In‐Situ Monitoring of the Production of Solid Particle‐Stabilised Emulsions under Dynamic Conditions

Abstract

Core-shell pore structures are materials where in a single particle a porous core is surrounded by a shell of another pore size distribution. These could be either a microporous shell on a mesoporous support or the opposite structure. An approach to synthesize those materials based on carbide-derived carbons is presented [1, 2]. The synthesis was carried out in two steps: shell structure and core structure synthesis. In the shell preparation, carbide or NiCl 2 -impregnated carbide were converted partially with chlorine at a set temperature. In the second step, the remaining carbide core or impregnated remaining carbide core was further extracted with chlorine at a different temperature. The partially prepared and fully converted materials were characterized by N 2 and CO 2 sorption, XRD, Raman spectroscopy, and TEM. The characterization showed porous carbon shells covering an unreacted carbide core proving the successful partial conversion. The final core-shell powder exhibits a pore size distribution which is a bimodal mixture of the core and the shell materials. The results also indicate that the catalyst and catalyst loading has a strong influence both for pore structure and carbon structure of the resulting core-shell materials.[