TY - JOUR
T1 - Photodegradation of ibuprofen using CeO2nanostructured materials
T2 - Reaction kinetics, modeling, and thermodynamics
AU - Gallucci, Noemi
AU - Hmoudah, Maryam
AU - Martinez, Eugenie
AU - El-Qanni, Amjad
AU - Di Serio, Martino
AU - Paduano, Luigi
AU - Vitiello, Giuseppe
AU - Russo, Vincenzo
N1 - Funding Information:
The 12th executive program for scientific and technological cooperation between the Italian Republic and the Republic of Korea for the years 2019–2021 is acknowledged for financial support.
Publisher Copyright:
© 2022 Elsevier Ltd.
PY - 2022/6
Y1 - 2022/6
N2 - Ibuprofen is one the most used non-steroidal anti-inflammatory drug, which is considered an emerging pollutant that may contaminate surface and underground water. Photodegradation using nanomaterials is one of the most sustainable and cheap technologies that can be used in water purification. In this study, the photodegradation efficiency of in-house prepared ceria (CeO2) nanostructured materials towards ibuprofen was assessed under UV irradiation. CeO2 nanoparticles (NPs) were prepared through wet-chemical synthesis and characterized by several techniques. The photodegradation activity of the synthesized CeO2-NPs was compared to the commercial Aeroxide TiO2-P25. Small crystalline CeO2-NPs were obtained with about 15 nm particle size, band-gap of 3.1 eV with irregular morphology. The surface area of CeO2-NPs was estimated to be 76 ± 5 m2/g. Dynamic light scattering analysis revealed that these nanoparticles have a strong tendency to self-aggregate and to form clusters in aqueous suspension. The results showed a slightly better performance of Aeroxide TiO2-P25 compared to CeO2-NPs. On the other hand, five reusability tests confirmed the stability of CeO2-NPs in the reaction conditions, without any significant effect on their photodegradation activity. The goodness of the kinetic modeling of the experimental data was proven through the estimated kinetic parameters, together with the statistical information. The temperature effect confirmed that the higher the temperature, the greater the dissociation rate. Thus, there is a direct relationship between temperature, reaction rate, and the activation energy for each reaction. Furthermore, the thermodynamic parameters, namely: changes in Gibbs free energy ( G°), enthalpy ( H°), and entropy ( S°) have been reported revealing the efficient photodegradation performance of CeO2-NPs.
AB - Ibuprofen is one the most used non-steroidal anti-inflammatory drug, which is considered an emerging pollutant that may contaminate surface and underground water. Photodegradation using nanomaterials is one of the most sustainable and cheap technologies that can be used in water purification. In this study, the photodegradation efficiency of in-house prepared ceria (CeO2) nanostructured materials towards ibuprofen was assessed under UV irradiation. CeO2 nanoparticles (NPs) were prepared through wet-chemical synthesis and characterized by several techniques. The photodegradation activity of the synthesized CeO2-NPs was compared to the commercial Aeroxide TiO2-P25. Small crystalline CeO2-NPs were obtained with about 15 nm particle size, band-gap of 3.1 eV with irregular morphology. The surface area of CeO2-NPs was estimated to be 76 ± 5 m2/g. Dynamic light scattering analysis revealed that these nanoparticles have a strong tendency to self-aggregate and to form clusters in aqueous suspension. The results showed a slightly better performance of Aeroxide TiO2-P25 compared to CeO2-NPs. On the other hand, five reusability tests confirmed the stability of CeO2-NPs in the reaction conditions, without any significant effect on their photodegradation activity. The goodness of the kinetic modeling of the experimental data was proven through the estimated kinetic parameters, together with the statistical information. The temperature effect confirmed that the higher the temperature, the greater the dissociation rate. Thus, there is a direct relationship between temperature, reaction rate, and the activation energy for each reaction. Furthermore, the thermodynamic parameters, namely: changes in Gibbs free energy ( G°), enthalpy ( H°), and entropy ( S°) have been reported revealing the efficient photodegradation performance of CeO2-NPs.
KW - CeOnanoparticles
KW - Kinetic modeling
KW - Photodegradation
KW - Thermodynamics
UR - http://www.scopus.com/inward/record.url?scp=85130587796&partnerID=8YFLogxK
U2 - 10.1016/j.jece.2022.107866
DO - 10.1016/j.jece.2022.107866
M3 - Article
AN - SCOPUS:85130587796
SN - 2213-3437
VL - 10
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 3
M1 - 107866
ER -