Tunable deep-UV Raman spectroscopy reveals nitrate photolysis

A. Sterzi; U. Schneider; O. Sambalova; D. Bleiner; A. Borgschulte

doi:10.1117/12.2529383

9 September 2019 Tunable deep-UV Raman spectroscopy reveals nitrate photolysis

A. Sterzi, U. Schneider, O. Sambalova, D. Bleiner, A. Borgschulte

Proceedings Volume 11086, UV and Higher Energy Photonics: From Materials to Applications 2019; 1108605 (2019) https://doi.org/10.1117/12.2529383
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

Deep-UV Raman spectroscopy is a promising method for the analysis of nitrates and nitrites in water at ppm (mg/l) concentrations. In addition to the high sensitivity, the tunability of the laser source allows to deeper investigate the photoinduced reactions taking place under deep-UV illumination. Under these conditions, nitrate ions decompose into oxygen and nitrite through different reaction pathways. Analysis of the evolution of nitrate and nitrite Raman modes as a function of the excitation wavelength allows for estimating the photo-energy dependent quantum yield of the photolysis process. The results highlight the limits and capabilities of deep UV Raman as a on-line nitrate and nitrite monitoring method.

Conference Presentation

Citation Download Citation

A. Sterzi, U. Schneider, O. Sambalova, D. Bleiner, and A. Borgschulte "Tunable deep-UV Raman spectroscopy reveals nitrate photolysis", Proc. SPIE 11086, UV and Higher Energy Photonics: From Materials to Applications 2019, 1108605 (9 September 2019); https://doi.org/10.1117/12.2529383

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