期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 3, 页码 4017-4025出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c20349
关键词
CsPbBr3; colloidal nanocrystal cluster; polar solvent; lead-free; photocatalysis
资金
- National Natural Science Foundation of China [21673150, 21703146, 51922073]
- Natural Science Foundation of Jiangsu Province [BK20180097]
- 111 Project
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC)
- Postgraduate Research and Practice Innovation Program of Jiangsu Province [KYCX18-2505, KYCX19-1920]
Highly stable CsPbBr3 colloidal nanocrystal clusters (CNCs) with uniform morphology and size were prepared using a PVP-assisted reprecipitation method. These CNCs exhibit enhanced resistance against a variety of polar solvents and show good reactivity and high durability in photocatalytic degradation of methylene blue in alcoholic systems. This method can also be generalized to the synthesis of lead-free perovskites CNCs.
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 CsPbBr(3 )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 co, 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.
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