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- Title
Green synthesis of gold nanoparticles using macroalgae Halimeda macroloba extract and their photocatalytic degradation of methylene blue and methyl orange.
- Authors
Lavanya, G.; Anandaraj, K.; Selvam, K.; Gopu, M.; Selvankumar, T.; Govarthanan, M.; Kumar, P.
- Abstract
Green synthesis of gold nanoparticles (AuNPs) is gaining attention of researchers because of their varieties of biomedical and environmental applications. This study reported the novel eco-friendly synthesis of AuNPs using green macroalgae Halimeda macroloba (HM) extract and evaluate their photocatalytic potential. The green synthesized H. macroloba mediated gold nanoparticles (HM-AuNPs) was characterized using UV-visible spectrophotometry, Fourier-transform infrared (FT-IR) spectroscopy, transmission electron microscope (TEM), scanning electron microscope-energy dispersive spectroscopy, x-ray photoelectron spectroscopy (XPS), and particle size distribution (PSD) anlaysis. The UV-visible spectrum shows a sharp intense plasmonic resonance peak at 543 nm. The bioactive compounds present in HM were primarily responsible for the biological reduction of gold ions validated by FT-IR analysis. XRD analysis proved the crystalline face centered cubic structure of the HM-AuNPs. The average particle size of 18.72 nm and morphological evidences were obtained from the images from TEM. The metallic form of biosynthesised HM-AuNPs was confirmed by XPS results with a distinctive binding energy. The photocatalytic degradation ability of the green synthesized HM-AuNPs was investigated against the methylene blue (MB) and methylene orange (MO) dyes under sunlight irradiation. The HM-AuNPs exhibited 97.23% and 89.91% photocatalytic activity against MB and MO after 90 min of exposure to sunlight, respectively. The overall results of this research indicate that H. macroloba mediated HM-AuNPs can be used as an effective option for the degradation of industrial dyes.
- Subjects
IRRADIATION; GOLD nanoparticles; FACE centered cubic structure; PHOTODEGRADATION; PARTICLE size distribution; X-ray photoelectron spectroscopy; DYES &; dyeing
- Publication
Polymers for Advanced Technologies, 2024, Vol 35, Issue 4, p1
- ISSN
1042-7147
- Publication type
Article
- DOI
10.1002/pat.6383