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A Tubular g-C3N4 Based Composite Photocatalyst Combined with Co3O4 Nanoparticles for Photocatalytic Degradation of Diesel Oil

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Abstract

The photocatalysis is a very promising technique to address the serious issues of environmental pollution. Among the common photocatalysts, the graphitic carbon nitride (g-C3N4) is widely used for the photodegradation of organic pollutants due to its proper band structure. To further improve the photocatalytic performance of g-C3N4, a novel composite photocatalyst of Co3O4/PT-C3N4 has been prepared by using a one-pot calcination method, in which cobalt tetroxide (Co3O4) nanoparticles as the cocatalyst are introduced on the surface of rectangular hollow g-C3N4 substrate (PT-Co3O4). As a result, the obtained composite photocatalyst (Co3O4/PT-C3N4) delivers an excellent photodegradation performance for diesel oil under a simulated sunlight, which can improve the separation efficiency of the photo-induced electron–hole pairs. The Co3O4/PT-C3N4 composite photocatalyst exhibits a high degradation efficiency of 96.27% after 2 h of visible light, which is much higher than that of the PT-C3N4 photocatalyst. Moreover, the composite photocatalyst can still maintain a high photodegradation efficiency after 10 cycles, exhibiting an excellent cyclic stability. The photo-induced carriers generated by the Co3O4/PT-C3N4 composite photocatalyst follow the Z-scheme heterojunction transfer mechanism. This work gives a fresh idea for the exploration of new high-performance photocatalyst for the treatment of organic environmental pollutants.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (21975180).

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  1. Er-Peng Bao and Ruichen Dong contributed equally to this work.

Authors and Affiliations

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China

    Er-Peng Bao, Ruichen Dong, Shuoqing Zhang, Weiguo Zhang, Jijun Zou & Qiang Xu

  2. School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia

    Huan Li

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  1. Er-Peng Bao
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Bao, EP., Dong, R., Zhang, S. et al. A Tubular g-C3N4 Based Composite Photocatalyst Combined with Co3O4 Nanoparticles for Photocatalytic Degradation of Diesel Oil. Catal Lett 151, 3437–3450 (2021). https://doi.org/10.1007/s10562-021-03583-y

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