| 초록 |
To achieve low-cost and high stability, we report a hybrid Cu2ZnSnS4(CZTS)-ZnO photocatalyst synthesized in a simple two-step process. Photocatalytic performance is evaluated by measuring the conversion yield of CO2 to hydrocarbon fuel under simulated sunlight. Our optimum CZTS-ZnO photocatalyst exhibits a CH4 yield of 138.90 ppm g−1 h−1, a factor of ≈ 31 times greater than the un-sensitized ZnO nanorods, and ≈ 22 times greater than the CZTS nanoparticles with excellent stability showing similar CH4 production up to five test-cycles. The enhanced performance of the hybrid, noble metal-free photocatalyst can be attributed to improved light absorption and efficient separation of the photogenerated charge due to the Z-scheme heterojunction interface. |
