Enhanced Photocatalytic Degradation of Dimethyl Methylphosphonate in the Presence of Low-Frequency Ultrasound Научная публикация
Журнал |
Photochemical & Photobiological Sciences
ISSN: 1474-905X , E-ISSN: 1474-9092 |
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Вых. Данные | Год: 2003, Том: 2, Номер: 6, Страницы: 694-698 Страниц : 5 DOI: 10.1039/b300444a | ||||
Ключевые слова | Carbon; Catalysis; Chemical Warfare Agents; Kinetics; Models, Chemical; Organophosphorus Compounds; Oxidation-Reduction; Photochemistry; Titanium; Ultrasonics; Ultraviolet Rays | ||||
Авторы |
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Организации |
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Информация о финансировании (3)
1 | North Atlantic Treaty Organization | SfP-974209 |
2 | National Science Foundation | CTS-9619392 |
3 | United States Department of the Army | DAAD 19-00-1-0399 |
Реферат:
Mechanistic aspects of the role of 20 kHz ultrasonication in photocatalytic oxidation of dimethyl methylphosphonate (DMMP), a simulant for nerve chemical warfare agents, were studied in a batch reactor. We found that DMMP did not undergo mineralization under low frequency (20 kHz) ultrasonic irradiation. The increase of the rate of DMMP photocatalytic mineralization in the presence of ultrasound was not due to deagglomeration of TiO2, but was associated with enhanced mass transport of reagents. The same intermediate non-volatile products were detected in photocatalytic and sonophotocatalytic degradation. A kinetic model involving all stable intermediate species detected was introduced. Apparent rate constants of all stages of DMMP mineralization increase under sonication. A reaction route of DMMP mineralization without the formation of intermediate products appeared under ultrasonication. Such behaviour was attributed to enabling mass transport of DMMP into micropores and to the surface of TiO2.
Библиографическая ссылка:
Chen Y-C.
, Vorontsov A.V.
, Smirniotis P.G.
Enhanced Photocatalytic Degradation of Dimethyl Methylphosphonate in the Presence of Low-Frequency Ultrasound
Photochemical & Photobiological Sciences. 2003. V.2. N6. P.694-698. DOI: 10.1039/b300444a WOS Scopus РИНЦ
Enhanced Photocatalytic Degradation of Dimethyl Methylphosphonate in the Presence of Low-Frequency Ultrasound
Photochemical & Photobiological Sciences. 2003. V.2. N6. P.694-698. DOI: 10.1039/b300444a WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 13 янв. 2003 г. |
Принята к публикации: | 5 мар. 2003 г. |
Опубликована online: | 7 апр. 2003 г. |
Опубликована в печати: | 1 июн. 2003 г. |
Идентификаторы БД:
Web of science | WOS:000183432200011 |
Scopus | 2-s2.0-0141544927 |
РИНЦ | 13437197 |
Chemical Abstracts | 2003:441955 |
Chemical Abstracts (print) | 139:234405 |
OpenAlex | W2107763534 |