Topochemical transformation of low-energy crystal facets to high-energy facets: a case from Bi2O2CO3 {001} facets to β-Bi2O3 {001} facets with improved photocatalytic oxidation of NO

Abstract

Herein, β-Bi₂O₃ nanosheets exposed with active {001} facets were facilely prepared through annealing Bi₂O₂CO₃ with thermally stable {001} facets. The enhanced photocatalytic activity of β-Bi₂O₃ was ascribed to the high energy of {001} facets and the efficient charge separation. This 2D surface transformation strategy could shed new light on the fabrication of energetic facets and the development of highly active photocatalysts.