Visible-light-sensitive photocatalytic reaction on chromium-containing mesoporous silica: selective partial oxidation of propane with molecular oxygen

Autor:	Masakazu Anpo, Keiko Kida, Masao Ariyuki, Katsuhiro Yoshizawa, Satoshi Ohshiro, Hiromi Yamashita
Rok vydání:	2004
Předmět:	Chromium Ultraviolet visible spectroscopy Chemistry Inorganic chemistry Photocatalysis chemistry.chemical_element General Chemistry Partial oxidation Mesoporous silica Photochemistry Molecular sieve Visible spectrum Catalysis
Zdroj:	Research on Chemical Intermediates. 30:235-245
ISSN:	1568-5675 0922-6168
Popis:	The photocatalytic reactivities of chromium-containing mesoporous silica molecular sieves (Cr-HMS) under visible light irradiation have been investigated. Cr-HMS involves tetrahedral chromium oxide (Cr-oxide) moieties which are highly dispersed and incorporated in the framework of molecular sieve with two terminal Cr=O groups. In the presence of propane with molecular oxygen, a partial oxidation proceeded under visible light irradiation to produce acetone and acrolein, with high selectivity, while a complete oxidation proceeded under UV light irradiation mainly to produce CO 2 . The charge-transfer excited state of the tetrahedral Cr-oxide moieties plays a significant role in the photocatalytic reactions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cb37b9e343fb88dc27f5e8b1333bc60c https://doi.org/10.1163/156856704322960781 Zobrazit plný text záznamu Plný text ve formátu PDF