%K Calcination; Desorption; Diffraction; Diffusion in solids; Heat transfer; Honeycomb structures; Liquids; Molecular sieves; Nanostructured materials; Pore structure; Sieves; Silica; Structural properties, High thermal stability; MCM-41 mesoporous material; Mesoporous molecular sieves; Physicochemical; Physicochemical property; Siliceous mesoporous molecular sieves; Synthesis durations; Synthesized materials, Mesoporous materials
%X Pure silica mesoporous molecular sieve (MMS) solid has been synthesized at 100°C by hydrothermal process. The effect of synthesis duration from 2 to 10 days has been investigated on the physicochemical properties of mesoporous molecular sieve. Samples were characterized by low angle XRD, N2 adsorption-desorption and HRTEM analysis. XRD patterns of the as-synthesized samples showed four well-defined diffraction peaks corresponding to 100, 110, 200 and 210 planes. These peaks are the fingerprint characteristics of MCM-41 mesoporous material. The high intensity diffraction peaks were observed in 8-days sample that define the high ordering of the pores and long range order. N2 adsorption-desorption results showed that all samples possessed a type IV isotherm having hysteresis loop of type H1 which is an identification of mesoporous material. Calcined samples exhibited high surface area i.e., 984-1036 m2 g-1, pore volume i.e., 1.00-1.13 cm 3 g-1 and average pore diameter i.e., 3.04-3.30 nm. A hexagonal pore structure was found in the synthesized materials by HRTEM analysis, which confirms that the synthesized materials are MCM-41. HRTEM analysis showed the effect of synthesis duration on the materials and found that 8-days sample exhibited highly ordered hexagonal pore structure like honeycomb structure. All the samples were calcined at 550°C to remove the template and to study the changes in the mesoporous framework. The results showed that the mesoporous structure remained intact after calcination at 550°C, indicating that the mesoporous materials exhibit high thermal stability. © (2012) Trans Tech Publications.
%L scholars3192
%J Defect and Diffusion Forum
%O cited By 7; Conference of 7th International Conference on Diffusion in Solids and Liquids, Mass Transfer - Heat Transfer - Microstructure and Properties - Nanodiffusion and Nanostructured Materials, DSL 2011 ; Conference Date: 26 June 2011 Through 30 June 2011; Conference Code:89746
%R 10.4028/www.scientific.net/DDF.326-328.647
%D 2012
%A A. Ramli
%A S. Ahmed
%A S. Yusup
%I Trans Tech Publications Ltd
%V 326-32
%T Effect of synthesis duration on the physicochemical properties of siliceous mesoporous molecular sieve (Si-MMS)
%C Algarve
%P 647-653