Magnetic titanium dioxide nanocomposites for surface-enhanced resonance Raman spectroscopic determination and degradation of toxic anilines and phenols.
Mesoporous M-TiO2 NCs, functionalized by PATP, can capture toxic anilines and phenols by azo coupling. Loading these nanodevices with Ag NPs offers the possibility for a sensitive quantitative determination of target compounds by SERRS spectroscopy, which allows multiplex detection because of the specific vibrational fingerprints. Sensitivity and selectivity can be further enhanced by concentrating the hybrid particles by an external magnet and compound-specific binding (anilines versus phenols). The bound toxic compounds can be degraded by TiO2-assisted photocatalysis after removal of the loaded hybrid particles from the sample solution with an external magnet. The degradation process can be enhanced in the presence of plasmonic Ag nanostructures.
Institut für Chemie, Technische Universität Berlin, Sekr. PC14, Strasse des 17. Juni 135, 10623 Berlin (Germany).
Xiao Xia
XX
Han
Lei
L
Chen
Uwe
U
Kuhlmann
Claudia
C
Schulz
Inez M
IM
Weidinger
Peter
P
Hildebrandt
D000814:Aniline Compounds / Q000032:analysis*; D002384:Catalysis; D059346:Magnets / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D010636:Phenols / Q000032:analysis*; D010782:Photolysis; D012834:Silver / Q000737:chemistry; D013059:Spectrum Analysis, Raman / Q000379:methods; D014025:Titanium / Q000737:chemistry*
D000814:Aniline Compounds; D010636:Phenols; C009495:titanium dioxide; D012834:Silver; D014025:Titanium; C023650:aniline
SERRS; aniline; magnetic TiO2; phenol; photocatalysis