NDLI: Zeolite-supported silver and silver–iron nanoclusters and their activities as photodecomposition catalysts

Content Provider	Springer Nature Link
Author	Gomez, Robert S. Li, Xiaobo Yson, Renante L. Patterson, Howard H.
Copyright Year	2011
Abstract	Catalysts containing nanoclusters of Ag(I) and Fe$_{2}$O$_{3}$ as dopants with sodalite and Y zeolite supports have been investigated in order to develop a more efficient catalyst for photodecomposition of the pesticide carbaryl and to gain insight about the reaction mechanism. Ag(I)–sodalite, Ag(I)/Fe$_{2}$O$_{3}$–sodalite, Ag(I)–Y zeolite, and Ag(I)/Fe$_{2}$O$_{3}$–Y zeolite were synthesized by ion-exchange techniques and characterized by powder X-ray diffraction (XRD), solid-state luminescence, UV–visible absorption, and atomic absorption spectroscopy measurements. The luminescence activity of the sodalite-supported and Y zeolite-supported catalysts was significantly different. Catalyst performance studies were conducted using carbaryl as the target compound and specific wavelengths of UV light as photon sources for the experiments. The studies showed that each catalyst’s performance was determined primarily by the specific wavelength of the UV light with which the system was irradiated. The studies also showed that inclusion of Fe$_{2}$O$_{3}$ as dopant enhanced the reactivity of the catalysts in several instances, with the Ag(I)/Fe$_{2}$O$_{3}$–sodalite catalyst and 298 nm irradiation being the most reactive of the systems studied. Additional reactions using each catalyst and 298 nm irradiation, and including either sodium bicarbonate as hydroxyl radical scavenger or D$_{2}$O as solvent, showed that hydroxyl radicals were likely intermediates in the catalyzed photodecomposition reaction.
Starting Page	729
Ending Page	745
Page Count	17
File Format	PDF
ISSN	09226168
Journal	Research on Chemical Intermediates
Volume Number	37
Issue Number	7
e-ISSN	15685675
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-05-29
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nanomaterials Decontamination Photocatalysis Zeolite Kinetics Inorganic Chemistry Catalysis Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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