کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1249618 | 1495999 | 2012 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Raman spectroscopy of lithium hydride corrosion: Selection of appropriate excitation wavelength to minimize fluorescence Raman spectroscopy of lithium hydride corrosion: Selection of appropriate excitation wavelength to minimize fluorescence](/preview/png/1249618.png)
Lithium hydride is pyrophoric and will efficiently react with moisture forming lithium hydroxide on the surface. Typically, this surface corrosion reaction is examined by diffuse reflectance infrared Fourier-transform (DRIFT) spectroscopy. In the current study, Raman spectroscopy has been used to evaluate the same reaction with a focus on the role of Li2O in particular. A number of visible and near infrared excitation lasers were investigated in order to achieve the highest sensitivity; however, fluorescence dominates the spectrum. Photo bleaching experiments resulted in fluorescence reduction after illumination. Photoluminescence spectra indicate that the UV excitation could provide a luminescence-free region to collect high quality Raman spectra for LiH. A custom Raman probe was used to study the hydrolysis reaction of LiH with a 325 nm laser. Further, the role of lithium oxide in the hydrolysis kinetics has been studied.
Journal: Vibrational Spectroscopy - Volume 60, May 2012, Pages 133–136