MCM-41 mesoporous molecular sieve materials with nanometer-sized pores show
the very strong photoluminescent (PL) effect and the Al-depleted defect si
tes are responsible for this strong PL effect of the investigated MCM-41 sa
mples. The porous channel structures of molecular sieves are another factor
influencing the investigated PL effect. (C) 1998 Elsevier Science Limited.
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