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Efficient charge transport and separation in Z-scheme CuPc/Bi2WO6 for enhanced photocatalytic CO2 reduction

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2025, 35(5), pp.2239~2252
  • DOI : 10.1007/s42823-025-00919-1
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : February 12, 2025
  • Accepted : May 4, 2025
  • Published : December 11, 2025

Hu Zi 1 Meng Jundong 1 Xu Xinyuan 1 Chen Liuyun 1 Luo Xuan 1 Xie Xinling 1 Qin Zuzeng 1 Su Tongming 1

1Guangxi University

Accredited

ABSTRACT

Combining CuPc with semiconductor materials as organic‒inorganic hybrid photocatalysts can effectively improve the light absorption capacity and separation efficiency of photogenerated electrons and holes in semiconductor photocatalysts. Herein, a CuPc/Bi2WO6 Z-scheme heterojunction was successfully designed and used for CO2 photoreduction. The separation of photogenerated electrons and holes is greatly enhanced because of the formation of a compact organic‒inorganic heterointerface and the built-in electric field between CuPc and Bi2WO6, which increases the photocatalytic CO2 reduction efficiency. Moreover, the photosensitizer CuPc can effectively enhance the light absorption of Bi2WO6. The optimal 1CuPc/Bi2WO6 composite exhibits the best photocatalytic performance, with a CO production rate of 2.95 µmol g−l h−1, which is three times greater than that of Bi2WO6 under visible-light irradiation. This work provides a new idea for the construction of an organic‒inorganic photocatalytic system for CO2 reduction.

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