Synthesis and CO2 Photoreduction of Lead-Free Cesium Bismuth Halide Perovskite Nanocrystals

• DOI: 10.1021/acs.jpcc.1c05110
• Publication Date: 2021-08-15T19:08:37Z
• Authors: Daofu Wu; Xusheng Zhao; Yanyi Huang; Junan Lai; Jiayu Yang; Changqing Tian; Peng He; Qiang Huang; Xiaosheng Tang
• Keywords: Bismuth

The photoreduction of CO2 into renewable fuels is a promising approach to solve the global energy and environmental crisis. All-inorganic bismuth (Bi) halide perovskite nanocrystals (NCs) have emerged as an appealing photocatalyst for visible-light-driven reduction, but they still low photocatalytic activity. Herein, set lead-free stable Cs3Bi2X9 (X = Cl, Cl0.5Br0.5, Br, Br0.5I0.5, I) NCs were explored reduction CO at gas–solid interface. In all recorded NCs, as-synthesized Cs3Bi2(Br0.5I0.5)9 showed highest efficiency CO2-to-CO conversion producing 54 μmol g–1 yield under visible-light irradiation 3 h. strategy we proposed may bring up new opportunities efficient NCs.