| Autor: |
Robert S. Matos, John M. Attah-Baah, Michael D.S. Monteiro, Benilde F.O. Costa, Marcelo A. Mâcedo, Romualdo S. Silva Junior, Henrique D. da Fonseca Filho, Rosane M.P.B. Oliveira, Nilson S. Ferreira |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Research and Technology, Vol 22, Iss , Pp 2673-2689 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2022.12.119 |
| Popis: |
Herein, we have explored the defects-driven photocatalytic properties of ZnO nanoparticles synthesized using different sweet Amapá-latex contents as natural chelating agents. XRD, SAED, and FTIR analyses confirmed the formation of single-phase ZnO nanoparticles. TEM analysis showed nanoparticles with strong polycrystalline nature and average particle size ranging from 14.1 to 16.5 nm, with the smaller particle size (ZnO#10) exhibiting a larger surface area. The pentacyclic triterpenes present in Amapá-latex chelating agents play a critical role in the complexation of Zn2+ ions and the formation of pure ZnO nanostructures. The broad photoluminescence spectra revealed several structural defects in the nanoparticles, particularly, VZn, VO++, Oi+, and ZnO were widely observed for the sample synthesized using 10 mL of Amapá-latex (ZnO#10). A 99.47% visible-light-mediated discoloration of the aqueous methylene blue dye solution containing ZnO#10 nanoparticles was mainly ascribed to the continuous production of hydroxyl radicals by the defective structure of this sample. Furthermore, a ∼30% TOC removal was observed after the 5th cycle of reuse of ZnO#10 nanoparticles, proving that the production of reactive species cleaves and breaks down MB dye molecules. Thus, the sweet Amapá-latex proved to be an effective chelating agent for obtaining ZnO nanoparticles with singular optical-structural characteristics that can be useful for treating dye-contaminated textile effluents. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
