DOI: 10.1002/solr.202400013 ISSN: 2367-198X

Readily Available Stable Non‐quantum dot CsPbBr3/TiO2 Heterostructure Crystals for Efficient photocatalyst

Xing Huang, Wenqiang Zhu, Hang Zhao, Kuanxin Lv, Zhenzhen Li
  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials

The application of perovskites in the field of photocatalyst has been great limited due to their stability. In this study, the easy‐to‐prepare CsPbBr3/TiO2 heterostructure nanocrystals is employed as photocatalyst. The results confirm that the strong interfacial connection and efficient charge separation can be observed in CsPbBr3/TiO2 heterostructure crystals by natural crystal growth. Consequently, the generation of superoxide radicals, which is beneficial for the photocatalytic properties, are obviously increased. The CsPbBr3/TiO2 heterostructure nanocrystals completely degrade Rhodamine B in just 4 min. In addition, it is also found that the non‐quantum dot CsPbBr3 crystals can be naturally encapsulated by the stable and compact TiO2 nanoparticles without complex synthesis process, which finally provides an excellent protection for the stability of CsPbBr3 perovskite. The CsPbBr3/TiO2 heterostructure nanocrystals can exhibit almost no degradation of photocatalytic performance exceeding 8 months in oceanic climate (10 °C≤T≤32 °C, 20%≤RH≤100%), showing a remarkable stability.

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