Facile phyto‐mediated synthesis of silver nanoparticles using Chinese winter jujube ( Ziziphus jujuba Mill. cv. Dongzao) extract and their antibacterial/catalytic properties

Abstract

The aqueous extract of Chinese winter jujube ( Mill. cv Dongzao) was used as reducing and capping agents for the synthesis of silver nanoparticles (AgNPs) for the first time. The resulting AgNPs were characterised by UV/Visible (UV-Vis) spectroscopy, atomic force microscope, transmission electron microscopy, selected area electron diffraction, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray and Fourier transform infrared spectroscopy (FTIR). The colloidal solution of AgNPs gave a maximum UV-Vis absorbance at 446 nm. The synthesised nanoparticles were almost in the spherical shapes with an average size of 11.5 ± 4. 8 nm. FTIR spectra were applied to identify the functional groups which were possibly responsible for the conversion of metal ions into nanoparticles. The results showed that the prepared AgNPs were coated with the biomolecules in the extract. The biosynthesised AgNPs showed a remarkable catalytic activity at room temperature, and they also showed good antibacterial properties against and.

Biosynthesis Microwave-Assisted of Zinc Oxide Nanoparticles with Ziziphus jujuba Leaves Extract: Characterization and Photocatalytic Application

“…Similarly, the bands at 3421 and 1384 cm −1 may be assigned to the stretching vibration of υ (O–H) and in-plane bending vibration of δ (O–H), respectively. Moreover, the band at 1052 cm −1 may be contributed by skeletal C–O and C–C vibration bands of glycosidic and pyrenoid ring [ 42 ]. Meanwhile, the FT-IR spectra of different ZnO NPs were analyzed to confirm the phase transformation and purity of the ZnO ( Figure 1 B–D).…”

“…For example, T ZnO NPs composed of irregular agglomerated particles, and the B ZnO NPs characterized with the irregular flake-shape composed of very small particles with an average particle size of 20 nm, whereas BMW ZnO NPs characterized with the well-defined spherical-like shape with an average particle size of 25 nm. The small size of the B ZnO NPs may be attributed to the presence of the Ziziphus jujuba leaves extract which act as capping agent and prevent the agglomeration of the ZnO NPs due to the existence of long chain natural products such as the polyphenols in the extract [ 41 , 42 , 45 , 46 , 47 , 48 ]. In addition, the well-defined spherical shape of the BMW ZnO NPs compared with the traditional and biosynthesized ZnO NPs may be ascribed to the thermally promoted crystallite growth due to the fusion of the small particles as a result of the high temperature, as well as the effect of the long chain natural products associated with the Ziziphus jujuba leaves extract.…”

Genome-wide characterization and expression analyses of the MYB superfamily genes during developmental stages in Chinese jujube

“…Many consumers favor jujube because of its good taste, rich nutrition, powerful health functions, and alternative medicinal properties (Wang et al, 2018b; Zhang et al, 2018a; Lam et al, 2016). Fresh jujube fruits develop rapidly particularly in the high-quality cultivar “Dongzao” (Yuan et al, 2017). The entire Chinese jujube genome sequence was obtained in 2014 (Liu et al, 2014), providing data for genome-wide analyses of the MYB superfamily.…”

Green synthesis of silver nanoparticles using Zingiber officinale and Thymus vulgaris extracts: characterisation, cell cytotoxicity, and its antifungal activity against Candida albicans in comparison to fluconazole

“…By developing nanotechnology, several nanostructures have been introduced as antifungal agents [9][10][11]. Among these nanomaterials, silver (Ag) nanoparticles (NPs) have been studied extensively more than others as antibacterial and antifungal agents [12][13][14][15][16][17]. Although there are a variety of chemical methods [18][19][20][21] in the preparation of Ag NPs, the 'green synthesis' has attracted a lot of interest due to avoiding hazardous waste, synthesising high purified product, economic benefits, and low-energy consumption [22].…”