NDLI: Photocatalytic Degradation of Diphenolic Acid in the Presence of Beta-Cyclodextrin under UV Light

Content Provider	IEEE Xplore Digital Library
Author	Li Guo Beibei Wang Wenyu Huang Feng Wu Jin Huang
Copyright Year	2009
Abstract	This paper investigated the photocatalysis degradation of diphenolic acid (DPA) in the presence of beta-cyclodextrin (β-CD) under a 30W UV lamp ( λmax=254nm ). In control experiment, the photodegradation rate of DPA is enhanced 33.5% after 30min irradiation. The interaction of DPA with β-CD yielded the formation of inclusion complexes at 1:1 stoichiometric ratio in solution, and β-CD can form steady host/guest inclusion complex with DPA. The photodegradation of 10–100μmol/L DPA irradiated UV lamp in aqueous solution was found to follow the pseudo-first-order law. Obviously, the photocatalytic degradation reaction rate constant of DPA in the system containing β-CD is higher than that without β-CD, and the first-order rate constant increased by 9.18-fold in the presence of β-CD. With the addition of β-cyclodextrin, the enhancement of photodegradation of DPA mainly results from moderate inclusion depth of DPA molecule in the β-CD cavity. This kind of inclusion structure allows DPA molecule sufficient proximity to secondary hydroxyl groups of the β-CD cavity, and these hydroxyl groups could be activated and converted to hydroxyl radicals under UV irradiation, which can enhance the photooxidation of DPA. This could be a promising method for Endocrine disrupting compounds in water remediation.
Starting Page	322
Ending Page	324
File Size	445278
Page Count	3
File Format	PDF
ISBN	9780769536828
DOI	10.1109/ESIAT.2009.189
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-04
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Endocrine system Humans Lamps cyclodextrin Environmental economics UV light Chemicals diphenolic acid Degradation Mineralization Resins Polymers photocatalysis Photochemistry
Content Type	Text
Resource Type	Article

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