Journal
CHEMICAL ENGINEERING JOURNAL
Volume 304, Issue -, Pages 141-148Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.06.050
Keywords
Hydroxylamine reduced silver colloid (HRSC); Phenanthrene; Naphthalene surface enhanced Raman scattering (SEAS)
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Funding
- King Abdulaziz City for Science and Technology (KACST) through the Science & Technology Unit at King Fahd University of Petroleum & Minerals (KFUPM) [11-ENV2143-04]
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Hydroxylamine reduced silver colloid was used as a surface enhanced Raman scattering (SERS) substrate for the detection of trace-level polyaromatic hydrocarbons (PAHs). The colloidal particles were predominantly spherical in shape and the size of the particles was around 50 nm with a wavelength of maximum absorption at 420 nm. The silver nanoparticles had impressive enhancement of the sensing signal using SERS. Raman signals of an aqueous solution of naphthalene and phenanthrene were obtained for concentrations of 10(-12) M and 10(-10) M respectively. The SERS intensity decreases linearly with concentration allowing quantitative analyses of the PAHs in ethanol and aqueous solutions; with good linear relation as indicated by the coefficient of determination R-2. (C) 2016 Elsevier B.V. All rights reserved.
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