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Boosting photocatalytic efficiency of MoS2/CdS by modulating morphology

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Abstract

CdS-based composites as the highly efficient photocatalyst have been extensively investigated in recent years due to the suitable band gap and high photocatalytic efficiency. In this study, the effect of various factors (pH, U(VI) concentration, contents, and types of photocatalyst) on photocatalytic reduction of U(VI) by MoS2/CdS composite was investigated. The optimized experimental conditions (e.g., pH 7.0, 20 mg/g U(VI), and 1.0 g/L photocatalyst) was obtained by batch techniques. Approximately 97.5% of U(VI) was photo-catalytically reduced into U(IV) by 2.5 wt% MoS2/CdS composite within 15 min. After 5 cycles, 2.5 wt% MoS2/CdS composite still exhibited the high removal efficiency of U(VI) under 50-min irradiation, indicating the good stability. The photo-reduction mechanism of U(VI) on MoS2/CdS composite was attributed to the O−2 radicals by quenching experiments, ESR, and XPS analysis. The findings indicate that CdS-based catalyst has a great potential for the photocatalytic reduction of uranyl in actual environmental remediation.

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All data generated or analyzed during this study are included in this published article.

Funding

The project was financially supported by Fundamental Research Funds of the Central Universities (No. 2021MS036).

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Authors and Affiliations

  1. College of Environmental Science and Engineering, North China Electric Power University, Bei**g, 102206, China

    Yubing Sun, **gting **ao, **nshui Huang, Peng Mei & Huihui Wang

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  1. Yubing Sun
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  2. **gting **ao
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  3. **nshui Huang
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  4. Peng Mei
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  5. Huihui Wang
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Contributions

**gting **ao: conceptualization, methodology, investigation, and writing and revising original draft. **nshui Huang: methodology and editing. Peng Mei: methodology, analysis, and editing. Huihui Wang: methodology, analysis, and editing. Yubing Sun: conceptualization, writing–review, revising, editing, and supervision.

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Correspondence to Yubing Sun.

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Sun, Y., **ao, J., Huang, X. et al. Boosting photocatalytic efficiency of MoS2/CdS by modulating morphology. Environ Sci Pollut Res 29, 73282–73291 (2022). https://doi.org/10.1007/s11356-022-20550-1

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