Photocatalytic hydrogen production from water splitting production is a promising strategy to solve the energy crisis and environmental pollution. In the present work, Co₃O₄/CdS composites were prepared by ultrasonication and stirring, and used for photocatalytic water splitting. The results showed a Co-S chemical bonds were formed at the interfaces between the Co₃O₄ and the CdS, which promoted the charge transfer rate between the CdS and Co₃O₄. Meanwhile, the recombination of the electron-hole pairs was further restrained by the Co₃O₄/CdS p-n heterojunction. The 10%-Co₃O₄/CdS composites exhibited an excellent photocatalytic hydrogen production rate of 142.62 μmol∙h⁻¹, which was 20 times higher than that of CdS (6.85 μmol∙h⁻¹), and the Co₃O₄/CdS showed excellent stability in the photocatalytic water splitting reaction. Moreover, a formation process of Co₃O₄/CdS p-n heterojunction and a mechanism of Co₃O₄/CdS p-n heterojunction avoiding the recombination of photocatalytic electrons and holes to enhance photocatalytic activity was proposed.

光催化分解水制氢是解决能源危机和环境污染的一种很有前景的策略。在目前的工作中，通过超声和​​搅拌制备了Co ₃ O ₄ /CdS 复合材料，并将其用于光催化分解水。结果表明，Co ₃ O ₄和CdS之间的界面形成了Co-S 化学键，促进了CdS 和Co ₃ O ₄之间的电荷转移速率。同时，Co ₃ O ₄ /CdS pn异质结进一步抑制了电子-空穴对的复合。10%-Co ₃ O ₄/CdS 复合材料表现出优异的光催化产氢速率 142.62 μmol∙h ^-1，是 CdS (6.85 μmol∙h ^-1 ) 的20 倍，Co ₃ O ₄ /CdS 在光催化过程中表现出优异的稳定性水分解反应。此外，钴的形成工艺₃ ö ₄ / CdS的pn异质结和Co的机构₃ ö ₄ / CdS的pn异质结光催化避免电子和空穴的再结合，以提高光催化活性，提出了。