A novel ternary Fe(III)-SrTiO3-GO nanocomposite for LED-light-driven photocatalytic degradation of norfloxacin antibiotic: Performance, mineralization ability, degradation pathway, and mechanistic insight

[Display omitted] •A new durable and reusable ternary photocatalyst Fe(III)-SrTiO3-GO was fabricated.•Efficient degradation and mineralization of toxic NOF contaminant under LED light.•Fe and GO synergism upgrades light absorptivity and charge transference in SrTiO3.•h+ and OH were identified as the...

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Veröffentlicht in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2024-01, Vol.479, p.147685, Article 147685
Hauptverfasser: Passi, Manjusha, Pal, Bonamali
Format: Artikel
Sprache:eng
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Zusammenfassung:[Display omitted] •A new durable and reusable ternary photocatalyst Fe(III)-SrTiO3-GO was fabricated.•Efficient degradation and mineralization of toxic NOF contaminant under LED light.•Fe and GO synergism upgrades light absorptivity and charge transference in SrTiO3.•h+ and OH were identified as the dominant species for NOF degradation.•Probable mechanism, NOF degradation pathway were elucidated based on LC-MS results. The widespread production and use of pharmaceutical antibiotics is wreaking havoc on the environment. To address this issue, a semiconductor photocatalyst with high photocatalytic efficiency must be developed in order to eliminate antibiotics from wastewater. Herein, an efficient ternary photocatalyst (Fe(III)-SrTiO3-GO) was synthesized by anchoring Fe(III) species and GO sheets over the surface of SrTiO3 nanocubes. The optimized (2Fe(III)-SrTiO3-10GO) nanocomposite displayed superior photoactivity by degrading 92.3 % of NOF within 120 min of LED light exposure in contrast with pristine SrTiO3, (33.6 %) and binary composites (SrTiO3-10GO) (68.5% ), (2Fe(III)-SrTiO3) (79.2% ). The meliorative performance is credited to synergic effects of GO (with high conductivity), SrTiO3 (specialized morphology) and Fe(III) species (IFCT effect) all together in the trio-hybrid that accelerated the transference and separation of photoinduced carriers, and extends the visible-light responsive range. (h+), (OH) were the predominant reactive species liable for the degradation process. Further, the plausible photocatalytic mechanism and degradation pathways of NOF were speculated with several intermediates identified. The current study provide a new perspective on construction of innovative, reusable and cost-effective photocatalyst based on transition metal ion and GO co-catalyzed metal titanates for wastewater remediation.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2023.147685