Photodegradation of ibuprofen using CeO2 nanostructured materials: Reaction kinetics, modeling, and thermodynamics

Gallucci, Noemi; Hmoudah, Maryam; Martínez, E.; El‐Qanni, Amjad; Serio, Martino Di; Paduano, Luigi; Vitiello, Giuseppe; Russo, Vincenzo

doi:10.1016/j.jece.2022.107866

Cited by 22 publications

(5 citation statements)

References 41 publications

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“…The samples to be measured were prepared by soaking the proper copper grid used for TEM measurements (400 mesh with a thin carbon film) in an aqueous suspension of the nanoparticles with the concentration set at 0.5 mg/mL. Time evolution of the colloidal stability and self-aggregation process of the BG/WSNs systems during the immobilization process was monitored by DLS measurements. , A homemade experimental set up, composed of a Photocor compact goniometer (Moscow, Russia), a SMD 6000 laser Quantum 50 mW light source (Laser Quantum, Fremont, CA) operating at 532.5 Å, a photomultiplier (PMT-120-OP/B), and a correlator (Flex02–01D) from (Shenzhen, China) was used. The experimental temperature was fixed to the room value (25 °C), while the scattering angle θ was set at 130°.…”

Section: Methodsmentioning

confidence: 99%

Controlling the Adsorption of β-Glucosidase onto Wrinkled SiO₂ Nanoparticles To Boost the Yield of Immobilization of an Efficient Biocatalyst

et al. 2023

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β-Glucosidase (BG) catalyzes the hydrolysis of cellobiose to glucose, a substrate for fermentation to produce the carbon-neutral fuel bioethanol. Enzyme thermal stability and reusability can be improved through immobilization onto insoluble supports. Moreover, nanoscaled matrixes allow for preserving high reaction rates. In this work, BG was physically immobilized onto wrinkled SiO 2 nanoparticles (WSNs). The adsorption procedure was tuned by varying the BG:WSNs weight ratio to achieve the maximum controllability and maximize the yield of immobilization, while different times of immobilization were monitored. Results show that a BG:WSNs ratio equal to 1:6 wt/wt provides for the highest colloidal stability, whereas an immobilization time of 24 h results in the highest enzyme loading (135 mg/g of support) corresponding to 80% yield of immobilization. An enzyme corona is formed in 2 h, which gradually disappears as the protein diffuses within the pores. The adsorption into the silica structure causes little change in the protein secondary structure. Furthermore, supported enzyme exhibits a remarkable gain in thermal stability, retaining complete folding up to 90 °C. Catalytic tests assessed that immobilized BG achieves 100% cellobiose conversion. The improved adsorption protocol provides simultaneously high glucose production, enhanced yield of immobilization, and good reusability, resulting in considerable reduction of enzyme waste in the immobilization stage.

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Section: Methodsmentioning

confidence: 99%

Controlling the Adsorption of β-Glucosidase onto Wrinkled SiO₂ Nanoparticles To Boost the Yield of Immobilization of an Efficient Biocatalyst

et al. 2023

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“…The scattered intensity correlation function was analyzed using a regularization algorithm [ 22 ]. The diffusion coefficient of each population of diffusing particles was calculated as the z-average of the diffusion coefficients of the corresponding distributions [ 23 , 24 , 25 ]. The culture media used for NP biosynthesis were taken as blanks.…”

Section: Methodsmentioning

confidence: 99%

Extremophilic Microorganisms for the Green Synthesis of Antibacterial Nanoparticles

et al. 2022

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The biogenic synthesis of nanomaterials, i.e., synthesis carried out by means of living organisms, is an emerging technique in nanotechnology since it represents a greener and more eco-friendly method for the production of nanomaterials. In this line, in order to find new biological entities capable of biogenic synthesis, we tested the ability of some extremophilic microorganisms to carry out the biogenic production of AgNPs and SeNPs. Silver NPs were produced extracellularly by means of the thermophilic Thermus thermophilus strain SAMU; the haloalkaliphilic Halomonas campaniensis strain 5AG was instead found to be useful for the synthesis of SeNPs. The structural characterization of the biogenic nanoparticles showed that both the Ag and Se NPs possessed a protein coating on their surface and that they were organized in aggregates. Moreover, both types of NPs were found be able to exert an interesting antibacterial effect against either Gram-positive or Gram-negative species. This study confirmed that extremophilic microorganisms can be considered valuable producers of biologically active nanoparticles; nevertheless, further experiments must be performed to improve the synthesis protocols in addition to the downstream processes.

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“…The designed reverse micelles synthesis route allows for obtaining a very high surface area compared, not only with different methods [33,106,112] but also with similar procedures reported in the literature [46,47].…”

Section: Structural Textural and Surface Propertiesmentioning

confidence: 98%

“…This simplification can be considered reasonable as we are interested in retrieving the order of magnitude of the kinetic constants to compare the activity of each catalyst. Further, the ibuprofen photolysis in the absence of the catalyst was neglected as proved experimentally [112]. Thus, the mass balance equation needs to be further modified, supposing that IBU* undergoes photodegradation, Eq.…”

Section: Tablementioning

confidence: 99%

Reverse Micelle Strategy for Effective Substitutional Fe-Doping in Small-Sized Ceo2 Nanocrystals: Assessment of Adsorption and Photodegradation Efficiency of Ibuprofen Under Visible Light

Tammaro,

Paparo,

Chianese

et al. 2023

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Photodegradation of ibuprofen using CeO2 nanostructured materials: Reaction kinetics, modeling, and thermodynamics

Cited by 22 publications

References 41 publications

Controlling the Adsorption of β-Glucosidase onto Wrinkled SiO₂ Nanoparticles To Boost the Yield of Immobilization of an Efficient Biocatalyst

Controlling the Adsorption of β-Glucosidase onto Wrinkled SiO₂ Nanoparticles To Boost the Yield of Immobilization of an Efficient Biocatalyst

Extremophilic Microorganisms for the Green Synthesis of Antibacterial Nanoparticles

Reverse Micelle Strategy for Effective Substitutional Fe-Doping in Small-Sized Ceo2 Nanocrystals: Assessment of Adsorption and Photodegradation Efficiency of Ibuprofen Under Visible Light

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Photodegradation of ibuprofen using CeO2 nanostructured materials: Reaction kinetics, modeling, and thermodynamics

Cited by 22 publications

References 41 publications

Controlling the Adsorption of β-Glucosidase onto Wrinkled SiO2 Nanoparticles To Boost the Yield of Immobilization of an Efficient Biocatalyst

Controlling the Adsorption of β-Glucosidase onto Wrinkled SiO2 Nanoparticles To Boost the Yield of Immobilization of an Efficient Biocatalyst

Extremophilic Microorganisms for the Green Synthesis of Antibacterial Nanoparticles

Reverse Micelle Strategy for Effective Substitutional Fe-Doping in Small-Sized Ceo2 Nanocrystals: Assessment of Adsorption and Photodegradation Efficiency of Ibuprofen Under Visible Light

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Controlling the Adsorption of β-Glucosidase onto Wrinkled SiO₂ Nanoparticles To Boost the Yield of Immobilization of an Efficient Biocatalyst

Controlling the Adsorption of β-Glucosidase onto Wrinkled SiO₂ Nanoparticles To Boost the Yield of Immobilization of an Efficient Biocatalyst