Semiconductor/Covalent‐Organic‐Framework Z‐Scheme Heterojunctions for Artificial Photosynthesis

Abstract A strategy to covalently connect crystalline covalent organic frameworks (COFs) with semiconductors to create stable organic–inorganic Z‐scheme heterojunctions for artificial photosynthesis is presented. A series of COF–semiconductor Z‐scheme photocatalysts combining water‐oxidation semiconductors (TiO 2 , Bi 2 WO 6 , and α‐Fe 2 O 3 ) with CO 2 reduction COFs (COF‐316/318) was synthesized and exhibited high photocatalytic CO 2 ‐to‐CO conversion efficiencies (up to 69.67 μmol g −1 h −1 ), with H 2 O as the electron donor in the gas–solid CO 2 reduction, without additional photosensitizers and sacrificial agents. This is the first report of covalently bonded COF/inorganic‐semiconductor systems utilizing…

• NN
  National Natural Science Foundation of China

  Awards: 21871141, 21901122, 21871142, 21701085
• CP
  China Postdoctoral Science Foundation

  Awards: 2018M630572, 2019M651873
• NS
  Natural Science Research of Jiangsu Higher Education Institutions of China

  Awards: 17KJB150025, 19KJB150011