Synthesis of MCM‐41 material from acid mud generated in the aluminum extraction of kaolinite mineral

Abstract

The use of acid mud produced during the aluminum extraction of kaolinite to synthesize mobil composition of matter no. 41 (MCM‐41) type material is proposed in this work. The acid mud was placed in contact with NaOH at 550°C to release the silicon and aluminum, then the fused material obtained was mixed with cetyltrimethylammonium bromide (CTAB) followed by a hydrothermal treatment considering a factorial design 2k with four experimental factors (CTAB dose, synthesis time, temperature, and solid/liquid ratio). The formation of MCM‐41 was evaluated via X‐ray diffraction (XRD) and scanning electron microscopy coupled with electrons dispersive spectroscopy (SEM‐EDS) analysis complemented with surface area analysis from which a maximum value of 550 m2/g was obtained for the best material. XRD results showed the typical pattern of MCM‐41 measured at low angle, furthermore, the characteristic type IV isotherm of adsorption–desorption was observed in certain materials. The elemental analysis showed the presence of iron and titanium oxide, which could be of great interest for the use of the material as a photocatalyst. Preliminary tests, using the MCM‐41 samples synthesized and methyl orange revealed a moderate photocatalytic activity of the material as compared to a commercial product (P25); opening up opportunities for the further development of such materials as potential and cost‐effective photocatalysts for pollutants degradation in wastewater. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13069, 2019

SBA-15 synthesis from sodium silicate prepared with sand and sodium hydroxide

“…When the sodium silicate synthesized from sand is used to form the SBA-15, particles of heterogeneous morphology are appreciated; moreover, some typical structures of SBA-15 material are formed. In this last case, the interparticle porosity contributed to mesoporosity [29]. Particles of size<500 nm are observed generating the surface area in the total material.…”

El potencial de las nanopartículas de Ag y Cu para la fabricación de recubrimientos fotocatalíticos para mitigar la propagación de la COVID-19

“…En este caso, se utiliza el método de intercambio iónico para modificar las zeolitas con iones Cu +2 , Ag + , entre otros con propiedades antimicrobianas. Los ensayos de fotocatálisis heterogénea para inactivar bacterias y virus normalmente emplean zeolitas comerciales, aunque otras zeolitas sintetizadas con precursores no convencionales también se han propuesto como una alternativa para disminuir posibles impactos ambientales asociados con el uso de Zamora, 2015;Sánchez-Ruíz et al, 2018;Coutino-González et al, 2018;Lázaro et al, 2020). Asimismo, se ha propuesto el uso de zeolitas naturales como materiales antimicrobianos.…”

Manufacture Porous Materials by Dabco-Based Lonic Liquid

“…There has been much research in recent years into the synthesis methods of MCM-41, [8][9][10][11] but only a few studies concerning the synthesis methods of KIT-1. One of these studies was conducted in 1996 by Ryoo et al, and it successfully synthesized KIT-I, for the rst time, by an electrostatic templating route by means of ethylenediaminetetraacetic acid tetrasodium salt (EDTANa 4 ), HTAC1, and sodium silicate [2].…”