb doped TiO2 under both of UV- and VIS-light irradiation, which is different trend compared with Nb doped TiO2 prepared through conventional methods. The approach shown here will be employed for versatile systems because of simple and environmentally benign process.Naoki TarutaniRyuma KatoTetsuo UchikoshiTakamasa IshigakiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Naoki Tarutani Ryuma Kato Tetsuo Uchikoshi Takamasa Ishigaki Spontaneously formed gradient chemical compositional structures of niobium doped titanium dioxide nanoparticles enhance ultraviolet- and visible-light photocatalytic performance
description	Abstract Semiconductor photocatalysts showing excellent performance under irradiation of both ultraviolet (UV)- and visible (VIS)-light are highly demanded towards realization of sustainable energy systems. TiO2 is one of the most common photocatalysts and has been widely investigated as candidate showing UV/VIS responsive performance. In this study, we report synthesis of Nb doped TiO2 by environmentally benign mechanochemical reaction. Nb atoms were successfully incorporated into TiO2 lattice by applying mechanical energy. As synthesized Nb doped TiO2 were metastable phase and formed chemical compositional gradient structure of poorly Nb doped TiO2 core and highly Nb doped TiO2 surface after high temperature heat treatment. It was found that formed gradient chemical compositional heterojunctions effectively enhanced photocatalytic performance of Nb doped TiO2 under both of UV- and VIS-light irradiation, which is different trend compared with Nb doped TiO2 prepared through conventional methods. The approach shown here will be employed for versatile systems because of simple and environmentally benign process.
format	article
author	Naoki Tarutani Ryuma Kato Tetsuo Uchikoshi Takamasa Ishigaki
author_facet	Naoki Tarutani Ryuma Kato Tetsuo Uchikoshi Takamasa Ishigaki
author_sort	Naoki Tarutani
title	Spontaneously formed gradient chemical compositional structures of niobium doped titanium dioxide nanoparticles enhance ultraviolet- and visible-light photocatalytic performance
title_short	Spontaneously formed gradient chemical compositional structures of niobium doped titanium dioxide nanoparticles enhance ultraviolet- and visible-light photocatalytic performance
title_full	Spontaneously formed gradient chemical compositional structures of niobium doped titanium dioxide nanoparticles enhance ultraviolet- and visible-light photocatalytic performance
title_fullStr	Spontaneously formed gradient chemical compositional structures of niobium doped titanium dioxide nanoparticles enhance ultraviolet- and visible-light photocatalytic performance
title_full_unstemmed	Spontaneously formed gradient chemical compositional structures of niobium doped titanium dioxide nanoparticles enhance ultraviolet- and visible-light photocatalytic performance
title_sort	spontaneously formed gradient chemical compositional structures of niobium doped titanium dioxide nanoparticles enhance ultraviolet- and visible-light photocatalytic performance
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7d88da6b84624ba0a2c0dc6de67ff3c9
work_keys_str_mv	AT naokitarutani spontaneouslyformedgradientchemicalcompositionalstructuresofniobiumdopedtitaniumdioxidenanoparticlesenhanceultravioletandvisiblelightphotocatalyticperformance AT ryumakato spontaneouslyformedgradientchemicalcompositionalstructuresofniobiumdopedtitaniumdioxidenanoparticlesenhanceultravioletandvisiblelightphotocatalyticperformance AT tetsuouchikoshi spontaneouslyformedgradientchemicalcompositionalstructuresofniobiumdopedtitaniumdioxidenanoparticlesenhanceultravioletandvisiblelightphotocatalyticperformance AT takamasaishigaki spontaneouslyformedgradientchemicalcompositionalstructuresofniobiumdopedtitaniumdioxidenanoparticlesenhanceultravioletandvisiblelightphotocatalyticperformance
_version_	1718384358913474560

Spontaneously formed gradient chemical compositional structures of niobium doped titanium dioxide nanoparticles enhance ultraviolet- and visible-light photocatalytic performance

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