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娟娟 施, anting zhao. Characterization and Visible Light Photocatalytic Activity of Cucurbit [n] urils / CdS-MoS2[J]. Chinese Journal of Chemical Physics .
Citation: 娟娟 施, anting zhao. Characterization and Visible Light Photocatalytic Activity of Cucurbit [n] urils / CdS-MoS2[J]. Chinese Journal of Chemical Physics .

Characterization and Visible Light Photocatalytic Activity of Cucurbit [n] urils / CdS-MoS2

  • Received Date: 2020-12-23
  • Accepted Date: 2021-03-15
  • Rev Recd Date: 2021-03-15
  • Available Online: 2021-04-01
  • In order to reduce the impact of CdS photogenerated electron-hole recombination on its photocatalytic performance, a narrow band gap semiconductor MoS2 and organic macromolecular cucurbit[n]urils(Q[n]) were used to modify CdS. Q[n]/CdS-MoS2 (n=6, 7, 8) composite photocatalysts were synthesized by hydrothermal method. Infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (SEM), ultraviolet-visible (UV-Vis) and photoluminescence spectrum (PL) were used to characterize the structure, morphology and optical properties of the products, and the catalytic degradation of the solutions of methylene blue, rhodamine B and crystal violet by Q[n]/CdS-MoS2 composite catalyst was investigated. The results showed that the Q[n] played a regulatory role on the growth and crystallization of CdS-MoS2 particles, Q[n]/CdS-MoS2 (n=6, 7, 8) formed flower clusters with petal-like leaves, the flower clusters of petal-like leaves increased the surface area and active sites of the catalyst, the Q[n]/CdS-MoS2 barrier width decreased, the electron-hole pair separation efficiency was improved in the Q[6]/Cds-MoS2. Q[n] makes the electron-hole pair to obtain better separation and migration. The Q[6]/CdS-MoS2 and Q[7]/CdS-MoS2 have good photocatalytic activity for methylene blue, and the catalytic process is based on hydroxyl radical principle.

     

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