Montmorillonite/carbon nanocomposites prepared from sucrose for catalytic applications

• Published in: Applied clay science Vol. 53; no. 2; pp. 288 - 296
• Main Authors: Anadão, Priscila, Hildebrando, Edemarino Araújo, Pajolli, Ivan Luiz Rocchetti, de Oliveira Pereira, Kleberson Ricardo, Wiebeck, Hélio, Valenzuela Díaz, Francisco Rolando
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-08-2011
• Subjects: Adsorption; Carbon; Catalysis; Catalysts; Intercalated morphology; Montmorillonite; Nanocomposite; Nanocomposites; Sucrose; Surface chemistry; Texture; Nanocomposite; Intercalated morphology; Catalysis; Montmorillonite; Carbon
• ISSN: 0169-1317; 1872-9053
• DOI: 10.1016/j.clay.2011.04.022

Sucrose was used to prepare montmorillonite/carbon nanocomposites by calcination in a reduced atmosphere. The aim was to investigate the changes derived from varying the clay and sucrose content in the resulting material and to change the adsorption properties to evaluate its potential to be used in catalytic applications. X-ray diffraction patterns revealed the formation of an intercalated nanostructure composed of carbon-filled clay mineral layers, which was confirmed by the Fourier transform infrared spectra and thermogravimetry curves. Differences in composition and texture surface were detected by scanning electron microscopy images and were supported by viscosity measurements. These measurements were helpful in understanding why the sample prepared with the highest sucrose content presented the lowest gasoline and methylene blue adsorption results and why the highest adsorption properties were attributed to the sample with the highest clay content. Moreover, BET and BJH studies allowed understanding oleic acid catalytic conversion. Finally, a water flux simulation test was performed to determine the mechanical resistance in comparison to an activated carbon. It was found that the nanocomposites were more resistant, supporting their use in catalytic applications for a longer period of time.
► The addition of sucrose in clay dispersions promoted the increase of viscosity. ► Carbon was intercalated into clay mineral layers. ► Nanocomposite with highest carbon content presented the lowest catalytic results. ► Montmorillonite/carbon nanocomposites were more resistant than activated carbon.