A Novel Ag@AgCl Nanoparticle Synthesized by Arctic Marine Bacterium: Characterization, Activity and Mechanism

An additive- and pollution-free method for the preparation of biogenic silver and silver chloride nanoparticles (Ag@AgCl NPs) was developed from the bacteria Shewanella sp. Arc9-LZ, which was isolated from the deep sea of the Arctic Ocean. The optimal synthesizing conditions were explored, including...

Full description

Bibliographic Details
Published in:International Journal of Molecular Sciences
Main Authors: Shuang Li, Hui Zhang, Bailin Cong, Peiqing He, Wenqi Liu, Shenghao Liu
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2022
Subjects:
Ag@AgCl nanoparticles
synthesis mechanisms
Shewanella sp
dye reduction
antibacterial activity
Biology (General)
QH301-705.5
Chemistry
QD1-999
Arctic
Arctic Ocean
Online Access:https://doi.org/10.3390/ijms232415558
https://doaj.org/article/2cf41a32392b479db2d529478582f4ea
Description
Summary:An additive- and pollution-free method for the preparation of biogenic silver and silver chloride nanoparticles (Ag@AgCl NPs) was developed from the bacteria Shewanella sp. Arc9-LZ, which was isolated from the deep sea of the Arctic Ocean. The optimal synthesizing conditions were explored, including light, pH, Ag + concentration and time. The nanoparticles were studied by means of ultraviolet-visible (UV-Vis) spectrophotometry, energy dispersive spectrometry (EDS), X-ray diffraction (XRD) and inductively coupled plasma optical emission spectrometers (ICP-OES). The transmission electron microscope (TEM) showed that the nanoparticles were spherical and well dispersed, with particle sizes less than 20.00 nm. With Ag@AgCl nanoparticles, the kinetic rate constants for congo red (CR) and rhodamine B (RhB) dye degradation were 2.74 × 10 −1 min −1 and 7.78 × 10 −1 min −1 , respectively. The maximum decolourization efficiencies of CR and RhB were 93.36% and 99.52%, respectively. Ag@AgCl nanoparticles also showed high antibacterial activities against the Gram-positive and Gram-negative bacteria. The Fourier transform infrared spectroscopy (FTIR) spectrum indicated that the O-H, N-H and -COO- groups in the supernatant of Arc9-LZ might participate in the reduction, stabilization and capping of nanoparticles. We mapped the schematic diagram on possible mechanisms for synthesizing Ag@AgCl NPs.

Similar Items