Photocatalytic decomposition of no on transition metal ion-exchanged zeolite catalysts

Masakazu Anpo, Masaya Matsuoka, Hiromi Yamashita, Woo Sung Ju, Sang Eon Park, Yong Gun Shul

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Transition metal ions (Cu+, Ag+) incorporated within the cavities of zeolites by an ion-exchange method show an efficient and unique photocatalytic performance for the decomposition of NO into N2 and O2 at 275 K. In situ ESR, UV-VIS, photoluminescence and XAFS (XANES and FT-EXAFS) investigations revealed that the transition metal ions exist in highly dispersed state with linear 2 coordination sphere within the pores of zeolites, the local structures of the metal ions being significantly affected by changing the kinds of zeolites. Detailed studies of the interaction of NO with the excited states of these metal ions clearly indicated that unique inner shell type excitation states of these metal ions play a significant role in the photocatalytic decomposition of NO, i.e., an electron transfer from the s orbital of the excited state of Cu+ or Ag+ ions into the π* antibonding orbital of NO initiates the decomposition reaction of NO.

Original languageEnglish
Pages (from-to)133-143
Number of pages11
JournalJournal of Industrial and Engineering Chemistry
Volume6
Issue number3
Publication statusPublished - 2000 Dec 1

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

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