Gang Ruiqi, Xu Lei, Xia Yi, Cai Jun, Zhang Libo, Wang Shixing, Li Rui
National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China.
National Local Joint Laboratory of Engineering Application of Microwave Energy and Equipment Technology, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, PR China.
J Colloid Interface Sci. 2020 Nov 1;579:853-861. doi: 10.1016/j.jcis.2020.06.116. Epub 2020 Jul 3.
In this paper, a novel 0D/2D heterojunction photocatalyst based on MoS 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% MoS/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, MoS 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一种基于MoS量子点/ZnO纳米片的新型零维/二维异质结光催化剂，并研究了其在紫外光下对有机染料（罗丹明B）降解和气态重金属（汞）去除的光催化行为。对于最佳的5%MoS/ZnO光催化剂，50分钟内可去除95%的罗丹明B，60分钟内可去除99.8%的气态汞。此外，MoS量子点/ZnO纳米片还表现出优异的光催化耐久性。构建的零维/二维异质结能够有效提高光生载流子的分离效率和电荷转移，从而提高光催化活性。因此，该策略为设计用于水处理和空气污染的双功能零维/二维异质结光催化剂提供了一种新方法。
