Enhanced photocatalytic performance of a dual Z-scheme P-doped g-C3N4/BiOBr/CdS heterojunction towards textile dye degradation via efficient interfacial charge separation
Journal of the Taiwan Institute of Chemical Engineers, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.jtice.2026.107045
- 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, INSPEC, Engineering Source (EBSCO)
- Anahtar Kelimeler: Congo red, Degradation, Dual Z-scheme, Methylene blue, PCN/BOB/CdS, Photocatalysis
- Sivas Cumhuriyet Üniversitesi Adresli: Evet
Özet
Background The efficient utilization of solar energy through photocatalysis has emerged as a promising strategy for sustainable wastewater treatment, particularly for the degradation of persistent textile dyes. In this study, a dual Z-scheme P-doped g-C3N4/BiOBr/CdS (PCN/BOB/CdS) heterojunction was developed to enhance visible-light harvesting, charge separation, and photocatalytic performance. Methods P-doped g-C3N4 (PCN) was synthesized by thermal polycondensation, while BiOBr (BOB) and CdS were prepared via a co-precipitation method. The binary PCN/BOB heterojunction was fabricated through an in-situ process, followed by physical mixing with CdS to construct the ternary dual Z-scheme PCN/BOB/CdS photocatalyst. The structural, optical, photocatalytic properties, radical trapping and recycling experiments were conducted to investigate the degradation mechanism and long-term stability. Significant findings The optimized PCN/BOB/CdS heterojunction achieved 98% degradation of MB within 45 min and 81% degradation of CR within 120 min under visible-light irradiation. Radical scavenging experiments identified superoxide (•O2⁻) and hydroxyl (•OH) radicals as the dominant reactive species responsible for dye degradation. Furthermore, the photocatalyst retained excellent reusability after five consecutive cycles, maintaining degradation efficiencies of approximately 92% for MB and 73% for CR, demonstrating its outstanding stability and strong potential for practical wastewater treatment applications.