Construction of Novel CdS/SnNb 2 O 6 Heterojunctions with Enhanced Photocatalytic Degradation Activity Under Visible Light

‐Accelerating the photo‐induced charge carrier transfer and improving charge utilization are critical for enhancing the photocatalytic activity of photocatalysts. In this work, we successfully constructed CdS/SnNb 2 O 6 heterojunction photocatalysts by a facile hydrothermal method. The obtained CdS/SnNb 2 O 6 heterojunction exhibited better photocatalytic performance than pristine CdS and SnNb 2 O 6 , and the photocatalytic activity of the optimal ratio sample (40 % CdS) was 3.2 and 28.5 times as high as that of the pristine CdS and SnNb 2 O 6 , respectively. On the basis of the PL spectra, transient photocurrent response, trapping experiments of the active species, and ESR results, the possible charge carrier transfer and photocatalytic mechanisms of the CdS/SnNb 2 O 6 heterojunction photocatalyst have been illustrated. We demonstrated that the combination of CdS and SnNb 2 O 6 can greatly boost the photo‐generated charge carrier separation and therefore enhance the photocatalytic activity. Our work opens up a new insight for development of semiconductor photocatalysts with high efficiency.