Magnetically responsive antibacterial nanocrystalline jute cellulose nanocomposites with moderate catalytic activity

Evaluation of the multifunctional activity of silver bionanocomposites in environmental remediation and inhibition of the growth of multidrug-resistant pathogens

“…83 Significant bands that appeared in the region of 1076–1023 cm −1 and at 903 cm −1 corresponded to the –C–O–C– pyranose ring skeletal vibration and β-glycosidic linkages (the symmetric –C–O–C– stretching) between the monomers of cellulose respectively. 78 Successful removal of lignin and hemicellulose from the cellulose-rich plant residue was confirmed by the disappearance of the peaks at 1514 cm −1 and 1450 cm −1 (lignin-related absorbance) and at 1745 cm −1 (due to acetyl and uronic ester groups of hemicellulose) respectively. 84 The OH band of cellulose was less intensified in the nanocomposites than in the cellulose due to the participation of the OH functional group in the stabilization of Ag NPs to prevent agglomeration.…”

“…In the literature, the SPR band in the range of wavelength of 350–450 nm was found to confirm the formation of Ag NPs. For example, Hibiscus sabdariffa seed extract mediated cellulose supported Ag NPs showed the band at 417 nm, 8 Ag NPs embedded in TiO 2 and SiO 2 and CNC/CTAB/Ag nanohybrid composite had the SPR band at 410 nm, 56,77 NCJC/Fe 3 O 4 /Ag nanocomposites showed the single SPR band at 424 nm, 78 and jasmine flower extract mediated Ag NPs showed the SOR band at 440 nm. 48 The reported result is in agreement with the previous data and confirms the formation of well-dispersed AGC NCs of uniform shape and size.…”

“…Due to this reason, AGC NCs were destructed and formed a good dispersion of nanoparticles. 78 Destructed cellulose particles formed a well-dispersed cellulose matrix containing Ag NPs in it attached by strong electrostatic interactions between Ag + ions and electron-rich groups of cellulose. The strong interaction prevented the agglomeration and mobility of the NPs.…”

Cotton Textile/Iron Oxide Nanozyme Composites with Peroxidase-like Activity: Preparation, Characterization, and Application

“…Both the microwave-assisted modification procedure and ferrofluid treatment have been also successfully employed previously for magnetic modification of other types of textiles from both natural and synthetic fibers, in addition to various biological, inorganic, and organic particulate and high aspect ratio materials. , This indicates that, most probably, the mechanism of magnetic nanoparticles binding to diamagnetic materials is not based on the creation of new covalent bonds involving the functional groups of the modified material. It can, therefore, be concluded that physical adsorption is responsible for magnetic nanoparticles binding to the textile fibers; also hydrogen bonding between iron oxide nanoparticles and cellulose chains could be involved . In the specific case of nanoparticle-modified woven textile, the nanoparticles can also be deposited or trapped between the warp and weft yarns, within the yarns, or inside the nanoscale interstices of cellulose fibers, depending on their size and concentration.…”

Supported nanocatalysts: recent developments in microwave synthesis for application in heterogeneous catalysis

“…In the first step, the deposition or impregnation of metal precursor on solid support is achieved via impregnation / precipitation / coprecipitation / electrostatic / coordination depending on the support functional groups. 25,26 The second step is calcination / reduction / both by different techniques such as chemical reduction, 24,27 sonochemical 4 reduction, 28,29 laser ablation, 30,31 and thermal decomposition 32 . These methods mostly require higher temperature, longer reaction time and inert atmosphere.…”