Improve the Optical Properties of Rhodamine B by Encapsulating in Al-MCM-41

Abstract

M-MCM-41 (M = Al, Cu, Cr, Ti) were synthesized by hydrothermal method and characterized by XRD. Rhodamine B molecules were encapsulated into these mesoporous molecular sieves by impregnation method. Steady fluorescence measurements indicated that doping of Al ions into MCM-41 enhanced largely the fluorescence intensities, but more Al decreased the fluorescence intensities resulting from the formation of Al2O3.

Synthesis and Characterization of Mesoporous Molecular Sieve Al-MCM-41 Using Kaolin as Raw Material

“…Solid porous materials are grouped into micro-porous, meso-porous and macro-porous materials. Pore size limitations of micro-porous materials prevents their extensive application [1].To overcome this, a new family of orderly arranged meso-porous silica materials such as MCM-41, MCM-48 and MCM-50 were successfully synthesized through the liquid crystal templating mechanism in 1992 by Mobil's researchers [2]. The novel meso-porous materials with ordered pore system, narrow pore size distribution, high special surface area and good thermal stability have attracted much great attention and widely applied in catalysis and adsorption [3,4].…”