In this paper, In₂Se₃/CdSe nanocomposites are successfully synthesized and used for photocatalytic hydrogen production. HRTEM and XPS confirm the existence of heterojunction between In₂Se₃ and CdSe. The In₂Se₃/CdSe nanocomposite with a CdSe content of about 85.96% shows the best photocatalytic hydrogen production activity, and its photocatalytic performance is much better than that of In₂Se₃ and CdSe. The improved photocatalytic hydrogen production ability of the In₂Se₃/CdSe nanocomposite is attributed to the good visible-light absorption ability and the step-scheme heterojunction formed between In₂Se₃ and CdSe. The step-scheme heterojunction can significantly enhance the separation of photogenerated electrons and holes, thus improving the photocatalytic activity of the photocatalysts. This study provides a feasible method for the construction of step-scheme photocatalyst for hydrogen production.

本文成功地合成了In ₂ Se ₃ / CdSe纳米复合材料，并将其用于光催化制氢。HRTEM和XPS证实了In ₂ Se ₃和CdSe之间存在异质结。CdSe含量约为85.96％的In ₂ Se ₃ / CdSe纳米复合材料表现出最佳的光催化制氢活性，其光催化性能远优于In ₂ Se ₃和CdSe。In ₂ Se ₃的提高的光催化制氢能力/ CdSe纳米复合材料归因于良好的可见光吸收能力以及In ₂ Se ₃与CdSe之间形成的阶梯式异质结。阶梯式异质结可以显着增强光生电子与空穴的分离，从而提高了光催化剂的光催化活性。该研究为逐步制备制氢光催化剂提供了一种可行的方法。