Structural and Enhanced Optical Properties of Stabilized γ‒Bi2O3 Nanoparticles: Effect of Oxygen Ion Vacancies

We report the synthesis of room temperature (RT) stabilized γ–Bi2O3 nanoparticles (NPs) at the expense of metallic Bi NPs through annealing in an ambient atmosphere. RT stability of the metastable γ–Bi2O3 NPs...

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Main Authors:	Ashish Chhaganlal Gandhi, Chia-Liang Cheng, Sheng Yun Wu
Format:	Article
Language:	English
Published:	MDPI AG 2020-05-01
Series:	Nanomaterials
Subjects:	γ–Bi2O3 nanoparticles metastable Raman scattering x-ray diffraction oxygen vacancies
Online Access:	https://www.mdpi.com/2079-4991/10/6/1023

id	doaj-d6a60b1ef28c4c75bf5976b8a097c9de
record_format	Article
spelling	doaj-d6a60b1ef28c4c75bf5976b8a097c9de2020-11-25T03:01:01ZengMDPI AGNanomaterials2079-49912020-05-01101023102310.3390/nano10061023Structural and Enhanced Optical Properties of Stabilized γ‒Bi<sub>2</sub>O<sub>3 </sub>Nanoparticles: Effect of Oxygen Ion VacanciesAshish Chhaganlal Gandhi0Chia-Liang Cheng1Sheng Yun Wu2Department of Physics, National Dong Hwa University, Hualien 97401, TaiwanDepartment of Physics, National Dong Hwa University, Hualien 97401, TaiwanDepartment of Physics, National Dong Hwa University, Hualien 97401, TaiwanWe report the synthesis of room temperature (RT) stabilized γ–Bi<sub>2</sub>O<sub>3</sub> nanoparticles (NPs) at the expense of metallic Bi NPs through annealing in an ambient atmosphere. RT stability of the metastable γ–Bi<sub>2</sub>O<sub>3</sub> NPs is confirmed using synchrotron radiation powder X-ray diffraction and Raman spectroscopy. γ–Bi<sub>2</sub>O<sub>3</sub> NPs exhibited a strong red-band emission peaking at ~701 nm, covering 81% integrated intensity of photoluminescence spectra. Our findings suggest that the RT stabilization and enhanced red-band emission of γ‒Bi<sub>2</sub>O<sub>3</sub> is mediated by excess oxygen ion vacancies generated at the octahedral O(2) sites during the annealing process.https://www.mdpi.com/2079-4991/10/6/1023γ–Bi2O3nanoparticlesmetastableRaman scatteringx-ray diffractionoxygen vacancies
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Ashish Chhaganlal Gandhi Chia-Liang Cheng Sheng Yun Wu
spellingShingle	Ashish Chhaganlal Gandhi Chia-Liang Cheng Sheng Yun Wu Structural and Enhanced Optical Properties of Stabilized γ‒Bi<sub>2</sub>O<sub>3 </sub>Nanoparticles: Effect of Oxygen Ion Vacancies Nanomaterials γ–Bi2O3 nanoparticles metastable Raman scattering x-ray diffraction oxygen vacancies
author_facet	Ashish Chhaganlal Gandhi Chia-Liang Cheng Sheng Yun Wu
author_sort	Ashish Chhaganlal Gandhi
title	Structural and Enhanced Optical Properties of Stabilized γ‒Bi<sub>2</sub>O<sub>3 </sub>Nanoparticles: Effect of Oxygen Ion Vacancies
title_short	Structural and Enhanced Optical Properties of Stabilized γ‒Bi<sub>2</sub>O<sub>3 </sub>Nanoparticles: Effect of Oxygen Ion Vacancies
title_full	Structural and Enhanced Optical Properties of Stabilized γ‒Bi<sub>2</sub>O<sub>3 </sub>Nanoparticles: Effect of Oxygen Ion Vacancies
title_fullStr	Structural and Enhanced Optical Properties of Stabilized γ‒Bi<sub>2</sub>O<sub>3 </sub>Nanoparticles: Effect of Oxygen Ion Vacancies
title_full_unstemmed	Structural and Enhanced Optical Properties of Stabilized γ‒Bi<sub>2</sub>O<sub>3 </sub>Nanoparticles: Effect of Oxygen Ion Vacancies
title_sort	structural and enhanced optical properties of stabilized γ‒bi<sub>2</sub>o<sub>3 </sub>nanoparticles: effect of oxygen ion vacancies
publisher	MDPI AG
series	Nanomaterials
issn	2079-4991
publishDate	2020-05-01
description	We report the synthesis of room temperature (RT) stabilized γ–Bi<sub>2</sub>O<sub>3</sub> nanoparticles (NPs) at the expense of metallic Bi NPs through annealing in an ambient atmosphere. RT stability of the metastable γ–Bi<sub>2</sub>O<sub>3</sub> NPs is confirmed using synchrotron radiation powder X-ray diffraction and Raman spectroscopy. γ–Bi<sub>2</sub>O<sub>3</sub> NPs exhibited a strong red-band emission peaking at ~701 nm, covering 81% integrated intensity of photoluminescence spectra. Our findings suggest that the RT stabilization and enhanced red-band emission of γ‒Bi<sub>2</sub>O<sub>3</sub> is mediated by excess oxygen ion vacancies generated at the octahedral O(2) sites during the annealing process.
topic	γ–Bi2O3 nanoparticles metastable Raman scattering x-ray diffraction oxygen vacancies
url	https://www.mdpi.com/2079-4991/10/6/1023
work_keys_str_mv	AT ashishchhaganlalgandhi structuralandenhancedopticalpropertiesofstabilizedgbisub2subosub3subnanoparticleseffectofoxygenionvacancies AT chialiangcheng structuralandenhancedopticalpropertiesofstabilizedgbisub2subosub3subnanoparticleseffectofoxygenionvacancies AT shengyunwu structuralandenhancedopticalpropertiesofstabilizedgbisub2subosub3subnanoparticleseffectofoxygenionvacancies
_version_	1724695332120428544

Structural and Enhanced Optical Properties of Stabilized γ‒Bi<sub>2</sub>O<sub>3 </sub>Nanoparticles: Effect of Oxygen Ion Vacancies

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