Volume 18 Issue 4
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Article Navigation >  Water Science and Engineering  > 2025  >  18(4): 515-526
Phuong Thu Le, Thu Phuong Nguyen, Hong Nam Nguyen, Thu Huong Tran, Thi Hai Do, Phan Thi Thuy, Thi Mai Thanh Dinh, Toshiki Tsubota, Vinh Duc Nguyen, Trung Dung Nguyen. 2025: Z-scheme Bi2MoO6/g-C3N4 heterojunction for efficient antibiotic degradation via persulfate activation under visible light. Water Science and Engineering, 18(4): 515-526. doi: 10.1016/j.wse.2025.08.003
Citation: Phuong Thu Le, Thu Phuong Nguyen, Hong Nam Nguyen, Thu Huong Tran, Thi Hai Do, Phan Thi Thuy, Thi Mai Thanh Dinh, Toshiki Tsubota, Vinh Duc Nguyen, Trung Dung Nguyen. 2025: Z-scheme Bi2MoO6/g-C3N4 heterojunction for efficient antibiotic degradation via persulfate activation under visible light. Water Science and Engineering, 18(4): 515-526. doi: 10.1016/j.wse.2025.08.003
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Z-scheme Bi2MoO6/g-C3N4 heterojunction for efficient antibiotic degradation via persulfate activation under visible light

doi: 10.1016/j.wse.2025.08.003

  • a. University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Nghia Do Ward, Hanoi 100000, Viet Nam;

  • b. Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Nghia Do Ward, Hanoi 100000, Viet Nam;

  • c. Hanoi University of Mining and Geology, No. 18 Vien Street, Dong Ngac Ward, Hanoi 100000, Viet Nam;

  • d. Department of Chemistry, Vinh University, 182 Le Duan, Truong Vinh Ward, Nghe An 43000, Viet Nam;

  • e. Department of Engineering, Faculty of Engineering, Kyushu Institute of Technology, 1-1 Sensui-cho, Tobata-ku, Kitakyushu-shi, Fukuoka 804-8550, Japan;

  • f. Collaborative Research Centre for Green Materials on Environmental Technology, Kyushu Institute of Technology, Fukuoka 808-0196, Japan;

  • g. Faculty of Physics and Chemical Engineering, Le Quy Don Technical University, 236 Hoang Quoc Viet, Nghia Do Ward, Hanoi 100000, Viet Nam

Funds:

This work was supported by the Vietnam Academy of Science and Technology (Grant No. VAST07.03/23-24).

  • Received Date: 2024-12-19
  • Accepted Date: 2025-08-04
    • Available Online: 2025-12-03
    Abstract
  • The growing prevalence of emerging pollutants has spurred increasing research interest in developing novel materials for treatment. In this study, a Z-scheme Bi2MoO6/g-C3N4 (BMCN) photocatalyst was facilely synthesized via a solvothermal technique and employed to activate peroxydisulfate (PDS) under visible light irradiation. The system of the BMCN photocatalyst with 20% g-C3N4 (BMCN-20) combined with PDS under visible light irradiation (BMCN-20/PDS-Vis) achieved 89.04% ciprofloxacin (CFX) degradation within 90 min. PDS acted as an electron scavenger, suppressing recombination of photo-generated electron-hole pairs and enhancing CFX degradation via additional SO·-4 formation. The CFX degradation rate constant of the BMCN-20/PDS/Vis system was 1.33 and 2.31 times greater than those of Bi2MoO6/PDS and g-C3N4/PDS, respectively, attributed to efficient electron transfer with the Z-scheme BMCN-20. Scavenging experiments identified 1O2, O·-2, and h+ as the primary reactive species driving CFX degradation. Mass spectrometry and density functional theory analyses confirmed the degradation pathways and revealed degradation intermediates. These findings demonstrate the potential of the BMCN-20/PDS/Vis system as an effective and environmentally friendly approach for antibiotic removal from wastewater.

     

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