Exploring the self-redox reaction mechanism of Mn-doped Mg2(Ti/Sn)O4 with its precise dopant position
Source abstract
Abstract
Abstract Herein we report an isostructural solid solution of Mg2(Ti1-xSnx)O4:0.002Mn (0 ≤ x ≤ 1) in which cation substitution leads to the presence of two different Mn luminescence centers. When Mn sources of different valance states (MnCO3/MnO2/Mn3O4) were introduced into Mg2TiO4, the self-redox reaction of MnCO3 occurred in air that can be proved by experimental results, from Mn2+→ Mn4+→ Mn3+ and eventually Mn3O4 can be obtained. Low valance state Mn2+/3+ ions in Mn3O4 can be further oxidized to Mn4+ ions by O2 in Mg2TiO4:Mn. Mn4+ red emission can be observed along with oxygen defects-induced blue emission in Mg2(Ti1-xSnx)O4:Mn (0 ≤ x V o • ) to Mn3+. This is the first time that compositional-tunability that induces Mn ions of different valance states luminescent behaviors and further interprets its spectral transition mechanism.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Nuclear materials and radiation effects · Electronic and Structural Properties of Oxides
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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