What question did this study set out to answer?

The study aims to develop a novel catalyst for the efficient conversion of CO2 into CH4.

January 21, 2026Open Access

A Constructed 2D-Cu2O/Carbon Nitride Heterojunction for Efficient CO2 Photoreduction to CH4

JLJialiang LiuNingbo University XZXiaoxuan ZhangChina University of Geosciences (Beijing)JGJiaxuan GaoChina University of Geosciences (Beijing)

Puntos clave

The study aims to develop a novel catalyst for the efficient conversion of CO2 into CH4.
Preparation of a 2D-Cu2O/carbon nitride heterojunction catalyst.
Assessment of light absorption capacity and charge-transfer resistance.
Measurement of CH4 yield under photoreduction conditions.
2D-Cu2O/CN achieves a CH4 yield of 14.1 μmol·g−1·h−1.
This yield is 4-fold higher compared to carbon nitride alone.
The heterojunction exhibits improved separation of photogenerated electron-hole pairs.

Resumen

With the dual challenges of global energy scarcity and worsening environmental issues, the efficient and selective conversion of CO2 into CH4-an environmentally friendly fuel with high energy density—offers considerable application potential. In this study, a 2D-Cu2O/carbon nitride (2D-Cu2O/CN) heterojunction catalyst was successfully prepared. Notably, 2D-Cu2O/CN shows enhanced light absorption capacity, reduced charge-transfer resistance, and efficient separation of photogenerated electron–hole pairs. It exhibits a CH4 yield of 14.1 μmol·g−1·h−1, 4-fold higher than that of CN. This study provides a feasible approach for the design of high-efficiency photocatalysts for CO2 reduction to CH4.

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