Proficient dye removal from water using biogenic silver nanoparticles prepared through solid-state synthetic route

Abstract

An environmentally benign, one-pot and highly scalable method was presented to produce biogenic silver nanoparticles (Ag NPs) using the solid-state synthetic route. Four plant-derived candidate bio-reductants ( i.e. , Datura stramonium, Papaver orientale, Mentha piperita, and Cannabis sativa ) were investigated to compare the efficiency of solid-state route and typical solution method. M. piperita was selected as the best plant resource to produce totally pure and uniform Ag NPs (average diameter of 15 nm) without any aggregation. The purity and size of biogenic Ag NPs, were tailored by adjusting the M. piperita leaf powder/silver nitrate weight ratio and temperature. The as-synthesized Ag NPs were effectively utilized as an eco-friendly nanoadsorbent in water remediation to remove a model dye (i.e., crystal violet). The key factors affecting on the sorption process (i.e., nanoadsorbent dosage, temperature, pH, dye initial concentration, and shaking time) were investigated. The pseudo-second-order kinetic model was well fitted to the sorption process and at the optimum sorption conditions, based on the Langmuir model, the adsorption capacity was found to be 704.7 mg/g. The current, cost effective and feasible method could be considered as an applicable strategy to produce green, reusable and proficient Ag NPs as nanoadsorbents for removal of dyes from contaminated water.

Concentration and Surface Chemistry Dependent Analyte Orientation on Nanoparticle Surfaces

“…The analytes selected are crystal violet (CV), 4-aminothiophenol (4-ATP), and thiophenol (TP). TP , and 4-ATP , are known to chemisorb to nanoparticle surfaces, while CV physisorbs. , The variations in nanostar surface chemistry and the differences in analyte–nanostar interaction enable the determination of how each factor impacts analyte orientation on the nanoparticle surface. UV–vis spectroscopy, transmission electron microscopy, ζ potential, X-ray photoelectron spectroscopy, and molecular dynamics simulations were conducted to further characterize the systems and explain the observed interaction behavior.…”

Potential of a deep eutectic solvent in silver nanoparticle fabrication for antibiotic residue detection

“…Moreover, the XRD pattern of the thin film ( Figure 2B ) shows four characteristic peaks at 38.2°, 44.3°, 64.4°, and 77.6°, corresponding to the (111), (200), (220), and (311) planes of face-centered cubic (fcc) Ag, respectively. The crystallite size is 30.61 nm, calculated from the most characteristic (111) peak of the Ag NPs [ 40 ]. From the presence of the fcc Ag lattice planes, we claim that Ag NPs-DES have been successfully synthesized [ 41 ].…”

Bioinspired Multifunctional Silver Nanoparticles for Optical Sensing Applications: A Sustainable Approach

“…Furthermore, Ag NPs produced by Durio zibethinus leaf extract were utilized for exclusive detection of Hg 2+ at the microlevel amid other heavy metal ions, divalent and trivalent ions . In addition, it is used to remove toxic dyes from wastewater, too. , Interestingly, silver nanoparticles synthesized from green tea leaves, Camellia sinensis picked from different elevation point in the regions of Nepal (Figure b), were found to be an excellent sensor to detect mercury ions . The optical and structural properties of silver nanoparticles synthesized from hyacinth plant leaves show excellent coulometric sensing response to heavy metal ions like Hg 2+ .…”