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Enhanced degradation of 17β-estradiol by AgI/N-Bi2O3 composite: strong synergy of adsorption–photocatalysis

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Abstract

17β-estradiol (E2) is one of the environmental endocrine disruptors threatening human health. In this paper, AgI/N-Bi2O3 composites with the different mass ratio of AgI were used to remove E2 in water. The results showed that 40% AgI/N-Bi2O3 composite could degrade E2 by adsorption and photocatalysis synergism: 89% of E2 was adsorbed after 30 min in the dark, and E2 was completely degraded after only 10 min under visible light irradiation. Furthermore, the adsorption process of E2 can be well fitted by the pseudo-second-order kinetic model and the Langmuir model well described the E2 adsorption on the 40% AgI/N-Bi2O3 composite. Finally, the photocatalytic degradation dates were fitted to the pseudo-first-order kinetic model and the possible mechanism of photocatalytic degradation was proposed through the capture experiments of active species and theoretical calculations.

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Acknowledgement

This work was supported by National Natural Science Foundation of China (Nos. 21763032, 21261026 and 21767030) and Major Project of Kunming Science and Technology Bureau (No. 2017-1-S-12305).

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Author notes

  1. Yanju Long and Di Huang have contributed equally to this work.

Authors and Affiliations

  1. School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China

    Yanju Long, Di Huang, Lingxin Li, Lulu Wang, Sifeng Zhang & Fengzhi Jiang

  2. School of Chemistry and Biotechnology, Yunnan MinZu University, Kunming, 650500, China

    Lijun Luo

Authors
  1. Yanju Long
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  2. Di Huang
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  3. Lijun Luo
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  4. Lingxin Li
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  5. Lulu Wang
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  7. Fengzhi Jiang
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Correspondence to Fengzhi Jiang.

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Long, Y., Huang, D., Luo, L. et al. Enhanced degradation of 17β-estradiol by AgI/N-Bi2O3 composite: strong synergy of adsorption–photocatalysis. Res Chem Intermed 44, 7117–7133 (2018). https://doi.org/10.1007/s11164-018-3546-2

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  • DOI: https://doi.org/10.1007/s11164-018-3546-2

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