Tunable Synthesis of 2D Bismuth Oxyhydroxide and Oxysulfide from Solid-Liquid Interfacial Reaction for High Performance Optoelectronic Gas Sensing.

ABSTRACT: The self-limiting Cabrera-Mott oxidation reaction on metal surfaces provides an effective pathway for synthesizing atomically thin 2D metal oxide. Inspired by this reaction, it is proposed that solid bismuth metals can react with dissolved oxygen and water molecules in an aqueous environment, forming an ultrathin oxyhydroxide layer on their surfaces. The lattice mismatch between the surface oxyhydroxide layer and the underlying pure metal enables the mechanical exfoliation of detached 2D oxyhydroxide nanosheets. Moreover, the sulfurization interaction between the oxyhydroxide and dissolved H₂S expands the applicability of solid-liquid interfacial reactions for realizing 2D bismuth oxysulfide, effectively tuning their electronic bandgap energy, work function, and band position. G

SUBMITTER: Tang T 

PROVIDER: S-EPMC12036554 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature