Catalytic degradation of methylene blue by biosynthesised copper nanoflowers using F. benghalensis leaf extract

Abstract

This study reports the unprecedented, novel and eco-friendly method for the synthesis of three-dimensional (3D) copper nanostructure having flower like morphology using leaf extract of . The catalytic activity of copper nanoflowers (CuNFs) was investigated against methylene blue (MB) used as a modal dye pollutant. Scanning electron micrograph evidently designated 3D appearance of nanoflowers within a size range from 250 nm to 2.5 μm. Energy-dispersive X-ray spectra showed the presence of copper elements in the nanoflowers. Fourier-transform infrared spectra clearly demonstrated the presence of biomolecules which is responsible for the synthesis of CuNFs. The catalytic activity of the synthesised CuNFs was monitored by ultraviolet-visible spectroscopy. The MB was degraded by 72% in 85 min on addition of CuNFs and the rate constant () was found to be 0.77 × 10 s. This method adapted for synthesis of CuNFs offers a valuable contribution in the area of nanomaterial synthesis and in water research by suggesting a sustainable and an alternative route for removal of toxic solvents and waste materials.

Green synthesis of sulfur nanoparticles and evaluation of their catalytic detoxification of hexavalent chromium in water

“…F. bengalensis leaves were selected due to their proven activity as an efficient biomaterial for the synthesis of nanoparticles and ease of availability. 28 To the best of the authors' knowledge, this is the rst time that sulfur nanoparticles with a narrow size range from 2-15 nm were produced using plant extract. The catalytic activity of SNPs was studied in the presence of formic acid, as formic acid undergoes a catalytic transformation to liberate H 2 and CO 2 during the dehydrogenation process 29…”

Facile Synthesis of Triangular and Hexagonal Anionic Gold Nanoparticles and Evaluation of Their Cytotoxicity

“…Figure 3 illustrates the FTIR spectrum of AuNPs in the scanning range of 500-4000 nm. An intense peak was observed at 3419.70 cm −1 , which corresponded to the -OH stretching vibrations of the OH units and water [11,28]. A second intense peak was observed at 1604.73 cm −1 , which was ascribed to the local environments of the COO − groups (1610-1550 cm −1 ) in the protein molecule [29].…”

“…The effects of the temperature on the SPR and size of AuNPs were evaluated using UV-Vis spectroscopy and DLS, respectively. Agarwal et al indicated that temperature is an important parameter for nanoparticle synthesis [11]. We synthesized AuNPs at various temperatures in the range 85-200 • C using 2 mL E. annuus leaf extract.…”

“…Hence, researchers have focused on facile, cost-effective, nontoxic, environmentally friendly, green chemistry methods for synthesizing NPs. Nowadays, researchers have been adopting biological routes for the synthesis of nanomaterials using fungal [1,7,8] and bacterial [9] biomasses as well as plant extracts [10][11][12]. Of these biomaterials, plant extracts have gained the attention of researchers over bacterial and fungal biomasses.…”

Antibacterial Activity of Cu Nanoparticles against E. coli, Staphylococcus aureus and Pseudomonas aeruginosa

“…In one report, CuNPs was found to act as an efflux inhibitor in bacterial cells, the antibacterial effect of which was partly mediated by particle effect and partly by ion effect [26]. Some other studies suggested that Cu ions originating from the NPs may interact with phosphorus and sulfur-containing biomolecules, such as DNA and protein to distort their structures and thus disrupt biochemical processes [27][28][29][30]. Thus, from the results of earlier and our studies, we propose that CuNPs prepared here cause bacterial cell death due to multimodal action (Fig.…”