Nanosized metal oxides in the mesopores of MCM-41 and MCM-48 silicates

Tertiary butylation of phenol over mesoporous MeMCM-48 and MeMCM-41 (Me = Ga, Fe, Al or B) solid acid catalysts

“…The pH of final gel was 11.4. This was then subjected to hydrothermal treatment at 383 K for 72 h. The solid as-synthesized product was washed repeatedly, filtered and dried at 353 K for 12 h, and calcined at 823 K for 2 h in N 2 followed by air for 6 h. For a comparison, gallium-free MCM-48 as well as Na-AlMCM-41, Na-FeMCM-41, Na-GaMCM-41, Na-AlMCM-48, Na-FeMCM-48, Na-BMCM-41 and Na-BMCM-48 were also prepared according to a procedure described elsewhere [16,[28][29][30][31][32][33][34].…”

Enhanced visible photoluminescent and structural properties of ZnO/KIT-6 nanoporous materials for white light emitting diode (w-LED) application

“…It is well established that semiconductors exhibit the unusual electrical and optical properties compared to bulk materials when the particle size decreases to nanometer scale [1][2][3][4][5][6][7][8][9][10].…”

“…A recent and growing interest has been devoted to assemblies made of semiconductors incorporated in mesoporous materials such systems are often called nanocomposites. A variety of synthesis techniques such as sol-gel [6], impregnation [7,8] and molecular M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 3 capping [9] have been used for the dispersion of ZnO particles in inorganic [10-12, 19, 22] matrices. However, the aggregation of ZnO particles is unavoidable.…”

Synthesis and characterization of TMA-A zeolite nanocrystals incorporating ZnO nanoclusters

“…Both chemical and physical methods have been employed to synthesize ZnO nanocrystals, but their aggregation remained very often unavoidable [10,11]. A simple way to solve this problem is incorporating nanocrystals into a porous matrix which can control the crystal growth [12,13].…”