Hierarchical fibrous HY zeolite-supported TiO2/CdS for enhanced photocatalytic degradation of acetaminophen (ACE)

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1. Nur Syahirah, Kamarudin and Nurul Nassuha, Yaakob and Nuramira Fateha, Sukor and Herma Dina, Setiabudi and Mohamad Afiq Hakimie, Aziz and Rohayu, Jusoh (2026) Dual-role deep eutectic solvent-assisted electrosynthesis of TiO2/KCC-1 for enhanced visible-light photocatalytic desulfurization. Arabian Journal for Science and Engineering. pp. 1-20. ISSN 2193-567X (Print); 2191-4281 (Online). (In Press / Online First) (In Press / Online First)
URL: https://umpir.ump.edu.my/id/eprint/47286
UMPSA-IR ID : 47286
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The escalating pollution of aquatic ecosystems by pharmaceutical pollutants, notably acetaminophen (ACE), necessitates the advancement of sophisticated and effective remediation technologies. This study presents a direct Z-scheme TiO2/CdS photocatalyst supported on hierarchical fibrous HY zeolite (TiO2/CdS/FHY), synthesised via controlled electrolysis in a deep eutectic solvent followed by ultrasonic probe-assisted impregnation. The unique hierarchical fibrous HY-zeolite scaffold, characterized by an inherent meso–macroporous framework (81.5 m2/g) and demonstrated strong Ti–O–Si interfacial bonding, significantly enhanced nanostructure dispersion, facilitated charge separation, and suppressed electron-hole recombination, as evidenced by quenched photoluminescence. Optical characterization via UV–vis DRS revealed a red shift to 590 nm and a narrowed bandgap of 2.24 eV, enabling efficient visible-light harvesting. Under optimal conditions (10 wt% TiO2 loading, pH 5, 1.5 g/L catalyst dosage, 10 mg/L ACE concentration), TiO2/CdS/FHY achieved 86.4% ACE-degradation efficiency and retained > 79% activity over five cycles, with FTIR confirming structural stability. Quenching and band-edge analyses identified (e–/·O2–) and (·OH) radicals as the dominant oxidative species, corroborating a direct Z-scheme charge transfer pathway. This research highlights the significant potential of hierarchical fibrous HY zeolite supported TiO2/CdS nanostructures as an advanced support material for efficient photocatalytic degradation of emerging pharmaceutical contaminants.