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논문 기본 정보

자료유형
학술저널
저자정보
Vicente, Jose Salas (Lehrstuhl fur Umweltmesstechnik, Engler-Bunte-Institut, Universitat Karlsruhe) Gejo, Juan Lopez (Lehrstuhl fur Umweltmesstechnik, Engler-Bunte-Institut, Universitat Karlsruhe) Rothenbacher, Sonja (Bereich Gas-Partikel-Systeme, Institut fur Mechanische Verfahrenstechnik und Mechanik, Universitat Karlsruhe) Sarojiniamma, Sumalekshmy (Lehrstuhl fur Umweltmesstechnik, Engler-Bunte-Institut, Universitat Karlsruhe) Gogritchiani, Eliso (Lehrstuhl fur Umweltmesstechnik, Engler-Bunte-Institut, Universitat Karlsruhe) Worner, Michael (Lehrstuhl fur Umweltmesstechnik, Engler-Bunte-Institut, Universitat Karlsruhe) Kasper, Gerhard (Bereich Gas-Partikel-Systeme, Institut fur Mechanische Verfahrenstechnik und Mechanik, Universitat Karlsruhe) Braun, Andre M. (Lehrstuhl fur Umweltmesstechnik, Engler-Bunte-Institut, Universitat Karlsruhe)
저널정보
한국광과학회 Photochemical & photobiological sciences : an international journal Photochemical & photobiological sciences : an international journal 제8권 제7호
발행연도
2009.1
수록면
944 - 952 (9page)

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Aerosols of submicron polystyrene particles were oxidized by either vacuum-ultraviolet (VUV) irradiation in the presence of molecular oxygen ($O_2$) and/or by ozone ($O_3$). Different degrees of oxidation and oxidative degradation were reached by VUV-photolysis depending on radiant energy, $O_2$ and $H_2O$ concentrations in the bulk gas mixture as well as on particle diameter. The same functionalization was obtained by exposing the aerosol to $O_3$, however, oxidation, in particular oxidative degradation, was less efficient. The evolution of hydroxyl and carbonyl functions introduced was quantified by ATR-FTIR spectroscopy of filtered particles, and oxidative degradation of the polymer particles was confirmed by determining size and number of aerosol particles before and after oxidation. Efficiency analyses are based on the results of an $O_3$ actinometry and on an evaluation of the rate of absorbed photons by the aerosol particles in function of their size.

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