Al-MCM-41 was incorporated, through a sol–gel based dipping approach, inside a glass–ceramic scaffold belonging to the SiO2–CaO–Na2O–Al2O3 (SCNA) system, to obtain an acidic system with bimodal porosity in the meso- and macro-range. First, SCNA was investigated by means of wideangle X-ray diffraction (XRD), differential thermal analysis (DTA) and hot stage microscopy (HSM) in order to select the optimal sintering condition to fabricate the macroporous foam-like carrier for Al-MCM-41. Then, Al-MCM-41 was incorporated into the SCNA scaffold; the pH value of Al-MCM-41 synthesis solution, used for the scaffold impregnation process, was shown to be a crucial parameter, on identical scaffold dipping time, to determine the distribution and the stability of the incorporated phase. The systems were characterized by means of XRD, N2 adsorption/desorption, TGA and SEM coupled with EDS. The Al-MCM-41-containing scaffold is active in the acid-catalyzed sucrose hydrolysis, chosen as model reaction, at variance with the scaffold as such.

Al-MCM-41 inside a glass-ceramic scaffold: a meso-macroporous system for acid catalysis / Ma, Hao; Baino, Francesco; Fiorilli, SONIA LUCIA; VITALE BROVARONE, Chiara; Onida, Barbara. - In: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. - ISSN 0955-2219. - 33:(2013), pp. 1535-1543. [10.1016/j.jeurceramsoc.2013.01.004]

Al-MCM-41 inside a glass-ceramic scaffold: a meso-macroporous system for acid catalysis

MA, HAO;BAINO, FRANCESCO;FIORILLI, SONIA LUCIA;VITALE BROVARONE, CHIARA;ONIDA, BARBARA
2013

Abstract

Al-MCM-41 was incorporated, through a sol–gel based dipping approach, inside a glass–ceramic scaffold belonging to the SiO2–CaO–Na2O–Al2O3 (SCNA) system, to obtain an acidic system with bimodal porosity in the meso- and macro-range. First, SCNA was investigated by means of wideangle X-ray diffraction (XRD), differential thermal analysis (DTA) and hot stage microscopy (HSM) in order to select the optimal sintering condition to fabricate the macroporous foam-like carrier for Al-MCM-41. Then, Al-MCM-41 was incorporated into the SCNA scaffold; the pH value of Al-MCM-41 synthesis solution, used for the scaffold impregnation process, was shown to be a crucial parameter, on identical scaffold dipping time, to determine the distribution and the stability of the incorporated phase. The systems were characterized by means of XRD, N2 adsorption/desorption, TGA and SEM coupled with EDS. The Al-MCM-41-containing scaffold is active in the acid-catalyzed sucrose hydrolysis, chosen as model reaction, at variance with the scaffold as such.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2505881
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