# Gold (Au), Silver (Ag) and Bimetallic Au/Ag Core-Shell Nanoparticles: Synthesis and Applications in 4-Nitrophenol Reduction Reactions
> Nurjannah

URL kanonis: https://discover.unhas.ac.id/publications/gold-au-silver-ag-and-bimetallic-auag-core-shell-nanoparticles-synthesis-and-app
Jurnal / Konferensi: Molekul
Tahun terbit: 2022
DOI: https://doi.org/10.20884/1.jm.2022.17.2.5456
ISSN: 19079761
Kuartil SJR: Q4
Citations: 0

## Authors
- Nurjannah

## Abstract
Au, Ag, and Au/Ag core-shell nanoparticles (NPs) were synthesized in aqueous solution by chemical reduction. UV-Vis absorption spectra confirmed a single surface plasmon resonance (SPR) peak for Au and Ag NPs, at 520 nm and 419 nm, respectively. Au/Ag core-shell NPs' UV-Vis spectra showed two distinct peaks at 385 and 480 nm, confirming a core-shell structure different from its alloy counterpart. Transmission electron microscopy (TEM) shows a relatively uniform spherical shape for both Au and core-shell Au/Ag NPs, while Ag NPs have a variety of forms such as a prism, rod, and spherical. The average size of the synthesized nanoparticles was quite similar, between 18 and 25 nm. The 4-nitrophenol reduction reaction model was used to study the catalytic ability of nanoparticles where Au/Ag core-shell NPs showed higher catalytic activity than the other monometallic NPs used in this study.

## Keywords
- Bimetallic strip
- Nanoparticle
- Transmission electron microscopy
- 4-Nitrophenol
- Materials science
- Catalysis
- Surface plasmon resonance
- Aqueous solution
- Absorption spectroscopy
- Shell (structure)
- Chemical engineering
- Nitrophenol
- Nanotechnology
- Nuclear chemistry
- Chemistry
- Metal
- Physical chemistry
- Composite material
- Metallurgy
- Organic chemistry
- Optics
- Engineering
- Physics

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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