Abstract
MCM-41 mesoporous molecular sieve materials with nanometer-sized pores show a very strong photoluminescent (PL) effect when excited by the 441. 6 nm line of a He-Cd laser or by UV at 250 nm. Al-depleted defect sites are responsible for the strong PL-laser effect but not for the PL-UV effect. The 467 nm band in PL-UV spectra may be caused by oxygen-vacancy defect. Incorporation of aluminum enhances the PL effect. The porous channel structures of molecular sieves are another factor influencing the investigated PL effect.
| Original language | English |
|---|---|
| Pages (from-to) | 293-300 |
| Number of pages | 8 |
| Journal | Studies in Surface Science and Catalysis |
| Volume | 125 |
| State | Published - 1999 |
| Externally published | Yes |
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