A heterojunction made of 0D near-infrared (NIR)-responsive PbS@CdS@ZnS core@shell@shell quantum dots (PCZ QDs) and 2D graphitic carbon nitride (g-C₃N₄) nanosheets was rationally constructed herein. In addition to some typical advantages of 0D/2D composites, such as short required charge-diffusion distance and high charge mobility, our designed PCZ QDs/g-C₃N₄ photocatalysts offer additional beneficial features. The broadband optical absorption of high-quality PCZ QDs highly dispersed on g-C₃N₄ nanosheets and their strong interaction yield efficient charge transfer between them and endow PCZ QDs/g-C₃N₄ with high photocatalytic activity from ultraviolet to NIR regions. With the optimized QDs loading level, the achieved, normalized rate constant is higher than the best-reported value for NIR-driven photocatalysis. PCZ QDs/g-C₃N₄ possesses good recycling performance and no metal release was detected in the solution after photocatalysis. This work highlights the great potential of QDs/g-C₃N₄ 0D/2D photocatalysts in realizing high-efficiency broadband photocatalysis and functional optoelectronic devices for full solar spectrum exploitation.

本文合理地构造了由0D近红外（NIR）响应的PbS @ CdS @ ZnS核@壳@壳量子点（PCZ QDs）和2D石墨氮化碳（gC ₃ N ₄）纳米片制成的异质结。除了0D / 2D复合材料的一些典型优点（例如所需的电荷扩散距离短和电荷迁移率高）以外，我们设计的PCZ QDs / gC ₃ N ₄光催化剂还提供了其他有益的功能。高质量PCZ QD高度分散在gC ₃ N ₄纳米片上的宽带光吸收及其强相互作用产生了它们与赋予PCZ QDs / gC ₃ N _4的高效电荷转移具有从紫外线到近红外区域的高光催化活性。通过优化的QD负载水平，实现的归一化速率常数高于NIR驱动的光催化的最佳报告值。PCZ QDs / gC ₃ N ₄具有良好的再循环性能，光催化后在溶液中未检测到金属释放。这项工作凸显了QDs / gC ₃ N ₄ 0D / 2D光催化剂在实现高效宽带光催化和功能性光电器件以实现全太阳光谱利用方面的巨大潜力。