Free-radical scavenging activity properties of ZnO sub-micron particles: size effect and kinetics
| Autor: | Ángel de Jesús Morales-Ramírez, Citlali Alejandra Marin-Flores, Rosario Ruiz-Guerrero, Margarita García-Hernández, Fernando Juárez-López, Odin Rodriguez-Nava |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Free Radical Scavenging Activity
Materials science Mining engineering. Metallurgy DPPH Kinetics Metals and Alloys Free radical scavenging properties TN1-997 ZnO particles Surfaces Coatings and Films Particle size effect Biomaterials chemistry.chemical_compound Scavenging kinetics chemistry Particle growth Ceramics and Composites Particle DPPH scavenging Irradiation Particle size Scavenging Nuclear chemistry |
| Zdroj: | Journal of Materials Research and Technology, Vol 13, Iss, Pp 1665-1675 (2021) |
| ISSN: | 2238-7854 |
| Popis: | ZnO particles were synthesized to evaluate the free radical scavenging activity properties of the particles as a function of the particle size. To obtain different particle diameters, the product was heat-treated at 600 °C for 2, 72, and 168 h to promote particle growth, obtaining a d50 of 132, 275, and 403 nm, respectively. The free radical scavenging activity was estimated by a 2,2 diphenyl-1-picrylhydrazyl (DPPH) assay, under UV irradiation. The kinetics of the scavenging reaction was monitored for the three different sizes and four ZnO particle concentrations at different reaction times; we found increases at lower particles size, and a relatively low ZnO dosage of 200 μg mL−1. The results showed that the reaction probably presented a pseudo-first-order kinetics model, with Ea = 3.2 kcal mol−1. Finally, we calculated the EC50 for the 132-μm particles to be 97.65 μg/mL. |
| Databáze: | OpenAIRE |
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