有機色素及びガス状重金属除去のためのMoS QDs/ZnOナノシート0D/2Dヘテロ接合光触媒の作製

Fabrication of MoS QDs/ZnO nanosheet 0D/2D heterojunction photocatalysts for organic dyes and gaseous heavy metal removal.

• Ruiqi Gang
• Lei Xu
• Yi Xia
• Jun Cai
• Libo Zhang
• Shixing Wang
• Rui Li

抄録

本論文では、MoS QDs/ZnOナノシートを用いた新規な0D/2Dヘテロ接合光触媒の作製に成功し、有機色素(RhB)分解とガス状重金属(Hg)除去のための紫外光下での光触媒挙動を調べた。最適な5%MoS/ZnO光触媒を用いた場合、50分で95%のRhBを除去でき、60分で99.8%の水銀を除去できた。また、MoS QDs/ZnOナノシートは優れた光触媒耐久性を示した。また、0D/2Dヘテロ接合を構築したことで、光発生キャリアの分離効率と電荷移動を効率的に向上させることができ、光触媒活性を向上させることができた。したがって、この戦略は、水処理や大気汚染のための二機能性0D/2Dヘテロ接合光触媒を設計するための新しい方法を提供しました。

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.

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