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Anchoring MoS2 microflowers on oxygen-doped g-C3N4 nanosheets to construct Z-scheme hybrid composites for photocatalytic hydrogen production

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Abstract

Fabricating carbon nitride (g-C3N4) based photocatalysts with high visible-light utilization efficiency and rapid photogenerated carrier migration rate is crucial for the improvement of photocatalytic hydrogen production. Herein, we designed and prepared Z-scheme O-CNS/MoS2 hybrid composites via a two-step combining with ultrasound sonication method. The obtained O-CNS/MoS2 composites possessed boosting visible-light absorption capacity, revealed by the results of the diffused reflectance spectra (DRS). In contrast to bulk g-C3N4 (u-CNB) and O-CNS samples, the obtained O-CNS/MoS2 composites displayed significantly enhanced photocatalytic hydrogen behavior. Specifically, the O-CNS/MoS2 photocatalysts with 5 wt% loading of MoS2 exhibited the highest hydrogen production rate (HPR), which was respectively 26.5 and 1.97 times bigger than that of u-CNB and O-CNS sample correspondingly. This promoted photocatalytic hydrogen behavior was plausibly attributed to the synergistic effect of the porous structure, improved light absorption capacity, and enhanced photoactivated carrier migration rate. Based on comprehensive analysis, the migration and separation pathway of photoactivated carriers were proposed for interpreting the enhancement mechanism of the photocatalytic hydrogen behavior. Our work will open up an innovative strategy for the design and construction of novel g-C3N4 hybrid photocatalysts with boosting photocatalytic hydrogen production behavior.

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Acknowledgements

The authors express grateful thanks to the Department of Science and Technology of Henan Province, China (Henan Science and Technology Research Program, 222102520005 and 232102521021), and the Education Department of Henan Province for the fund support (21A430026).

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Authors and Affiliations

  1. Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium Based Battery &, School of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang, 471023, People’s Republic of China

    Tiekun Jia, Dongsheng Yu, Fang Fu, Ji Hu & Jili Li

  2. State Key Lab of Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, People’s Republic of China

    Zhao Deng

  3. School of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, People’s Republic of China

    Qian Zhang & Yinao Wang

  4. Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju, 54896, Korea

    Joong Hee Lee

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  1. Tiekun Jia
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  2. Zhao Deng
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  4. Fang Fu
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Contributions

Tiekun Jia: conceptualization, wring—original draft, writing—review and editing. Zhao Deng: formal analysis, investigation. Dongsheng Yu: investigation, data curation. Fang Fu: investigation, data curation. Qian Zhang: investigation, writing—review and editing. Yinao Wang: investigation, writing—review and editing. Ji Hu: measurements. Jili Li: methodology, formal analysis. Joong Hee Lee: supervision.

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Jia, T., Deng, Z., Yu, D. et al. Anchoring MoS2 microflowers on oxygen-doped g-C3N4 nanosheets to construct Z-scheme hybrid composites for photocatalytic hydrogen production. Ionics 30, 3417–3429 (2024). https://doi.org/10.1007/s11581-024-05540-2

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