Photocatalytic activity under UV/Visible light range of Nb-doped titanate nanostructures synthesized with Nb oxide

Jong Min Byun; Hye Rim Choi; Young Do Kim; Tohru Sekino; Se Hoon Kim

doi:10.1016/j.apsusc.2016.08.132

Photocatalytic activity under UV/Visible light range of Nb-doped titanate nanostructures synthesized with Nb oxide

Jong Min Byun, Hye Rim Choi, Young Do Kim, Tohru Sekino, Se Hoon Kim

Dept. of Materials Science & Engineering

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

In this work, using economical and stable niobium oxide (Nb ₂ O ₅ ) powder as niobium source, visible light responsive Nb-doped titanate nanostructures were synthesized by hydrothermal process. The synthesized Nb-doped titanate nanostructures were composed of two types of titanate nanostructures (nanotubes and nanosheets) and TiO ₂ nanoparticles. They have a smaller band gap energy of 3.24 eV compared to pure TNTs that were synthesized under the same experimental conditions. The photocatalytic activity of the synthesized Nb-doped titanate nanostructures was evaluated under visible light irradiation through the degradation of methylene blue (MB) and rhodamine B (RhB). Consequently, the synthesized Nb-doped titanate nanostructures exhibited much higher photocatalytic activity under visible light irradiation than pure TNTs. The photocatalytic activity of the synthesized Nb-doped titanate nanostructures was 1.4 times (MB) and 3.1 times (RhB) higher than of pure TNTs because the Nb-doping narrowed the band gap and it accelerated the separation of photo-induced electron-hole pairs.

Original language	English
Pages (from-to)	126-131
Number of pages	6
Journal	Applied Surface Science
Volume	415
DOIs	https://doi.org/10.1016/j.apsusc.2016.08.132
State	Published - 1 Sep 2017

Keywords

Doping
Hydrothermal process
Niobium
Photocatalytic activity
Titanate nanostructures

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10.1016/j.apsusc.2016.08.132

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@article{9480d9e996774cc6ace9445124ed1577,

title = "Photocatalytic activity under UV/Visible light range of Nb-doped titanate nanostructures synthesized with Nb oxide",

abstract = " In this work, using economical and stable niobium oxide (Nb 2 O 5 ) powder as niobium source, visible light responsive Nb-doped titanate nanostructures were synthesized by hydrothermal process. The synthesized Nb-doped titanate nanostructures were composed of two types of titanate nanostructures (nanotubes and nanosheets) and TiO 2 nanoparticles. They have a smaller band gap energy of 3.24 eV compared to pure TNTs that were synthesized under the same experimental conditions. The photocatalytic activity of the synthesized Nb-doped titanate nanostructures was evaluated under visible light irradiation through the degradation of methylene blue (MB) and rhodamine B (RhB). Consequently, the synthesized Nb-doped titanate nanostructures exhibited much higher photocatalytic activity under visible light irradiation than pure TNTs. The photocatalytic activity of the synthesized Nb-doped titanate nanostructures was 1.4 times (MB) and 3.1 times (RhB) higher than of pure TNTs because the Nb-doping narrowed the band gap and it accelerated the separation of photo-induced electron-hole pairs.",

keywords = "Doping, Hydrothermal process, Niobium, Photocatalytic activity, Titanate nanostructures",

author = "Byun, \{Jong Min\} and Choi, \{Hye Rim\} and Kim, \{Young Do\} and Tohru Sekino and Kim, \{Se Hoon\}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

month = sep,

day = "1",

doi = "10.1016/j.apsusc.2016.08.132",

language = "English",

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T1 - Photocatalytic activity under UV/Visible light range of Nb-doped titanate nanostructures synthesized with Nb oxide

AU - Byun, Jong Min

AU - Choi, Hye Rim

AU - Kim, Young Do

AU - Sekino, Tohru

AU - Kim, Se Hoon

PY - 2017/9/1

Y1 - 2017/9/1

N2 - In this work, using economical and stable niobium oxide (Nb 2 O 5 ) powder as niobium source, visible light responsive Nb-doped titanate nanostructures were synthesized by hydrothermal process. The synthesized Nb-doped titanate nanostructures were composed of two types of titanate nanostructures (nanotubes and nanosheets) and TiO 2 nanoparticles. They have a smaller band gap energy of 3.24 eV compared to pure TNTs that were synthesized under the same experimental conditions. The photocatalytic activity of the synthesized Nb-doped titanate nanostructures was evaluated under visible light irradiation through the degradation of methylene blue (MB) and rhodamine B (RhB). Consequently, the synthesized Nb-doped titanate nanostructures exhibited much higher photocatalytic activity under visible light irradiation than pure TNTs. The photocatalytic activity of the synthesized Nb-doped titanate nanostructures was 1.4 times (MB) and 3.1 times (RhB) higher than of pure TNTs because the Nb-doping narrowed the band gap and it accelerated the separation of photo-induced electron-hole pairs.

AB - In this work, using economical and stable niobium oxide (Nb 2 O 5 ) powder as niobium source, visible light responsive Nb-doped titanate nanostructures were synthesized by hydrothermal process. The synthesized Nb-doped titanate nanostructures were composed of two types of titanate nanostructures (nanotubes and nanosheets) and TiO 2 nanoparticles. They have a smaller band gap energy of 3.24 eV compared to pure TNTs that were synthesized under the same experimental conditions. The photocatalytic activity of the synthesized Nb-doped titanate nanostructures was evaluated under visible light irradiation through the degradation of methylene blue (MB) and rhodamine B (RhB). Consequently, the synthesized Nb-doped titanate nanostructures exhibited much higher photocatalytic activity under visible light irradiation than pure TNTs. The photocatalytic activity of the synthesized Nb-doped titanate nanostructures was 1.4 times (MB) and 3.1 times (RhB) higher than of pure TNTs because the Nb-doping narrowed the band gap and it accelerated the separation of photo-induced electron-hole pairs.

KW - Doping

KW - Hydrothermal process

KW - Niobium

KW - Photocatalytic activity

KW - Titanate nanostructures

UR - https://www.scopus.com/pages/publications/84995617539

U2 - 10.1016/j.apsusc.2016.08.132

DO - 10.1016/j.apsusc.2016.08.132

M3 - Article

AN - SCOPUS:84995617539

SN - 0169-4332

VL - 415

SP - 126

EP - 131

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Photocatalytic activity under UV/Visible light range of Nb-doped titanate nanostructures synthesized with Nb oxide

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