Related Experiment Video
Updated: Sep 24, 2025

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
Published on: April 12, 2017
Raman spectroscopy-in situ characterization of reversibly intercalated oxygen vacancies in α-MoO3
Isaías de Castro Silva1, Alice Cosenza Reinaldo1, Fernando Aparecido Sigoli1
1Laboratory of Functional Materials- Institute of Chemistry, University of Campinas - UNICAMP P. O. Box 6154 13083-970 Campinas SP Brazil mazali@unicamp.br.
Abstract:
This work reports on the in situ strategy to reversibly generate or suppress oxygen vacancies on α-MoO3 which were probed by Raman spectroscopy. Reversible changes in two features of the α-MoO3 Raman spectrum could be correlated to the generation of oxygen vacancies: displacement of the T band frequency and the intensity decrease of the symmetrical stretching (ν s) band. These two features could be used to qualitatively describe oxygen vacancies. Raman results also indicate that oxygen vacancies are located in the interlayer region of the α-MoO3 lattice. This observation is corroborated by in situ X-ray diffraction, which also indicates the absence of nonstoichiometric phase transitions.
More Related Videos
11:38In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
Published on: February 1, 2020
10:13A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
Published on: April 28, 2023
Related Concept Videos
Raman Spectroscopy: Overview
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
UV–Vis Spectroscopy: Molecular Electronic Transitions
Raman Spectroscopy Instrumentation: Overview
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
Molecular Spectroscopy: Absorption and Emission
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
UV–Vis Spectroscopy of Conjugated Systems
One of the factors influencing λmax is the extent...