Quantitative surface‐enhanced resonance Raman scattering analysis of methylene blue using silver colloid

Quantitative analysis of methylene blue (MB) has been performed with Surface Enhanced Raman Scattering, SERS, using citrate reduced silver colloid activated with NaCl. In this study, the combination of SERS occurring at the proximity of the plasmon surface and of resonance Raman with excitation wave...

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Bibliographic Details
Published inJournal of Raman spectroscopy Vol. 48; no. 12; pp. 1762 - 1770
Main Authors Anastasopoulos, J.A., Soto Beobide, A., Manikas, A.C., Voyiatzis, G.A.
Format Journal Article
LanguageEnglish
Published Bognor Regis Wiley Subscription Services, Inc 01.12.2017
Subjects
Citric acid
Contaminants
Dyes
Environmental degradation
Extreme values
low concentration
Membranes
Methylene blue
Molecular weight
Pollutants
Purification
Quantitative analysis
Raman spectra
Resonance
Resonance scattering
right‐angle scattering geometry
Silver
Sodium chloride
surface‐enhanced resonance Raman scattering (SERRS)
Wastewater
Water purification
Water treatment
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Summary:Quantitative analysis of methylene blue (MB) has been performed with Surface Enhanced Raman Scattering, SERS, using citrate reduced silver colloid activated with NaCl. In this study, the combination of SERS occurring at the proximity of the plasmon surface and of resonance Raman with excitation wavelength matched to the maximum absorbance of the molecule being analyzed, was successfully applied to maximize the Raman scattering intensity. The surface‐enhanced resonance Raman scattering (SERRS) spectra of aqueous solutions of the dye at various concentrations were collected in right‐angle scattering geometry configuration which results favorable when nanocolloidal dispersions are used. The MB concentration was correlated with the intensity of the peak centered at 1,625 cm−1 in the SERRS spectrum and this correlation resulted in an extremely sensitive quantitative investigation of the MB with limit of detection in pM level. Among others, this method can be easily applied for the examination of both the selectivity of waste water purification membranes for relevant small molecular weight contaminants or/and the solar photocatalytic effectiveness of such membranes for the degradation of pertinent pollutants by their quantitative assessment in the permeate at very low concentration range. The use of surface‐enhanced resonance Raman scattering (SERRS) at the assessment of methylene blue at picomolar concentration level using silver colloid
ISSN:0377-0486
1097-4555
DOI:10.1002/jrs.5233