Abstract
In this study, (SBA-15)–Eu 2O 3 host-guest composites have been prepared with SBA-15 mesoporous sieve as host and Eu 2O 3 as guest via the solid-phase ultrasonic method and liquid-phase medium ultrasonic method. The host–guest composite materials showed the properties of luminescence. Four excitation peaks appeared in the excitation spectra of the samples. The excitation peaks are located at 397, 415, 466, 537 nm; 392, 408, 464, 532 nm and 393, 406, 465, 533 nm for the nano-Eu 2O 3, the liquid-phase medium ultrasonic method (LPMUM) and the solid-phase ultrasonic method (SPUM) samples, respectively. SBA-15 has the well-ordered hexagonal arrays of mesopores, which makes centrosymmetry of Eu 3+ higher in the prepared (SBA-15)–Eu 2O 3 samples. The intensity of 5D 0→ 7F 1 transition strengthens, and the intensity of 5D 0→ 7F 2 transition weakens.
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