Embedding Pd into SnO₂ drastically enhances gas sensing.

ABSTRACT: Combustion aerosol processes can uniquely embed noble metals into semiconducting particles. Here, monocrystalline SnO₂ particles embedded with Pd and/or PdO_x were made by flame spray pyrolysis (FSP) of appropriate precursors through microexplosions by droplet-to-particle conversion as the crystal size was proportional to the cube root of precursor solution concentration, C. These particles were air-annealed and leached with nitric acid for removal of metallic Pd from their surface. The SnO₂ crystal size varied from 11 to 24 nm and was in close agreement with the primary particle size determined by nitrogen adsorption. The embedded fraction of Pd ranged from about 30 to 80% of the nominal Pd-content. This was achieved by judiciously varying the

SUBMITTER: Jablczynska K 

PROVIDER: S-EPMC10863718 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature