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- Title
PH sensitive structural uniformity of rice husk ash-derived MCM-41 silica.
- Authors
Teabpinyok, Nopporn; Chareonpanich, Metta; Samingprai, Sutheerawat; Limtrakul, Jumras
- Abstract
In this study, highly uniform MCM-41 mesoporous silica was synthesised from rice husk ash-derived sodium silicate using cetyltrimethyl ammonium chloride (CTAC) as a template. The chemical composition of the gel mixture was based on a SiO2:CTAC:H2O molar ratio of 1:0.5:75. When the pH value was initially controlled at ranges of 5.0-10.5 for 5 h and then immediately adjusted to 11.25 for the next 1 h, the structural uniformity of MCM-41 was abruptly increased by 3.3-7.5 times of the single pH value at 11.25, respectively. Moreover, thermal and hydrothermal stabilities at 900 and 250°C were clearly observed. © 2012 Canadian Society for Chemical Engineering
- Subjects
SILICA; SOLUBLE glass; SOL-gel processes; MIXTURES; HYDROGEN-ion concentration
- Publication
Canadian Journal of Chemical Engineering, 2012, Vol 90, Issue 4, p881
- ISSN
0008-4034
- Publication type
Article
- DOI
10.1002/cjce.21678