Screening Out Reactivity-Promoting Candidates for γ-Ca2SiO4 Carbonation by First-Principles Calculations

Yong Tao, Yuandong Mu, Wenqin Zhang, Fazhou Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

γ-Ca2SiO4 as a promising carbonation-activated cementitious material features an attractive capacity of carbon sequestration. Improving the carbonation reactivity of γ-Ca2SiO4 is of great significance for its practical application. In this paper, first-principles calculations are performed to single out the potential candidates for carbonation activation from a series of dopants. Electronic structure analyses reveal that the carbonation reactivity is related to the reactive site distribution and the binding strength of γ-Ca2SiO4 crystal. Ba, P, and F elements are found to decrease the overall binding strength of γ-Ca2SiO4 crystal, which benefits the dissolution of ions from the crystal to take part in the carbonation reactions. The theoretical conjectures are validated by designed and previous experiments, which confirms the first-principles-based method to effectively guide our experimental investigation.

Original languageEnglish
Article number299
JournalFrontiers in Materials
Volume7
DOIs
Publication statusPublished - 8 Sept 2020
Externally publishedYes

Keywords

  • carbonation
  • electronic structure
  • first-principles
  • reactivity
  • γ-dicalcium silicate

ASJC Scopus subject areas

  • Materials Science (miscellaneous)

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