Biosynthesis of Gold Nanoparticles Using Extracts of Terminalia Catappa, Hippocratea Excelsa, and Biodegradable Polymers (Pluronic F127 And P103)
Tepale, N., Flores-Aquino, E., Fernández-Escamilla, V., Conde-Hernández, L., Estrada-Girón, Y. (2025). Biosynthesis of Gold Nanoparticles Using Extracts of Terminalia Catappa, Hippocratea Excelsa, and Biodegradable Polymers (Pluronic F127 And P103). EKB Journal Management System, 68(6), 91-102. doi: 10.21608/ejchem.2024.297606.9875
Nancy Tepale; Eric Flores-Aquino; Víctor V.A. Fernández-Escamilla; Lilia Alejandra Conde-Hernández; Yokiushirdhilgilmara Estrada-Girón. "Biosynthesis of Gold Nanoparticles Using Extracts of Terminalia Catappa, Hippocratea Excelsa, and Biodegradable Polymers (Pluronic F127 And P103)". EKB Journal Management System, 68, 6, 2025, 91-102. doi: 10.21608/ejchem.2024.297606.9875
Tepale, N., Flores-Aquino, E., Fernández-Escamilla, V., Conde-Hernández, L., Estrada-Girón, Y. (2025). 'Biosynthesis of Gold Nanoparticles Using Extracts of Terminalia Catappa, Hippocratea Excelsa, and Biodegradable Polymers (Pluronic F127 And P103)', EKB Journal Management System, 68(6), pp. 91-102. doi: 10.21608/ejchem.2024.297606.9875
Tepale, N., Flores-Aquino, E., Fernández-Escamilla, V., Conde-Hernández, L., Estrada-Girón, Y. Biosynthesis of Gold Nanoparticles Using Extracts of Terminalia Catappa, Hippocratea Excelsa, and Biodegradable Polymers (Pluronic F127 And P103). EKB Journal Management System, 2025; 68(6): 91-102. doi: 10.21608/ejchem.2024.297606.9875

Biosynthesis of Gold Nanoparticles Using Extracts of Terminalia Catappa, Hippocratea Excelsa, and Biodegradable Polymers (Pluronic F127 And P103)

Egyptian Journal of Chemistry
Volume 68, Issue 6, June 2025, Page 91-102  XML PDF (766.64 K)
Document Type: Original Article
DOI: 10.21608/ejchem.2024.297606.9875
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Authors
Nancy Tepale email orcid 1; Eric Flores-Aquinoorcid 2; Víctor V.A. Fernández-Escamillaorcid 3; Lilia Alejandra Conde-Hernándezorcid 1; Yokiushirdhilgilmara Estrada-Girónorcid 4
1Department of Chemical Engineering, Benemérita Universidad Autónoma de Puebla, Puebla, México
2Laboratorio de Catálisis, CNyN, Universidad Nacional Autónoma de México, Ensenada BC, México
3Department of Technological Sciences, CUCIENEGA, Universidad de Guadalajara, Jalisco, México
4Department of Chemical Engineering, CUCEI, Universidad de Guadalajara, Jalisco, México
Abstract
This study aimed to synthesize gold nanoparticles (AuNPs) using Terminalia catappa (TC) and Hippocratea excelsa (HE) extracts as reducing agents and a triblock copolymer Pluronic (F127 and P103) as the stabilizing agent. The formation of AuNPs was monitored by UV-visible spectroscopy, showing a signature peak between 530 and 540 nm, which corresponds to the Surface Plasmon Resonance (SPR) of AuNPs. As time progressed, the AuNPs synthesized only with the plant extracts showed a decrease in absorbance attributed to particle agglomeration. However, the addition of the copolymer in the reaction changed the behavior of the SPR, and the absorbance level remained almost constant, suggesting stability. This behavior was corroborated by Transmission electron microscopy (TEM). Micrographs showed well-separated spherical nanoparticles when TC extract was used (10-50 nm). However, AuNPs synthesized with HE extract showed spherical templates on whose surface smaller NPs were formed (~10 nm). The hydrodynamic diameter obtained by Dynamic light scattering (DLS) suggests that the biomolecules of the extract and polymer are attached to the nanoparticles. In addition, polyphenols and sesquiterpenes, responsible molecules for reducing Au3+ and copolymer signals were identified by Fourier transform infrared (FTIR). The results suggest that the copolymer promotes the stability of colloidal solutions and could modify the morphology of AuNPs.
Keywords
Green synthesis; Triblock Copolymer; Extract Plant; Gold Nanoparticles; Stability
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