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Preparation and Photocatalytic Performance of Double-Shelled Hollow W18O49@C3N4@Ti3C2 Microspheres

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Abstract

C3N4, C3N4@Ti3C2 and W18O49@C3N4@Ti3C2 hollow spheres were successfully prepared by using SiO2 template followed by gradual deposition method. The degradation of phenol solution and photolysis ability were tested to characterize its photocatalytic activity. Compared with the single-shelled C3N4 and C3N4@Ti3C2 hollow spheres, double-shelled W18O49@C3N4@Ti3C2 hollow spheres possessed larger surface area and fast charge separation efficiency, exhibiting about 8.9 times and 4.0 times higher H2 evolution than those of C3N4, C3N4@Ti3C2 hollow spheres, respectively. The photocatalytic mechanism of the W18O49@C3N4@Ti3C2 hollow spheres were carefully investigated according to the results of morphology design and photoelectric performance. A Z scheme mechanism based on the construction of heterojunctions was proposed to explain the improvement of photocatalytic performance. This new charge transfer mechanism appears to greatly inhibit the recombination of electrons/holes during the charge transfer process, while maintaining its strong hydrogen reduction ability, resulting in a higher photocatalytic performance.

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Authors and Affiliations

  1. Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan, 430072, China

    Yaqi Tan  (谭雅琪), Hongyu Ma, Rui Xiong & Jianhong Wei  (魏建红)

Authors
  1. Yaqi Tan  (谭雅琪)
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  2. Hongyu Ma
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  3. Rui Xiong
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  4. Jianhong Wei  (魏建红)
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Corresponding author

Correspondence to Jianhong Wei  (魏建红).

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Supported by the National Natural Science Foundation of China (Nos. 91963207 and 12075174)

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Tan, Y., Ma, H., Xiong, R. et al. Preparation and Photocatalytic Performance of Double-Shelled Hollow W18O49@C3N4@Ti3C2 Microspheres. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 36, 311–317 (2021). https://doi.org/10.1007/s11595-021-2411-0

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  • DOI: https://doi.org/10.1007/s11595-021-2411-0

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