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http://dx.doi.org/10.4191/KCERS.2007.44.6.325

Effect of pH on Pore Characteristics in Synthesis of High Porous AlO(OH) Gel by Hydrolysis of Al2(SO4)3 and Na2SO4 Mixed Solution  

Park, Byung-Ki (Energy Materials Research Center, Korea Research Institute of Chemical Technology)
Choe, Dong-Uk (Energy Materials Research Center, Korea Research Institute of Chemical Technology)
Lee, Jae-Rock (Energy Materials Research Center, Korea Research Institute of Chemical Technology)
Publication Information
Journal of the Korean Ceramic Society / v.44, no.6, 2007 , pp. 325-330 More about this Journal
Abstract
High porous AlO(OH) gel is used in precursor of ceramic material, coating material and porous catalyst. For use of these, not only physiochemical control for particle morphology, pore characteristic and peptization but also studies of synthetic method for preparation of high porous AlO(OH) gel were required. In this study, high porous AlO(OH) gel was prepared through the aging and filtration process of aluminum hydroxides gel precipitated by the hydrolysis reaction of $Na_2CO_3$ solution and $Al_2(SO_4)_3$ and $Na_2SO_4$ mixed solution. In this process, optimum synthetic condition of AlO(OH) gel having excellent pore volume as studying the effect of hydrolysis pH on gel precipitates has been studied. Hydrolysis pH brought about numerous changes on crystal morphology, surface area, pore volume and pore size. Physiochemical properties of gel were investigated as using XRD, TEM, TG/DTA, FT-IR and $N_2$ BET method.
Keywords
$Al_2(SO_4)_3$; Mineralizer; Porous material; Catalyst; Alumina ceramic;
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Times Cited By KSCI : 7  (Citation Analysis)
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