SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 41 ›› Issue (1): 488-496.DOI: 10.1016/j.cjche.2021.08.030

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Photocatalytic degradation of tetracycline hydrochloride with visible light-responsive bismuth tungstate/conjugated microporous polymer

Fenghongkang Pan1, Yimeng Wang1,2, Kaiqing Zhao1, Jun Hu1, Honglai Liu1, Ying Hu1   

  1. 1 State Key Laboratory of Chemical Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2 Prinbury Biopharm Co., Ltd, Shanghai 201203, China
  • Received:2021-06-07 Revised:2021-08-26 Online:2022-02-25 Published:2022-01-28
  • Contact: Jun Hu,E-mail address:junhu@ecust.edu.cn
  • Supported by:
    This work is supported by the National Natural Science Foundation of China (91834301 and 21878076) and the Science and Technology Commission of Shanghai Municipality (19160712100).

Photocatalytic degradation of tetracycline hydrochloride with visible light-responsive bismuth tungstate/conjugated microporous polymer

Fenghongkang Pan1, Yimeng Wang1,2, Kaiqing Zhao1, Jun Hu1, Honglai Liu1, Ying Hu1   

  1. 1 State Key Laboratory of Chemical Engineering and School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2 Prinbury Biopharm Co., Ltd, Shanghai 201203, China
  • 通讯作者: Jun Hu,E-mail address:junhu@ecust.edu.cn
  • 基金资助:
    This work is supported by the National Natural Science Foundation of China (91834301 and 21878076) and the Science and Technology Commission of Shanghai Municipality (19160712100).

Abstract: Conjugated microporous polymer (CMP) is an emerging organic semiconductor with p-conjugated skeletons, and the bandgap of CMP can be flexibly modulated to harvest visible light. Based on the diversity and adjustability of monomers in CMP, we designed and synthesized donor-accepter (D-A) type BTNCMP through Sonogashira-Hagihara cross-coupling polymerization, further in-situ constructing series of inorganic/organic Z-scheme BW/BTN-n composite in the presence of Bi2WO6. After optimization, the tetracycline hydrochloride (C0 = 10 mg·L-1) degradation efficiency reached 84% with BW/BTN-2 as catalyst in 90 min under visible light irradiation, the apparent rate constant k1 is 0.017 min-1, which is 1.7 and 5.7 times higher than bare Bi2WO6 and BTN-CMP. X-ray photoelectron spectra and UV–Vis diffuse spectra showed that the enhanced photocatalytic activity originated from the tight heterojunction between Bi2WO6 and BTN-CMP, which can extend the light absorption range and facilitate the separation and transport of photogenerated charges in the interface of heterojunction. The active species trapping experiments and electron spin resonance technique revealed that h+ was the dominant active species during the photodegradation process of tetracycline hydrochloride (TCH). The present study demonstrated the feasibility to construct inorganic/organic composite for the photocatalytic degradation of environmental pollutants.

Key words: Photochemistry, Degradation, Visible light response, Pollution, Inorganic/organic heterojunction composite

摘要: Conjugated microporous polymer (CMP) is an emerging organic semiconductor with p-conjugated skeletons, and the bandgap of CMP can be flexibly modulated to harvest visible light. Based on the diversity and adjustability of monomers in CMP, we designed and synthesized donor-accepter (D-A) type BTNCMP through Sonogashira-Hagihara cross-coupling polymerization, further in-situ constructing series of inorganic/organic Z-scheme BW/BTN-n composite in the presence of Bi2WO6. After optimization, the tetracycline hydrochloride (C0 = 10 mg·L-1) degradation efficiency reached 84% with BW/BTN-2 as catalyst in 90 min under visible light irradiation, the apparent rate constant k1 is 0.017 min-1, which is 1.7 and 5.7 times higher than bare Bi2WO6 and BTN-CMP. X-ray photoelectron spectra and UV–Vis diffuse spectra showed that the enhanced photocatalytic activity originated from the tight heterojunction between Bi2WO6 and BTN-CMP, which can extend the light absorption range and facilitate the separation and transport of photogenerated charges in the interface of heterojunction. The active species trapping experiments and electron spin resonance technique revealed that h+ was the dominant active species during the photodegradation process of tetracycline hydrochloride (TCH). The present study demonstrated the feasibility to construct inorganic/organic composite for the photocatalytic degradation of environmental pollutants.

关键词: Photochemistry, Degradation, Visible light response, Pollution, Inorganic/organic heterojunction composite