Open AccessPhotosynthesis of Silver Nanoparticle – Carbon Quantum Dots Nanocomposites
Author(s) -
Mai Xuân Dũng,
Quang-Trung Le,
Lan-Anh Nguyen Thi,
Phương Nguyễn Thị,
Phuong Le Thi,
Viet-Hong La
Publication year - 2019
Publication title -
material science research india/material science research india
Language(s) - English
Resource type - Journals
eISSN - 2394-0565
pISSN - 0973-3469
DOI - 10.13005/msri/160205
Subject(s) - nanocomposite , raman spectroscopy , materials science , quantum dot , transmission electron microscopy , raman scattering , silver nanoparticle , nanoparticle , luminescence , ethylenediamine , carbon fibers , chemical engineering , photoluminescence , nanotechnology , absorption (acoustics) , photochemistry , inorganic chemistry , chemistry , composite number , optoelectronics , composite material , physics , engineering , optics
Nanocomposites (NCs) of silver nanoparticles (Ag NPs) and carbon quantum dots (CQDs) have been received increasing attention for diverse applications including sensing, photocatalyst, surface enhanced Raman scattering detection and antibacterial. Herein, we report a unique photosynthesis of Ag NPs-CQD using CQDs as photo-reducing agent. Highly luminescent CQDs were prepared by a hydrothermal method using a mixture of citric acid (CA) and ethylenediamine (EDA) as starting precursors. X-ray diffraction pattern (XRD), transmission electron microscope (TEM), infrared (IR) and Raman spectroscopies confirmed the formation of NCs. We have demonstrated that the formation of Ag NPs accompanied with the degradation of surface fluorophores, which responded for the resolved absorption peak at ca. 346 nm and high luminescence of pristine CQDs. The NCs showed excellent antibacterial affinity to Escherichia coli. The results provide new understandings on the interactions between CQDs and silver ions as well as potential applications of Ag NP – CQD nanocomposites.