Highly Efficient Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> Single-Crystal Lamellas with Dominantly Exposed {001} Facets

Herein we report the Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> single-crystal nanoplates with dominant {001} exposing facets fabricated via a controllable hydrothermal means. Exposed {001} reactive facets enable BOC-001 nanoplates efficient separation and migration of photoinduced electron–hole pairs, thereby resulting in highly enhanced photoreactivity pertaining to rhodamine B degradation, NO removal, and photocurrent generation. The present work provides a new reference for manipulation of facet-dependent photocatalytic activity of semiconductors.