Preparation of Thiol Modified Fe3O4@Ag Magnetic SERS Probe for PAHs Detection and Identification
Citations Over TimeTop 10% of 2011 papers
Abstract
In situ detection and identification of PAHs, a group of well-known persistent organic pollutants, presents a great challenge to environmental researchers. This work developed a novel substrate based on thiol-functionalized Fe3O4@Ag core–shell magnetic nanoparticles for surface enhanced Raman scattering (SERS) sensing of PAHs. The surface morphology, structure, and magnetic properties of the substrate were characterized using multiple complementary techniques including transmission electron microscopy, energy-dispersive X-ray spectroscopy, vibrating sample magnetometry analysis, and extended X-ray absorption fine structure spectroscopy. The high saturation magnetization at 48.35 emu g–1 enabled the complete and rapid separation of the substrate from the PAH solution. Benzene, naphthalene, anthracene, phenanthrene, fluorene, pyrene, perylene, and BaP were chosen as probe molecules. Qualitative and quantitative determination of PAHs was achieved using a portable Raman spectrometer. The SERS sensitivity was positively correlated with the hydrophobic nature of PAHs. The SERS response exhibited a linear dependence on the PAHs concentration between 1 to 50 mg/L, and the detection limit in the order 10–5 to 10–7 M was obtained. The SERS platform with magnetic substrate provides a new way for in situ PAH monitoring.
Related Papers
- → Degradation of phenanthrene, fluorene and fluoranthene by pure bacterial cultures(1990)238 cited
- → Influence of phenanthrene and fluoranthene on the degradation of fluorene and glucose by Sphingomonas sp. strain LB126 in chemostat cultures(2003)49 cited
- → Phenanthrene stimulates the degradation of pyrene and fluoranthene by Burkholderia sp. VUN10013(2007)37 cited
- → Determination of polynuclear aromatic hydrocarbons in vapor phases by laser-induced molecular fluorescence(1983)21 cited