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Time-of-flight secondary ion mass spectrometry study of zinc carbonation in the presence of stable oxygen-18 and deuterium isotopes

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Article number123673
Number of pages7
JournalMaterials Chemistry and Physics
Volume256
DOIs
Publication statusPublished - 2020
Publication typeA1 Journal article-refereed

Abstract

Zinc foil was carbonated in supercritical CO2 in the presence of water containing stable 18O or deuterium isotopes. The carbonation resulted in precipitation of zinc carbonate crystals with hexagonal and cubic morphologies until the source of hydroxyl groups was depleted. Time-of-flight secondary ion mass spectrometry was utilized to map the isotopes in the precipitates. The isotopes were detected in the precipitated structures, which confirms the formation of carbonic acid as the initial corrosion procedure step, followed by zinc dissolution. This finally leads to the arrangement of zinc ions with carbonate ions, and storage of OH-groups between ZnCO3 layers as Zn(OH)2 or molecular water. The results completed chemical composition data obtained with molecular spectroscopy. Mapping of the distribution of hydrogen and oxygen isotopes by ToF-SIMS provided essential information on the reaction routes of carbonation in a humid scCO2 environment.

Keywords

  • O-water, Deuterium, Supercritical carbon dioxide, ToF-SIMS, Zinc foil

Publication forum classification

Field of science, Statistics Finland