Converting Organic Wastewater into CO Using MOFs-Derived Co/In₂O₃ Double-Shell Photocatalyst
2021
Liang, Qian | Zhao, Shuang | Li, Zhongyu | Goh, Sao-Ee Charles | Shi, Hong | Huang, Hui | Kang, Zhenhui
The photocatalytic conversion of organic wastewater into value-added chemicals is a promising strategy to solve the environmental issue and energy crisis. Herein, Co/In₂O₃ nanotubes with a double-shell structure, as a highly efficient photocatalyst, are synthesized by a one-step calcination method. The Co/In₂O₃ heterostructure shows an outstanding photocatalytic CO₂ reduction performance of 4902 μmol h–¹ g–¹. Notably, these Co/In₂O₃ photocatalysts also achieve CO₂ self-generation and in situ reduction conversion in acid organic wastewater (phenol solution), in which the high CO₂ (47.5 μmol h–¹ g–¹) and CO (0.9 μmol h–¹ g–¹) evolution rates are demonstrated under solar irradiation. Transient photovoltage (TPV) tests demonstrate that Co nanoparticles on Co/In₂O₃ double-shell heterostructure serve as the CO₂ reduction sites for the effective capture and stabilization of the photogenerated electrons.
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