Back to Search
Start Over
Electrochemical sensors based on molecularly imprinted polymers on Fe3O4/graphene modified by gold nanoparticles for highly selective and sensitive detection of trace ractopamine in water
- Source :
- The Analyst. 143:5094-5102
- Publication Year :
- 2018
- Publisher :
- Royal Society of Chemistry (RSC), 2018.
-
Abstract
- A novel molecular imprinting polymer (MIP)-based electrochemical senor, consisting of Fe3O4 nanobeads and gold nanoparticles on a reduced graphene oxide (RGO) substrate, was fabricated to detect ractopamine (RAC) in water using the reversible addition fragmentation chain transfer (RAFT) polymerization technique. The Au nanoparticles widely dispersed on RGO can significantly increase the response current for RAC detection in water, which is confirmed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and theoretical calculations. By means of the differential pulse voltammetry technique, the as-prepared MIP-based electrode shows a dynamic linear range of 0.002 to 0.1 μM with a correlation coefficient of 0.992 and a remarkably low detection limit of 0.02 nM (S/N = 3). Additionally, the sensor exhibits high binding affinity and selectivity towards RAC with excellent reproducibility. Our study demonstrates the potential for the proposed electrochemical sensors in monitoring organic pollutants in water.
- Subjects :
- Materials science
Graphene
010401 analytical chemistry
Molecularly imprinted polymer
Nanoparticle
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Biochemistry
0104 chemical sciences
Analytical Chemistry
law.invention
Dielectric spectroscopy
Chemical engineering
Colloidal gold
law
Electrochemistry
Environmental Chemistry
Differential pulse voltammetry
Cyclic voltammetry
0210 nano-technology
Molecular imprinting
Spectroscopy
Subjects
Details
- ISSN :
- 13645528 and 00032654
- Volume :
- 143
- Database :
- OpenAIRE
- Journal :
- The Analyst
- Accession number :
- edsair.doi...........0a045833ac34dc8dca34d219d48ecb70