MoS2-Modified CdS Hexagonal Pyramid To Form a New Photogenerated Carrier Migration Path with Highly Efficient Photocatalytic H2 Performance

The development of highly active photocatalysts in visible light response for photocatalytic hydrogen production has become a hot spot. In this work, we report a MoS2-modified CdS hexagonal pyramid composite photocatalyst. It shows a maximum H2 evolution rate of 18.75 mmol g-1 h-1, which is 3.4 times higher than that of pure CdS, and the apparent quantum efficiency is 22.75% at 420 nm. It is confirmed that the separation efficiency of photogenerated carriers can be improved after loading MoS2. Furthermore, surface photovoltage spectroscopy and transient photovoltage spectroscopy indicate that the new migration paths of photogenerated carriers have been formed between CdS and MoS2, which are beneficial to prolong the lifetime of photogenerated carriers. Hence, the hydrogen production activity of the CdS/MoS2 photocatalyst can be improved.

Automated summary

In this study, a MoS2-modified CdS photocatalyst was developed, which exhibited enhanced hydrogen production activity. The loading of MoS2 improved the separation efficiency of photogenerated carriers and formed new migration paths, leading to prolonged carrier lifetime.