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PH sensitive structural uniformity of rice husk ash‐derived MCM‐41 silica
Author(s) -
Teabpinyok Nopporn,
Chareonpanich Metta,
Samingprai Sutheerawat,
Limtrakul Jumras
Publication year - 2012
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.21678
Subject(s) - husk , sodium silicate , molar ratio , hydrothermal circulation , ammonium chloride , nuclear chemistry , ammonium , mesoporous silica , sodium , chemistry , materials science , mesoporous material , chemical engineering , composite material , organic chemistry , catalysis , botany , engineering , biology
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 SiO 2 :CTAC:H 2 O 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