Influences of Plasma Plume Length on Structural, Optical and Dye Degradation Properties of Citrate-Stabilized Silver Nanoparticles Synthesized by Plasma-Assisted Reduction

Citrate-capped silver nanoparticles (Ag@Cit NPs) were synthesized by a simple plasma-assisted reduction method. Homogenous colloidal Ag@Cit NPs solutions were produced by treating a AgNO3-trisodium citrate-deionized water with an atmospheric-pressure argon plasma jet. The plasma-synthesized Ag@Cit N...

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Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2022-07, Vol.12 (14), p.2367
Main Authors: Acharya, Tirtha Raj, Lee, Geon Joon, Choi, Eun Ha
Format: Article
Language:English
Subjects:
Absorption spectra
Aqueous solutions
Argon plasma
citrate
Citric acid
Degradation
Deionization
Dyes
Electrodes
Electrons
Gamma rays
Gases
Hydrogen
Methylene blue
Nanoparticles
Nitrogen
Optical properties
Particle size
Plasma
Plasma jets
plasma synthesis
plasma-treated water
plasmon
Polyvinyl alcohol
reactive oxygen species
Reduction
Silver
silver nanoparticles
Silver nitrate
Sodium citrate
Surface plasmon resonance
Synthesis
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Summary:Citrate-capped silver nanoparticles (Ag@Cit NPs) were synthesized by a simple plasma-assisted reduction method. Homogenous colloidal Ag@Cit NPs solutions were produced by treating a AgNO3-trisodium citrate-deionized water with an atmospheric-pressure argon plasma jet. The plasma-synthesized Ag@Cit NPs exhibited quasi-spherical shape with an average particle diameter of about 5.9−7.5 nm, and their absorption spectra showed surface plasmon resonance peaks at approximately 406 nm. The amount of Ag@Cit NPs increased in a plasma exposure duration-dependent manner. Plasma synthesis of Ag@Cit NPs was more effective in the 8.5 cm plume jet than in the shorter and longer plume jets. A larger amount of Ag@Cit NPs were produced from the 8.5 cm plume jet with a higher pH and a larger number of aqua electrons, indicating that the synergetic effect between plasma electrons and citrate plays an important role in the plasma synthesis of Ag@Cit NPs. Plasma-assisted citrate reduction facilitates the synthesis of Ag@Cit NPs, and citrate-capped nanoparticles are stabilized in an aqueous solution due to their repulsive force. Next, we demonstrated that plasma-synthesized Ag@Cit NPs exhibited a significant degradation of methylene blue dye.
ISSN:2079-4991
2079-4991
DOI:10.3390/nano12142367