NDLI: Comparison of Different Photocatalytic Systems for Acetonitrile Degradation in Gas

Content Provider	Springer Nature Link
Author	Augugliaro, Vincenzo Coluccia, Salvatore García López, Elisa Loddo, Vittorio Marcì, Giuseppe Martra, Gianmario Palmisa, Leonardo Schiavello, Mario
Copyright Year	2005
Abstract	Photocatalytic degradation of acetonitrile was carried out in gas–solid regime by using two commercial TiO$_{2}$ samples (Merck and Degussa P25) irradiated in two continuous annular photoreactors. The inlet gas flow consisted of oxygen, nitrogen, acetonitrile and water vapours. The influence on the photodegradation rate of gas flow rate, acetonitrile, oxygen and water concentrations and photon flux was investigated. The degradation products of acetonitrile were carbon dioxide and hydrogen cyanide. The photocatalysts performance was not affected by the presence or absence of water vapour in the reacting mixture. The Langmuir–Hinshelwood model describes adequately the photoreactivity results and provides the values of kinetic and equilibrium adsorption constants. FT-IR spectroscopy was used to investigate the adsorption patterns and photo-oxidation intermediates of acetonitrile on fully hydrated surface of TiO$_{2}$ powders. Acetonitrile was adsorbed on Ti$^{4+}$ surface ions and hydroxyl groups for both types of TiO$_{2}$. In the absence of UV light this interaction was completely reversible for Merck catalyst whereas for Degussa P25 part of adsorbed acetonitrile molecules reacted to form acetamide-like species.
Starting Page	237
Ending Page	244
Page Count	8
File Format	PDF
ISSN	10225528
Journal	Topics in Catalysis
Volume Number	35
Issue Number	3-4
e-ISSN	15729028
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2005-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	acetonitrile degradation heterogeneous photocatalysis TiO$_{2}$ FTIR investigation Pharmacy Physical Chemistry Industrial Chemistry/Chemical Engineering Catalysis Characterization and Evaluation Materials
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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