Carbonate-assisted transformation of manganese silicate nanoparticles via solid-to-hollow structural transition

The bubble-like manganese silicate nanoparticles with a diameter of-10 nm have attracted much attention in diverse applications, however their formation mechanisms are under debate. Herein, we revisit the formation of bubble-like manganese silicate nanoparticles and demonstrate a solid-to-hollow conversion process. The solid MnxOy(CO3)mSiz as an intermediate is formed during hydrothermal reaction. The thermal decomposition of MnxOy(CO3)mSiz leads to the solid to hollow structure transformation. Finally, bubble-like manganese silicate nanoparticles are formed. These findings are expected to provide insights in designing other hollow metal silicate nanoparticles.

Automated summary

Bubble-like manganese silicate nanoparticles have attracted much attention due to their wide range of applications, but there is still debate over their formation mechanisms. In this study, we revisit the formation of these nanoparticles and demonstrate a solid-to-hollow conversion process. An intermediate solid MnxOy(CO3)mSiz is formed during the hydrothermal reaction, and its thermal decomposition leads to the transformation from solid to hollow structure. Finally, bubble-like manganese silicate nanoparticles are formed. These findings are expected to provide insights for designing other hollow metal silicate nanoparticles.