The nanosized luminescent Eu-MCM, which possesses regular uniform particles with a diameter of 15 nm, an enormous specific area of 734 m²/g, a large porosity of 1.49 cm³/g, and an ultra large pore of ?8 nm, was synthesized by means of sol-gel-assisted self-assembly at the interface of the non-aqueous phase and the aqueous phase. The nanosized supramolecular materials of TiO₂/Eu-MCM were prepared by the method of supramolecular encapsulation with TiO₂ as the guest encapsulated in the channels of the host Eu-MCM. The experiments of XRD, RAMAN, and selected area electron diffraction pattern showed the anatase of TiO₂ in the TiO₂/Eu-MCM. The TiO₂/Eu-MCM possessed the typical fluorescent spectra of Eu^3＋ion: The excited-states at ⁵L₁₀ (342 nm), ⁵L₉ (358 nm), ⁵L₇ (378 nm), ⁵L₆ (390 nm), ⁵D₃ (411 nm), ⁵D₂ (462 nm), and ⁵D₁ (524 nm); the emission peaks at 578, 590, 613, 654, and 703 nm, corresponding with the transitions ⁵D₀→⁷F_J (J＝0, 1, 2, 3, 4), respectively. The luminescent intensity of the TiO₂/Eu-MCM is much stronger than that of the Eu-MCM and the pure powder of TiO₂. The intensity of the 43%TiO₂/Eu-MCM is the strongest. The experimental results of fluorescence and UV-vis diffuse reflectance showed the effect of energy transfer of the guest TiO₂ to the host Eu-MCM. The photocatalytic oxidation of the phenol aqueous solutions with very weak UV light over the TiO₂/Eu-MCM was investigated. The specific photocatalytic reactivities of the TiO₂/Eu-MCM with 16%～53% TiO₂ were found to be much higher than that of the pure powder of TiO₂ and the Eu-MCM. The fluorescent intensity and the photocatalysis of the nanosized TiO₂/Eu-MCM have a certain extent relation. The nanosized 29%TiO₂/Eu-MCM with the specific area of 204 m²/g, the porosity of 0.24 cm³/g, and the aperture of 4.7 nm possesses the highest photocatalytic reactivity (68%) and the excellent selectivity of oxidation (85%).

Key words: mesoporous molecular sieve, nanosized material, composite, supramolecular encapsulation, luminescence, photocatalysis