In situ characterization of the Ag+ ion-exchanged zeolites and their photocatalytic activity for the decomposition of N2O into N2 and O2 at 298 K

被引：38

作者：

Matsuoka, M ^{[1
]}

Ju, WS ^{[1
]}

Yamashita, H ^{[1
]}

Anpo, M ^{[1
]}

机构：

[1] Univ Osaka Prefecture, Grad Sch Engn, Dept Appl Chem, Sakai, Osaka 5998531, Japan

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2003年 / 160卷 / 1-2期

关键词：

photocatalysis; N2O decomposition; Ag+; zeolites;

D O I：

10.1016/S1010-6030(03)00219-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ag+ ion-exchanged zeolites (Ag+/ZSM-5, Ag+/Y) were prepared by an ion-exchange method. XAFS measurements showed that Ag+ ion exists in a two-coordinate sphere within the pore structure of ZSM-5, while aggregated Ag species (Ag-n(0) or Ag-m(n+) clusters) are formed within Y-zeolite. It was found that photocatalytic decomposition reaction of N2O into N-2 and O-2 at 298 K proceeds much efficiently on Ag+/ZSM-5 as compared to Ag+/Y. In situ UV-Vis, photoluminescence and Fr-IR investigations revealed that N2O adsorbs onto the isolated Ag+ ion to form Ag+-N2O adduct within ZSM-5, and the photoexcitation of thus formed Ag+-N2O adduct is the most important step of the photocatalytic decomposition reaction of N2O. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：43 / 46

页数：4

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