The method of MCM-41 synthesis was taken place at room temperature under atmospheric
condition, following the previous study [10]. Hexadecyltrimethylammonium bromide (CTAB) and
two sources of silica; silica extracted from rice husk ash, and commercial sodium silicate, were used as
reactants for MCM-41 synthesis; as named RHA_MCM-41 and SDS_MCM-41, respectively. The
process of synthesis, called sol-gel method, was carried out with the molar composition of 4SiO2:
1Na2O: 1CTAB: 200H2O. The mixture was adjusted the pH value to 10 and stirred constantly for 48 h
at room temperature. Afterward, the suspended solid was filtered and rinsed with ethanol solution. The
filtered solid was calcined at 550 °C for 5 h and kept in the desiccator before characterizations.
The method of MCM-41 synthesis was taken place at room temperature under atmosphericcondition, following the previous study [10]. Hexadecyltrimethylammonium bromide (CTAB) andtwo sources of silica; silica extracted from rice husk ash, and commercial sodium silicate, were used asreactants for MCM-41 synthesis; as named RHA_MCM-41 and SDS_MCM-41, respectively. Theprocess of synthesis, called sol-gel method, was carried out with the molar composition of 4SiO2:1Na2O: 1CTAB: 200H2O. The mixture was adjusted the pH value to 10 and stirred constantly for 48 hat room temperature. Afterward, the suspended solid was filtered and rinsed with ethanol solution. Thefiltered solid was calcined at 550 °C for 5 h and kept in the desiccator before characterizations.
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