Synthesis of CaCO3@C yolk–shell particles for CO2 adsorption

Abstract

We report the synthesis of CaCO₃@C yolk–shell particles with a microporous carbon shell through a selective etching method. The CaCO₃@C exhibits an enhanced CO₂ adsorption, relative to the porous CaCO₃ nanoparticles or the porous carbon shell, with a capacity of 19.30 cm³ STP g⁻¹ (0.86 mmol g⁻¹ or 31.64 cm³ STP cm⁻³ sorbent) under ambient conditions (23 ± 1 °C and 1 atm CO₂).