Abstract
In this work, FeSe2 nanorods have been employed to be loaded on SnSe nanosheets to develop 1D/2D FeSe2/SnSe heterojunction photocatalysts. These test results of XRD, SEM, HRTEM and XPS fully confirm the successful construction of FeSe2/SnSe heterojunction. These results of photocatalytic and photoelectrochemical test further reveal that FeSe2/SnSe heterojunction photocatalysts have excellent photocatalytic and photoelectrochemical activities. In comparison to the SnSe, the highest photocurrent density of the 1D/2D FeSe2/SnSe heterojunction photocatalyst is 19.2 μA/cm2, which has 123% promotion. Besides, the biggest degradation rates k of the 1D/2D FeSe2/SnSe heterojunction photocatalyst is 0.00612 nearly 297% enhancement than the SnSe. Further analysis indicated that as for 1D/2D FeSe2/SnSe heterojunction photocatalyst, its internal resistance was largely reduced and carrier separation efficiency was significantly improved with the recombination of FeSe2. This work confirmed that FeSe2/SnSe is an ideal composite system with great potential in photocatalysis.
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