CsPbBr3 Perovskite Quantum Dots/Ultrathin C3N4 Nanosheet 0D/2D Composite: Enhanced Stability and Photocatalytic Activity

doi:10.15541/jim20200744

Abstract

Abstract:

Metal-halide perovskite quantum dots (QDs) have emerged as a potential photocatalyst owing to their remarkable optoelectronic properties. However, the poor stability and insufficient charge transportation efficiency of this type of materials hindered their applications in the photocatalysis field. Herein, we decorated CsPbBr₃ QDs on two-dimensional (2D) ultrathin g-C₃N₄ (UCN) nanosheets to develop a 0D/2D CsPbBr₃/UCN composite photocatalyst. The introduction of UCN can not only improve the stability of CsPbBr₃ QDs by passivating the surface ligands of CsPbBr₃ QDs, but also facilitate the charge transfer due to the suited band gap alignment. Consequently, the obtained CsPbBr₃/UCN heterostructure exhibited superior photocatalytic performance to both pristine CsPbBr₃ QDs and UCN. This work has provided an efficient strategy for the design of CsPbX₃-based heterostructure with high stability and photocatalytic activity.

Key words: perovskite quantum dots, 2D ultrathin nanosheets, photocatalysis, CsPbBr₃, g-C₃N₄

CLC Number:

O649

SHU Mengyang, LU Jialin, ZHANG Zhijie, SHEN Tao, XU Jiayue. CsPbBr₃ Perovskite Quantum Dots/Ultrathin C₃N₄ Nanosheet 0D/2D Composite: Enhanced Stability and Photocatalytic Activity[J]. Journal of Inorganic Materials, 2021, 36(11): 1217-1222.

Figures/Tables 7

References 27

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CsPbBr₃ Perovskite Quantum Dots/Ultrathin C₃N₄ Nanosheet 0D/2D Composite: Enhanced Stability and Photocatalytic Activity

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