Constructing oxygen vacancy enriched ZnWO4/Ag-doped In2S3 visible light active S-scheme heterojunction with improved charge migration for doxycycline hydrochloride degradation in wastewater

Soni V., Sonu S., Singh P., Ahamad T., Katin K. P., KAYA S., ...Daha Fazla

Colloids and Surfaces A: Physicochemical and Engineering Aspects, cilt.727, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 727
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.colsurfa.2025.138466
  • Dergi Adı: Colloids and Surfaces A: Physicochemical and Engineering Aspects
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Compendex, EMBASE, INSPEC
  • Anahtar Kelimeler: Charge transfer, DCL.HCl degradation, Doping, Interfacial coupling, Oxygen vacancies, Photocatalysis, Synergistic effects
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

This research examined photocatalytic efficacy of an Ov-ZnWO4/Ag-In2S3 heterojunction that we generated using a hydrothermal process and a chemical solution method for the degrading doxycycline hydrochloride in waste water. When exposed to visible light for 90 min., nanocomposite showed an significant 94.91 % degrading efficacy. Modification strategies like oxygen vacancies, doping, and interfacial coupling all worked to enhance charge carrier transfer and isolation. The generation of an S-scheme heterojunction was established by a systematic charge migration mechanism that was supported by both theoretical as well as experimental research. An in-built internal electric field was generated by redistribution of charges brought on by differences in position of Fermi levels, which allowed for directed e- flow while improving isolation rate. The functions of •OH and •O2- reactive oxygen species in degrading DCL.HCl were analysed by EPR and trapping studies. Moreover, electronic characteristics and mineralization process of DCL.HCl were studied by DFT calculations, and LC-MS studies. Stability and reusability of Ov-ZnWO4/Ag-In2S3 were demonstrated when it was evaluated for reutilizing over four consecutive cycles, preserving 89 % of its initial degrading efficacy. A viable choice for wastewater treatment applications, Ov-ZnWO4/Ag-In2S3 nanocomposite is made by scalable process and has superior charge carrier dynamics, recyclability, and redox potential.