Abstract
The green synthesis of inorganic nanoparticles (NPs) using bio-materials has attained enormous attention in recent years due to its simple, eco-friendly, low-cost and non-toxic nature. In this work, silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) were synthesized by the marine algae extract, Sargassum serratifolium (SS). The characteristic studies of bio-synthesized SS-AgNPs and SS-AuNPs were carried out by using ultraviolet–visible (UV–Vis) absorption spectroscopy, dynamic light scattering (DLS), high-resolution transmission electron microscope (HR-TEM), selected area electron diffraction (SAED), energy-dispersive X-ray spectroscopy (EDX), X-ray powder diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Phytochemicals in the algae extract, such as meroterpenoids, acted as a capping agent for the NPs’ growth. The synthesized Ag and Au NPs were found to have important catalytic activity for the degradation of organic dyes, including methylene blue, rhodamine B and methyl orange. The reduction of dyes by SS-AgNPs and -AuNPs followed the pseudo-first order kinetics.
Highlights
Water pollution caused by industrialization is one of the major problems of environmental pollution
This change of color appeared by localized surface plasmon resonance (LSPR)
Ag and Au NPs using Sargassum serratifolium (SS) extract were synthesized at 80 ◦ C via a facile and environmentally friendly synthetic method
Summary
Water pollution caused by industrialization is one of the major problems of environmental pollution. Dyes are widely used in various fields such as textiles, medical care, cosmetics, ink, plastics, and pharmaceuticals. In these industries, it is very important for the environment and people’s health to decompose and cleanly treat dyes with toxic, mutagenic and carcinogenic properties [? ]. Until now, a method of using nanoparticles as a catalyst for degrading dyes has been studied by many researchers. Metal nanoparticles (MNPs) have received attention in extensive modern research fields, including electronics, energy, catalysis, environment, sensors, optics, and medicine [? Many different MNPs, such as silver (AgNPs), gold (AuNPs), platinum (PtNPs), palladium (PdNPs) and iron nanoparticles, have been synthesized and investigated in various ways including photochemical synthesis [? AuNPs have been applied for drug delivery, biomarkers in diagnosis, sensors and energy generation, while
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