Defect-mediated time-efficient photocatalytic degradation of methylene blue and ciprofloxacin using tungsten-incorporated ternary perovskite BaSnO3 nanoparticles

• Published in: Chemosphere (Oxford) Vol. 351; p. 141128
• Main Authors: Jayavelu, Yuvashree, Maharana, Gouranga, Rajender, Gone, Muniramaiah, Reddivari, Divyadharshini, S., Baby, Benjamin Hudson, Kovendhan, M., Fernandes, Jean Maria, Joseph, D. Paul
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2024
• Subjects: BaSnO3; Ciprofloxacin; Methylene blue; Photocatalysis; Ternary perovskite; Tungsten; BaSnO3; Ciprofloxacin; Photocatalysis; Tungsten; Methylene blue; Ternary perovskite
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2024.141128

Photocatalytic water purification has been extensively explored for its economic, eco-friendly, and sustainable aspects. In this study, tungsten (W) incorporated BaSn1-xWxO3 (x = 0 to 0.05) nanoparticles synthesized by facile hydrogen peroxide precipitation route has been demonstrated for photocatalytic degradation of methylene blue (MB) dye and ciprofloxacin (CIP) antibiotic. The structural analysis indicates the presence of hybrid composite-like nanostructures with reduced crystallinity. Optical studies reveal blueshift in bandgap and decrease in oxygen vacancy defects upon W-incorporation. Pure BaSnO3 shows overall enhanced photocatalytic activity towards MB (90.22%) and CIP (78.12%) after 240 min of white LED light and sunlight irradiation respectively. The 2 % W-incorporated BaSnO3 shows superior photocatalytic degradation of MB (26.89%) and CIP (45.14%) within first 30 min of irradiation confirming the presence of W to be beneficial in the process. The free radical study revealed the dominant role of reactive hole (h+) and oxygen radical (O2•−) species during photodegradation and their intermediates are investigated to elucidate the degradation mechanism of MB within 30 min of irradiation. This study is promising towards developing defect mediated and time-efficient photocatalysts for environmental remediation. [Display omitted] •W incorporation at the Sn sites of BaSnO3 by facile H2O2 route has been explored for the first time.•W incorporated BaSnO3 showed blue shift with highest bandgap of 4.6 eV for 2 % sample.•All W incorporated samples showed higher electrophoretic mobility than pure BaSnO3.•2% W incorporated sample showed ∼27% of MB and ∼45.14% of CIP degradation within 30 min.•Defect mediated mechanism helps in time and energy-efficient photocatalysis.