Maqola

Fabrication of SiW9Co3–Bi4O5Br2 photocatalysts with improved charge separation for visible-light-driven hydrogen evolution and metronidazole degradation: Characterization, mechanism, and toxicity assessment

Rahila BatulDepartment of Pharmaceutical Chemistry, College of pharmacy, University of Hail, Saudi ArabiaWaqed H. HassanAdvanced Technical College, University of Warith Al-Anbiyaa, Karbala, IraqDheyaa J. JasimCollege of Engineering, University of Al Maarif, Al Anbar,31001, IraqPradeep Kumar SinghDepartment of Mechanical Engineering, Institute of Engineering & Technology, GLA University, Mathura, UP, 281406, IndiaShatha A. AldaghfagDepartment of Physics, College of Sciences, Princess Nourah bint Abdulrahman University, P. O. Box 84428, Riyadh, 11671, Saudi ArabiaMohamed AyadiDepartment of Mathematics, College of Science, Majmaah University, Al-Majmaah, 11952, Saudi ArabiaIbrahm MahariqApplied Science Research Center, Applied Science Private University, Amman, JordanMukhtorjon KarimovUrgench State University, 14, Kh. Alimdjan str, Urgench, 220100, UzbekistanOtabek MukhitdinovKimyo International University in Tashkent, Shota Rustaveli str. 156, Tashkent, 100121, UzbekistanAlisher AbduvokhidovNational Research University TIIAME, Kori Niyoziy 39, Tashkent 100000, UzbekistanReda A. HaggamDepartment of Chemistry, Faculty of Science, Islamic University of Madinah, Madinah, 42351, Saudi Arabia

Journal of Water Process Engineeringjournal2026en

ABI

Annotatsiya

The rational design of efficient photocatalysts for clean energy generation and environmental remediation remains a significant challenge. In this study, a novel SiW 9 Co 3 –Bi 4 O 5 Br 2 heterostructure photocatalyst was successfully synthesized using a simple hydrothermal–self-assembly method. The structural, morphological, and optical properties were thoroughly investigated using techniques such as XRD, FTIR, Raman, XPS, SEM, TEM, and UV–Vis DRS. SiW 9 Co 3 clusters were uniformly anchored on the surface of Bi 4 O 5 Br 2 nanosheets, forming heterojunction interfaces that facilitated charge transfer and suppressed electron–hole recombination. Under visible light, the optimized SiW 9 Co 3 –Bi 4 O 5 Br 2 (20 wt%) composite exhibited superior photocatalytic performance, achieving H 2 evolution rate of 570 μmol·g −1 ·h −1 , significantly higher than that of pristine Bi 4 O 5 Br 2 . Simultaneously, 98.05 % of metronidazole (25 mg·L −1 ) was degraded within 80 min. Radical scavenging and ESR results confirmed that •O 2 − and •OH were the dominant species responsible for H 2 generation and pollutant degradation. The Z -scheme mechanism was proposed, where photogenerated electrons in SiW 9 Co 3 reduce H + to H 2 , while holes in Bi 4 O 5 Br 2 oxidize metronidazole. Additionally, the photocatalyst demonstrated high stability, with minimal performance degradation after five cycles, and XRD confirmed its structural integrity after cycling, supporting its potential for long-term, sustainable applications in both energy and environmental fields. • SiW 9 Co 3 –Bi 4 O 5 Br 2 composite enhances photocatalytic H 2 production and MET degradation efficiency. • The composite material shows superior charge separation, enhancing photocatalytic performance. • The SWC0.2-BOB composite outperforms individual components in MET concentration. • Attained a high hydrogen evolution rate of 570 μmol g −1 ·h −1 under visible light. • The photocatalyst maintains 80 % of its activity after five consecutive photocatalytic cycles.

Hali tarjima qilinmagan

Mavzular

Advanced Photocatalysis Techniques Multiferroics and related materials TiO2 Photocatalysis and Solar Cells

Identifikatorlar

DOI: 10.1016/j.jwpe.2026.109471

Iqtiboslar va manbalar

4 ta iqtibos 73 ta foydalanilgan manba

Koʻrsatkichlar — AkademScholar · Tez orada