Highly Stable CsPbBr3 Colloidal Nanocrystal Clusters as Photocatalysts in Polar Solvents,ACS Applied Materials & Interfaces

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Highly Stable CsPbBr3 Colloidal Nanocrystal Clusters as Photocatalysts in Polar Solvents
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-01-12 , DOI: 10.1021/acsami.0c20349
Huicheng Hu ₁ , Min Chen ₁ , Nan Yao ₁ , Linzhong Wu ₁ , Qixuan Zhong ₁ , Bin Song ₁ , Muhan Cao ₁ , Qiao Zhang ₁

Affiliation

One of the main challenges of all-inorganic cesium lead halide (CsPbX₃) perovskite nanocrystals (NCs) in photocatalysis is their poor stability in hostile environments such as polar solvents. Herein, we report highly stable CsPbBr₃ colloidal nanocrystal clusters (CNCs) with uniform morphology and size prepared by using a PVP-assisted reprecipitation method. A possible formation process through a self-assembly avenue is proposed. These CsPbBr₃ CNCs exhibit much enhanced resistance against a variety of polar solvents in comparison with CsPbBr₃ NCs obtained from the commonly used hot-injection method. In addition, this method can be generalized to the synthesis of lead-free perovskites CNCs. The as-prepared CsPbBr₃ CNCs display good reactivity and high durability in photocatalytic degradation of methylene blue in alcoholic systems. This work will shed some light on the stabilization of perovskite NCs in polar solvents and perovskite NC-based photocatalysts.

中文翻译：

高度稳定的CsPbBr ₃胶体纳米晶体簇在极性溶剂中作为光催化剂

在光催化中，全无机卤化铯铯铅（CsPbX ₃）钙钛矿纳米晶体（NCs）的主要挑战之一是它们在不利环境（例如极性溶剂）中的稳定性差。在这里，我们报告高度稳定的CsPbBr ₃胶体纳米晶体簇（CNC），具有均匀的形态和大小，通过使用PVP辅助再沉淀法制备。提出了通过自组装途径可能的形成过程。这些CsPbBr ₃的CNC表现出很大增强对抗多种极性溶剂的电阻与CsPbBr比较_3吨从通常使用的热喷射方法得到的NC。此外，该方法可以推广到无铅钙钛矿型CNC的合成。准备好的CsPbBr ₃CNCs在酒精体系中对亚甲基蓝的光催化降解方面显示出良好的反应性和高耐久性。这项工作将为极性溶剂中钙钛矿NCs和钙钛矿NC基光催化剂的稳定化提供一些启示。

更新日期：2021-01-27

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