Carbon Quantum Dots/Cu2O Heterostructures for Solar‐Light‐Driven Conversion of CO2 to Methanol

A carbon quantum dots (CQDs)/Cu2O heterostructure with a protruding structure is synthesized and found to offer highly efficient photocatalytic conversion of CO2 to methanol under solar-light irradiation. The CQDs/Cu2O photocatalyst exhibits excellent stability during the conversion process, which is attributed to the photoinduced electron transfer properties of the CQDs.