Authors: Muge Sari Yilmaz Sabriye Piskin
Publish Date: 2015/03/29
Volume: 121, Issue: 3, Pages: 1255-1262
Abstract
Mesoporous SBA15 was synthesized from tetraethyl orthosilicate and sodium silicate as pure silica sources and waste gold mine treatment sludge as an alternative silica source The synthesis of SBA15 samples were carried out by the hydrothermal method using the silica source and Pluronic P123 triblock copolymer as the structural template in an acidic medium The synthesized materials were characterized by Xray diffraction and nitrogen adsorption–desorption analysis Thermal decomposition behaviors and kinetics of template from assynthesized SBA15 samples derived from different silica sources were investigated by thermogravimetry The activation energies to decomposition of the template from assynthesized SBA15 samples were determined by Vyazovkin modelfree method The decomposition behavior of SBA15 synthesized from waste was similar to SBA15 synthesized from tetraethyl orthosilicate Thermogravimetry coupled with Fourier transform infrared spectrometry analysis was applied for analysis of gaseous products evolved during thermal decomposition of synthesized samples H2O CO2 CH2 and CH3 were the main gaseous products released
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