Optimization of MCM-48 synthesis using factorial design

Abstract MCM-48 mesoporous materials were hydrothermally synthesized according to the 22 factorial design by varying the crystallization time and temperature of the synthesis gel, and characterized by means of X-ray diffraction analysis and adsorption of N2. In the crystallization temperature and ti...

Full description

Saved in:
Bibliographic Details
Published inCerâmica Vol. 62; no. 364; pp. 413 - 417
Main Authors Nascimento, A. R. do, Medeiros, R. L. B. de A., Melo, M. A. de F., Melo, D. M. de A., Souza, M. J. B. de
Format Magazine Article
LanguageEnglish
Published Associação Brasileira de Cerâmica 01.12.2016
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:Abstract MCM-48 mesoporous materials were hydrothermally synthesized according to the 22 factorial design by varying the crystallization time and temperature of the synthesis gel, and characterized by means of X-ray diffraction analysis and adsorption of N2. In the crystallization temperature and time conditions used, specific areas between 924 to 1102 m2.g-1, pore volumes between 0.015 to 0.087 cm3.g-1 and pore diameters between 3.2 to 4.0 nm were obtained. It was observed that for the syntheses performed at high temperature, the crystallization time should be reduced so that the material structure is formed. Resumo O material mesoporoso MCM-48 foi sintetizado hidrotermicamente de acordo com o planejamento fatorial 22, variando-se a temperatura e o tempo de cristalização do gel de síntese, e caracterizado através de análise por difração de raios X e adsorção de N2. Nas condições de temperatura e tempo de cristalização utilizadas, foram obtidas áreas específicas entre 924 a 1102 m2.g-1, volumes de poros entre 0,015 a 0,087 cm3.g-1 e diâmetros de poros entre 3,2 a 4,0 nm. Observou-se que, para as sínteses realizadas com temperatura elevada, deve-se reduzir o tempo de cristalização para que a estrutura do material seja formada.
ISSN:0366-6913
1678-4553
0366-6913
DOI:10.1590/0366-69132016623642028