Skip to main content
SpringerLink
Log in

In situ characterization of highly dispersed catalysts included within zeolite cavities and their photocatalytic reactivities

  • Published:
Il Nuovo Cimento D

Summary

A detailed characterization of catalysts prepared within zeolite cavities and their photocatalytic reactivities have been investigated usingin situ photo-luminescence, diffuse reflectance absorption, XAFS (XANES and FT-EXAFS) and ESR techniques. With the Ag+/ZSM-5 catalyst, it was found that Ag+ ions are highly dispersed in an isolated state within the zeolite cavities. UV irradiation of the Ag+/ZSM-5 catalyst in the presence of NO leads to the decomposition of NO into N2, O2 and N2O at 275 K. Dynamic studies show that the electron transfer from the excited state of the Ag+ ions (4d95s1) plays a significant role in initiating the decomposition of NO. Titanium oxide catalysts prepared within the Y-zeolite cavities via an ion-exchange method exhibit high and unique photocatalytic reactivities for the decomposition of NO into N2 and O2 as well as the reduction of CO2 with H2O showing a high selectivity for the formation of CH3OH. It was also found that the charge transfer excited state of the titanium oxide species, (T3+ -O-)*, plays a vital role in these unique photocatalytic reactions.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Anpo M., andYamashita H., inSurface Photochemistry, edited by M. Anpo (John Wiley & Sons, London) 1996.

    Google Scholar 

  2. Anpo M., Matsuoka M. andYamashita H.et al., J. Phys. Chem.,98 (1994) 5744.

    Article  Google Scholar 

  3. Matsuoka M., Yamashita H. andAnpo M.et al.,Chem. Lett. (1995) 375.

  4. Anpo M.,Solar Energy Materials and Solar Cells,38 (1995) 221.

    Article  Google Scholar 

  5. Yamashita H., Matsuoka M. andAnpo M.et al., J. Phys. Chem.,100 (1996) 397.

    Article  Google Scholar 

  6. Matsuoka M., Yamashita H. andAnpo M.,et al.,J. Mol. Catal.,107 (1996) 399.

    Article  Google Scholar 

  7. Yamashita H., Ichihashi Y. andAnpo M.et al., J. Phys. Chem.,100 (1996) 16041.

    Article  Google Scholar 

  8. Anpo M., Zhang S. G. andYamashita H.,11th Int. Congr. Catal.,101 (1996) 941.

    Google Scholar 

  9. Zhang S. G., Ichihashi Y., Yamashita H. andAnpo M.,et al.,Chem. Lett. (1996) 895.

  10. Yamashita H., Ichihashi Y. andAnpo M.,J. Phys. Chem.,101 (1997) 2632.

    Google Scholar 

  11. Anpo M., to be published inJpn. Catal. Surv.,1 (1997).

Download references

Author information

Authors and Affiliations

  1. Department of Applied Chemistry, Osaka Prefecture University — Sakai, Osaka 599, Japan

    M. Anpo

Authors
  1. M. Anpo
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to M. Anpo.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Anpo, M. In situ characterization of highly dispersed catalysts included within zeolite cavities and their photocatalytic reactivities. Nouv Cim D 19, 1641–1648 (1997). https://doi.org/10.1007/BF03185358

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF03185358

PACS 82.65.Jv

PACS 01.30.Cc

Search

Navigation