Semiconductor-based photocatalysis is considered one of the most promising strategies to rationally utilize solar energy for resolving energy and environmental issues, and has drawn extensive attention in a wide range of applications. As an emerging and promising layered material, bismuth oxyhalides (BiOX (X= Cl, Br, I)) have triggered considerable interests in the field of photocatalysis due to their good photocatalytic activity toward degradation of various organic pollutants under illumination with UV or/and visible light, as well as the improved photochemical stability. Additionally, some bismuth oxyhalides with non-stoichiometric ratios have been developed to tailor the band structure of BiOX compounds to further improve the photocatalytic performance. In particular, Bi12O17Cl2 has demonstrated enhanced photocatalytic activities for water purification and CO2 reduction under visible light irradiation. However, the rapid recombination of photogenerated electron-hole pairs limits the widespread application. To address this issue, we report the design of a novel Bi12O17Cl2-based heterojunction composite that takes advantage of the matched band energy structures between two semiconductors, which facilitates the separation of photoinduced charge carriers. The formation of heterojunction structure greatly improved the photocatalytic efficiency compared to bare Bi12O17Cl2 under a wide range of light irradiation. This presentation will focus on materials synthesis, characterization and photocatalytic activity evaluation.

Novel bismuth oxyhalides-based hybrid materials with improved photocatalytic performance

2019 Fall National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.