4.7 Article

CsPbBr3-MoS2-GO nanocomposites for boosting photocatalytic degradation performance

Journal

APPLIED SURFACE SCIENCE
Volume 551, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.apsusc.2021.149452

Keywords

Perovskite; Nanocomposites; CsPbBr3; Photocatalytic; Degradation

Funding

  1. Natural Science Foundation of the Jiangsu Higher Education Institutions of China [17KJA430009]
  2. National Natural Science Foundation of China [51202108]

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Through innovative introduction of MoS2-graphene oxide composite structure, CsPbBr3-MoS2-GO nanocomposites were synthesized, exhibiting excellent photocatalytic performance in degrading Sudan Red III under Xenon lamp irradiation. The degradation rate of Sudan Red III by the nanocomposites is 3.1 times higher than that of pure perovskite quantum dots, showcasing promising application prospects.
In order to address the main challenge of weak photocatalytic performance of pure metal halide perovskite materials, we innovatively introduced MoS2-graphene oxide (GO) composite structure and synthesized CsPbBr3-MoS2-GO nanocomposites by a two-step method. XRD and Raman results show that the three components are well combined to form a new CsPbBr3-MoS2-GO nanocomposite. TEM results show that MoS2 nanoribbons and CsPbBr3 quantum dots (QDs) are uniformly dispersed on the GO sheet. The photocatalytic activity of nanocomposites was evaluated by studying the photodegradation of Sudan Red III under xenon lamp irradiation. Benefiting from abundant active interfaces, the nanocomposites show much excellent photocatalytic degradation performance compared with pure CsPbBr3 QDs. The degradation rate of Sudan Red III by CsPbBr3-MoS2-GO nanocomposites is 3.1 times of that of pure perovskite QDs. Sudan Red III was completely photocatalytic degraded in 100 min. We believe that GO, with suitable band structure, high conductivity and good dispersibility, can bridge well MoS2 and CsPbBr3, act as a good electron transport channel, reduce carrier recombination and ultimately boost photocatalytic performance.

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