Characteristics of Silver Nanoparticles in Different pH Values

• Autorzy: Mražíková A. , Velgosová O. , Kavuličová J. , Matvija M. , Čižmárová E. , Willner J.

Identyfikatory

DOI

10.24425/122433

• Języki publikacji: EN

Abstrakty

EN

Stability of silver nanoparticles strongly influences the potential of their application. The literature shows wide possibilities of nanoparticles preparation, which has significantly impact on their properties. Therefore, the improvement of AgNPs preparation plays a key role in the case of their practical use. The pH values of the environment are one of the important factors, which directly influences stability of AgNPs. We present a comparing study of the silver nanoparticles prepared by „bottom-up“ methods over by chemical synthesis and biosynthesis using AgNO₃ (0.29 mM) solution. For the biosynthesis of the silver nanoparticles, the green freshwater algae Parachlorella kessleri and Citrus limon extracts were used as reducing and stabilizing agents. Chemically synthesized AgNPs were performed using sodium citrate (0.5%) as a capping agent and 0.01% gelatine as a reducing agent. The formation and long term stability of those silver nanoparticles synthesized either biologically and chemically were clearly observed by solution colour changes and confirmed by UV-vis spectroscopy. The pH values of formed nanoparticle solutions were 3 and 5.8 for biosynthesized AgNPs using extract of Citrus limon and Parachlorella kessleri, respectively and 7.2 for chemically prepared AgNPs solution using citrate. The SEM as a surface imaging method was used for the characterization of nanoparticle shapes, size distribution and also for resolving different particle sizes. These micrographs confirmed the presence of dispersed and aggregated AgNPs with various shapes and sizes.

Słowa kluczowe

EN

Ag nanoparticles; particle size; stability; pH

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 2
• Strony: 993--998
• Opis fizyczny: Bibliogr. 29 poz., fot., rys., wykr.

Twórcy

autor

Mražíková A.

• Technical University in Kosice, Institute of Materials and Quality Engineering, Kosice, Slovakia

autor

Velgosová O.

• Technical University in Kosice, Institute of Materials and Quality Engineering, Kosice, Slovakia

autor

Kavuličová J.

• Technical University in Kosice, Institute of Metallurgy, Kosice, Slovakia

autor

Matvija M.

• Technical University in Kosice, Institute of Materials and Quality Engineering, Kosice, Slovakia

autor

Čižmárová E.

• Technical University in Prague, Department of Materials Engineering, Prague, Czech Republic

autor

Willner J.

• Silesian University of Technology, Department of Extractive Metallurgy and Environmental Protection, Katowice, Poland

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Uwagi

EN

1. This work was supported the Ministry of Education, Youth and Sport of the Czech Republic within the project No. LO1207 of the programme NPU1.

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).