Highly ordered mesoporous Al-MCM-41 synthesis through valorization of natural sediment

D.E. BOLDRINI; S. ANGELETTI; P.M. CERVELLINI; D.M. REINOSO

ACS SUSTAINABLE CHEMISTRY & ENGINEERING

ACS PUBLICATIONS

Lugar: Washington, DC; Año: 2019 vol. 7 p. 4684 - 4691

2168-0485

In this work, natural sediment was used as an alternative and green inorganic source to synthetize valuable structured Al-MCM-41 material by hydrothermal process. This intertidal sediment contains a mixture of clay minerals (montmorillonite and illite) and minerals (quartz and feldspar) providing large SiO2 (~64%) and Al2O3 (~15%) content which were efficiently extracted by alkaline fusion. The synthetized mesoporous material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), diffuse reflectance infrared Fourier transform spectroscopy (FT-IR), N2 physisorption and 27Al solid state magic angle spinning nuclear magnetic resonance spectroscopy (27Al MAS-NMR). The results achieved reveal that pure and highly ordered hexagonal mesoporous aluminosilicate MCM-41 containing structural aluminum has been successfully synthetized. Moreover, it was evidenced that the obtained solid presents uniform pore size distribution (3.6 Å) as well as high pore volume (0.59 cm3g-1) and elevated specific surface area (807 m2g-1).