Green synthesis of Ag/Ag2O nanoparticles on cellulose paper and cotton fabric using Eucalyptus globulus leaf extracts: Toward the clarification of formation mechanism

• Published in: Surfaces and interfaces 2023-08, Vol.40, p.102928, Article 102928
• Main Authors: Salgado, Pablo, Bustamante, Luis, Carmona, Danilo J., Meléndrez, Manuel F., Rubilar, Olga, Salazar, Claudio, Pérez, Andy J., Vidal, Gladys
• Format: Article
• Language: English
• Subjects: Antibacterial activity; Green synthesis; Phenolic compounds; Photocatalytic activity; Support effect
• ISSN: 2468-0230; 2468-0230
• DOI: 10.1016/j.surfin.2023.102928

•AgNP coating on fabric and paper by using E. globulus leaf extract was successfully fabricated.•Derived from gallic acid are the main phenolic compounds that act as reducing agents.•The pH change of the system due to the presence of NaOH would influence the mechanism by which Ag and/or Ag2O are formed.•The support used (paper or fabric), it would influence the concentration of AgNPs formed, the consumption of phenolic compounds, the antibacterial activity and band-gap of AgNPs synthesized. The present study reports on phenolic compounds profile of Eucalyptus globulus leaf extracts and exhibiting their role in obtaining silver nanoparticles (AgNP) by a green method on paper and fabric supports with or without addition of NaOH. To know the mechanism involved in the formation of AgNP, FTIR, UV–Visible spectrophotometry and UHPLC-QTOF-MS analyzes were carried out of E. globulus extracts before and after the synthesis of AgNP. The FTIR, UV–Visible spectrophotometry analyzes identified phenolic compounds, and to a lesser extent reducing sugars mainly participate as reducing agents in the formation of AgNP, while phenolic compounds would participate as stabilizing agents. UHPLC-QTOF-MS analyzes identified derived from gallic acid play an important role in AgNP formation. AgNPs were characterized in their morphology and structure by SEM-EDS, TEM-SAED, XRD, UV–Vis diffuse reflectance and TGA. The results indicate the formation of Ag and/or Ag2O nanoparticles depending on the influence of NaOH in the reaction system. Furthermore, the support used (paper or fabric), it would influence the concentration of AgNPs formed, the consumption of phenolic compounds, the antibacterial activity and band-gap of AgNPs synthesized. This study provides evidence of a simple process to support AgNP on cellulose and providing key information towards the definitive clarification of the mechanism of formation of AgNP by green synthesis. [Display omitted]