In this paper, a novel 0D/2D heterojunction photocatalyst based on MoS₂ QDs/ZnO nanosheets was successfully constructed by a simple two-step process, and its photocatalytic behavior for organic dyes (RhB) degradation and gaseous heavy metals (Hg) removal under ultraviolet light were studied. For the optimum 5% MoS₂/ZnO photocatalyst, 95% of RhB could be removed in 50 min, and 99.8% of the gaseous mercury could be removed in 60 min. Besides, MoS₂ QDs/ZnO nanosheets also exhibited excellent photocatalytic durability. The constructed 0D/2D heterojunctions could efficiently improve the separation efficiency and charge transfer of photogenerated carriers, thus improving the photocatalytic activity. Therefore, this strategy provided a new way to design bifunctional 0D/2D heterojunction photocatalysts for water treatment and air pollution.

本文通过简单的两步法成功构建了基于MoS ₂ QDs / ZnO纳米片的新型0D / 2D异质结光催化剂，并在光催化下降解有机染料（RhB）和去除气态重金属（Hg）的光催化行为。研究了紫外线。对于最佳的5％MoS ₂ / ZnO光催化剂，可以在50分钟内除去95％的RhB，在60分钟内可以除去99.8％的气态汞。此外，MoS ₂QDs / ZnO纳米片也表现出出色的光催化耐久性。构造的0D / 2D异质结可以有效提高光生载流子的分离效率和电荷转移，从而提高了光催化活性。因此，该策略为设计用于水处理和空气污染的双功能0D / 2D异质结光催化剂提供了新途径。