Synthesis of NiO/Bi2O3 composite nanosheets and their photocatalytic CO2 reduction performance

Abstract

The development of catalysts for photocatalytic reduction of CO₂ is of great significance for addressing the excessive emission of CO₂. In this study, we designed and synthesized a series of NiO/Bi₂O₃ composite nanoflakes and used them for photocatalytic CO₂ reduction. Among them, Ni/Bi-30 exhibits the best CO₂ reduction activity with a CO generation rate of 10.2 μmol g⁻¹ h⁻¹ and a selectivity of 100%. The mechanism study indicates that the Z-type heterojunction formed between NiO and Bi₂O₃ promotes the separation of photogenerated carriers and enhances the photocatalytic effect.