Synergy between dual Z-scheme heterostructured Vo-Bi2WO6/Bi2S3/Ag2S@Chitosan for the effective degradation of fuchsin basic dye

Sharma K., Sonu S., Singh P., Ahmad T., KAYA S., Katin K. P., ...Daha Fazla

Journal of the Taiwan Institute of Chemical Engineers, cilt.175, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 175
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.jtice.2025.106265
  • Dergi Adı: Journal of the Taiwan Institute of Chemical Engineers
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Chemical Abstracts Core, Compendex, Computer & Applied Sciences, INSPEC
  • Anahtar Kelimeler: Chitosan, Dual Z-scheme, Fuchsin basic degradation, Oxygen vacancy, Vo-Bi2WO6/Ag2S/Bi2S3
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

Background: The current work investigates fuchsin basic photodegradation with visible light assistance as a potential solution for water contamination. The main goal is to modify the optoelectronic characteristic properties of Bi2WO6 through oxygen vacancy generation (OVs) and forming dual Z-scheme heterojunction with Ag2S and Bi2S3. Methods: The oxygen vacancy induced Bi2WO6/Ag2S/Bi2S3 chitosan supported heterojunction system provided directional charge transfer channels with remarkable degradation efficacy of 99.80 % within 80 min. The dual Z-scheme heterojunction was fabricated using combined hydrothermal, co-precipitation and ultrasonic dispersion method. The Vo-Bi2WO6/Ag2S/Bi2S3@chitosan system followed pseudo-first-order kinetics for FB degradation at 0.0552 min-1 rate constant which is comparatively higher to bare counterparts. Significant findings: The Vo-Bi2WO6/Ag2S/Bi2S3@Chitosan system possessed 99.80 % degradation for FB, whereas the Vo-Bi2WO6/Ag2S/Bi2S3, Vo-Bi2WO6/Ag2S, Vo-Bi2WO6, Bi2WO6, Ag2S, Bi2S3 possessed (96.08 %), (64.69 %), (39.64 %), (32.64 %), (23.49 %), (28.14 %), degradation rate for FB in 80 min. The density functional theory (DFT) investigations provided information on the energy bandgap analysis and structural configuration of the bare photocatalysts, which aligns well with the experimental results. Also, LC-MS analysis was employed to scrutinize the degraded products whilst, quenching experiment, and EPR results explicated the dual Z-scheme charge transfer mechanism. This work advances the rationally of designing oxygen vacancy-mediated dual Z-scheme system, which may have consequences for mitigating water pollution issues.