Accelerating MCM-41 One-Pot Synthesis Through Microwave Irradiation

Abstract

MCM-41 silica is widely utilized in various applications due to its unique textural and structural properties. Nonetheless, the presence of residual surfactant after synthesis poses a challenge to its effective application. This study explores the utilization of microwave irradiation as a promising approach for the one-pot synthesis and surfactant removal (cetyltrimethylammonium bromide - CTAB) of MCM-41, offering a fast and efficient methodology. The synthesis of MCM-41 was achieved within 0.5 to 1 hour, at a temperature of 60 ºC in a microwave reactor (Discovery SP, CEM). The study investigates the structural, chemical, morphological, and surface characteristics of MCM-41, analyzing the influence of synthesis time on these properties. To extract CTAB, ethanol was employed as a solvent at a temperature of 120 ºC for 6 minutes using a microwave reactor. The obtained particles, as well as the characterized textural and structural properties, validate the efficiency of the synthesis process, resulting in the production of MCM-41 within 36 minutes. Notably, this study presents the first instance of one-pot synthesis and surfactant removal from MCM-41 using a microwave reactor.