Related Experiment Video
Updated: Feb 9, 2026

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles
Published on: November 27, 2015
β-Na2TeO4: Phase Transition from an Orthorhombic to a Monoclinic Form. Reversible CO2 Capture
Cyrille Galven1, Thierry Pagnier2, Noël Rosman2
1Institut des Molécules et Matériaux du Mans (IMMM), UMR CNRS 6283 , Le Mans Université , Avenue Olivier Messiaen , 72085 Le Mans CEDEX 9 , France.
Abstract:
The present work concerns the tellurate Na2TeO4 which has a 1D structure and could then present a CO2 capture ability. It has been synthesized in a powder form via a solid-state reaction and structurally characterized by thermal X-ray diffraction experiments, Raman spectroscopy, and differential scanning calorimetry. The room temperature structure corresponds to the β-Na2TeO4 orthorhombic form, and we show that it undergoes a reversible structural transition near 420 °C toward a monoclinic system. Ab initio computations were also performed on the room temperature structure, the Raman vibration modes calculated, and a normal mode attribution proposed. In agreement with our expectations, this sodium oxide is able to trap CO2 by a two-step mechanism: Na+/H+ exchange and carbonation of the released sodium as NaHCO3. This capture is reversible since CO2 can be released upon heating by recombination of the mother phase.
More Related Videos
Related Concept Videos
Phase Transitions
Phase Transitions: Melting and Freezing
Phase Transitions: Sublimation and Deposition
Phase Transitions: Vaporization and Condensation
Phase Diagrams
Cooperative Allosteric Transitions

