Produção Nacional
Revisado por pares
Effect of the amapá-latex chelating agent contents on the microstructure and photocatalytic properties of ZnO nanoparticles
2022; Elsevier BV; Volume: 22; Linguagem: Inglês
10.1016/j.jmrt.2022.12.119
ISSN2214-0697
AutoresRobert Saraiva Matos, John M. Attah-Baah, Michael Douglas Santos Monteiro, B. F. O. Costa, M.A. Macêdo, Romualdo S. Silva, Henrique Duarte da Fonseca Filho, Rosane Maria Pessoa Betânio Oliveira, Nilson S. Ferreira,
Tópico(s)Pigment Synthesis and Properties
ResumoHerein, 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.
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