Flame Aerosol Synthesis of Metal Sulfides at High Temperature in Oxygen‐Lean Atmosphere
Suman Pokhrel, Jakob Stahl, Jan Derk Groeneveld, Marco Schowalter, Andreas Rosenauer, Johannes Birkenstock, Lutz Mädler
Abstract
Abstract The development of a novel reactive spray technology based on the well‐known gas‐phase metal oxide synthesis route provides innumerable opportunities for the production of non‐oxide nanoparticles. Among these materials, metal sulfides are expected to have a high impact, especially in the development of electrochemical and photochemical high‐surface‐area materials. As a proof‐of‐principle, MnS, CoS, Cu 2 S, ZnS, Ag 2 S, In 2 S 3 , SnS, and Bi 2 S 3 are synthesized in an O 2 ‐lean and sulfur‐rich environment. In addition, the formation of Cu 2 S in a single‐droplet combustion experiment is reported. The multiscale approach combining flame sprays with single‐droplet combustion is expected to pave the way toward a fundamental understanding of the gas‐phase formation of metal sulfides in the future. The knowledge acquired can open the possibility for the development of a next‐generation gas‐phase technology facilitating the scalable synthesis of functional binary/ternary metal sulfides.