Phase transformation and room temperature stabilization of various Bi<sub>2</sub>O<sub>3</sub> nano-polymorphs: effect of oxygen-vacancy defects and reduced surface energy due to adsorbed carbon species
Ashish Chhaganlal Gandhi, Chi-Yuan Lai, Kuan‐Ting Wu, P. V. R. K. Ramacharyulu, Valmiki B. Koli, Chia‐Liang Cheng, Shyue‐Chu Ke, Sheng Yun Wu
Abstract
The air annealing induced grain growth from nano to microscale and a transformation sequence from Bi → β-Bi<sub>2</sub>O<sub>3</sub> → γ-Bi<sub>2</sub>O<sub>3</sub> → α-Bi<sub>2</sub>O<sub>3</sub> was evident. All the annealed samples are oxygen-deficient, resulting in the appearance of a strong red emission band.
Topics & Concepts
Annealing (glass)Materials scienceVacancy defectOxygenNano-Analytical Chemistry (journal)AdsorptionCarbon fibersCrystallographyPhysical chemistryChemistryMetallurgyComposite numberComposite materialOrganic chemistryChromatographyElectronic and Structural Properties of OxidesCatalytic Processes in Materials ScienceGas Sensing Nanomaterials and Sensors