TY - JOUR
T1 - Bi2O2.33/Bi4O5I2-heterojunction photocatalysts for adsorption and visible light-driven degradation of pharmaceutical pollutants
AU - Ahmed, Adwaa
AU - Hezam, Abdo
AU - Rabeah, Jabor
AU - Kreyenschulte, Carsten
AU - Steinfeldt, Norbert
AU - Wohlrab, Sebastian
AU - Strunk, Jennifer
N1 - Publisher Copyright:
© 2024 The Authors
PY - 2025/2/1
Y1 - 2025/2/1
N2 - This study introduces the innovative Bi4O5I2/Bi2O2.33 heterojunction for diclofenac (DF) degradation. Pharmaceutical pollutants, especially DF, pose significant threats to water sources, necessitating efficient treatment methods. Bi2O2.33, renowned for its unique ferromagnetic properties, emerges as a promising photocatalyst for pollutant degradation. Bi4O5I2, known for strong visible light absorption and stability, holds potential for environmental applications. Interestingly, the inclusion of titanium dioxide (TiO2) in the composite catalysts significantly influences their observed ferromagnetic properties, as revealed by Electron Paramagnetic Resonance (EPR) spectroscopy, by influencing the interactions within the Bi4O5I2/Bi2O2.33 heterojunction and influencing its structure, morphology, and spin behavior. This interaction results in enhanced EPR and Ferromagnetic Resonance (FMR) signals, indicating intriguing spin interactions, polarization effects, charge transfers, surface dynamics, and stabilized magnetic domains. While the enhanced ferromagnetism holds promise for efficient charge separation and potential applications in environmental remediation, the expected boost in visible light-driven activity was not fully realized. This limitation is attributed to TiO2 inherent inability to directly absorb visible light, hindering its utilization for enhanced photocatalysis within the heterojunction. Nevertheless, these findings elucidate the multifaceted role of TiO2 in modulating the magnetic properties of these catalysts, offering valuable insights for future advancements in the design of advanced photocatalysts for effective environmental remediation.
AB - This study introduces the innovative Bi4O5I2/Bi2O2.33 heterojunction for diclofenac (DF) degradation. Pharmaceutical pollutants, especially DF, pose significant threats to water sources, necessitating efficient treatment methods. Bi2O2.33, renowned for its unique ferromagnetic properties, emerges as a promising photocatalyst for pollutant degradation. Bi4O5I2, known for strong visible light absorption and stability, holds potential for environmental applications. Interestingly, the inclusion of titanium dioxide (TiO2) in the composite catalysts significantly influences their observed ferromagnetic properties, as revealed by Electron Paramagnetic Resonance (EPR) spectroscopy, by influencing the interactions within the Bi4O5I2/Bi2O2.33 heterojunction and influencing its structure, morphology, and spin behavior. This interaction results in enhanced EPR and Ferromagnetic Resonance (FMR) signals, indicating intriguing spin interactions, polarization effects, charge transfers, surface dynamics, and stabilized magnetic domains. While the enhanced ferromagnetism holds promise for efficient charge separation and potential applications in environmental remediation, the expected boost in visible light-driven activity was not fully realized. This limitation is attributed to TiO2 inherent inability to directly absorb visible light, hindering its utilization for enhanced photocatalysis within the heterojunction. Nevertheless, these findings elucidate the multifaceted role of TiO2 in modulating the magnetic properties of these catalysts, offering valuable insights for future advancements in the design of advanced photocatalysts for effective environmental remediation.
KW - Composite catalyst
KW - Diclofenac
KW - Heterojunction
KW - Photocatalytic activity
UR - http://www.scopus.com/inward/record.url?scp=85206075499&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2024.115093
DO - 10.1016/j.cattod.2024.115093
M3 - Article
AN - SCOPUS:85206075499
SN - 0920-5861
VL - 445
JO - Catalysis Today
JF - Catalysis Today
M1 - 115093
ER -