Preparation of silver nanoparticles with ionic liquid-modified carbon dots: from mechanism to the application in H 2 O 2
- PDF / 1,915,686 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 69 Downloads / 209 Views
Preparation of silver nanoparticles with ionic liquid-modified carbon dots: from mechanism to the application in H2O2 sensing Quanxing Mao1, Xiaolei Kong2, E Shuang2, Jianhua Wang2, and Xuwei Chen2,*
1 2
College of Chemistry, Liaoning University, Shenyang 110036, China Research Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China
Received: 20 April 2020
ABSTRACT
Accepted: 30 August 2020
There has been growing interest in preparing silver nanoparticles (AgNPs) under mild conditions in short time and using AgNPs to detect hydrogen peroxide. Here, we report the facile preparation of AgNPs by co-incubating AgNO3 and ionic liquid (IL) 1-carboxymethyl-3-methylimidazolium nitrate (HO2CMIMNO3) modified carbon dots (NO3-CDs) under mild circumstance in 10 s without extra reductant. Mechanism investigations indicate that the strong electronegativity and steric effect of the anionic moiety of IL endow the CDs high affinity toward Ag? and facilitates the fast fabrication of AgNPs. The resultant NO3-CD/AgNP hybrid exhibits absorbance fading behavior toward H2O2 and the decrease in absorbance at 415 nm provides accurate detection within 0.1–10 lmol L-1, along with a detection limit of 0.087 lmol L-1. The colorimetric method is successfully applied to H2O2 detection in urine and lake water sample with satisfactory recoveries. Moreover, the fluorescence ‘‘off–on’’ phenomena of NO3-CD/AgNP hybrid in the presence of H2O2, offers successful monitor on the fluctuation of H2O2 in human breast cancer (MCF-7) cells. This work provides a fast approach to CD/AgNP hybrid, and demonstrates its potential as sensing probe for H2O2 in lake water, urine, and living cells by making full use of the absorbance and fluorescence of the hybrid.
Ó
Springer Science+Business
Media, LLC, part of Springer Nature 2020
Handling Editor: Pedro Camargo. Quanxing Mao and Xiaolei Kong have contributed equally to this work.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10853-020-05200-6
J Mater Sci
GRAPHIC ABSTRACT Silver nanoparticles are prepared in 10 s with IL-CDs as reductant and are employed as colorimetric and fluorescent probe for H2O2 in real samples and living cells.
Ionic liquids modified carbon dots Ag+
H2O2
10 s Ag+ Ag+
MCF-7 cells HO
C
C N
+ CH3 N NO 3
Silver nanoparticles
O
Introduction Silver nanoparticles (AgNPs) have been gaining extensive interest due to its unique physical and chemical properties such as its surface-enhanced Raman scattering capacity, antibacterial characteristics, and catalytic activity [1]. The facile and fast fabrications of AgNPs are highly demanded as it is extensively applied in the fields of bio-sensing [2], therapeutic [3], antimicrobial [4] and materials [5, 6]. Various approaches including chemical reduction [7], electrochemical methods [8], radiation assistant method [9] and biological methods [10–12] have been developed for successful AgNPs preparation, while these methodologies usually take severa
Data Loading...
