Characterization of Calcium-doped Silica Gel Prepared in an Aqueous Solution
作者： Dang Viet QUANG , Jin-Koo PARK , Jong-Kil KIM , Gideon ELINEEMA , Godlisten N. SHAO
DOI: 10.4144/RPSJ.59.33
关键词: BET theory 、 Calcium 、 Doping 、 Chemistry 、 Pore size 、 Inorganic chemistry 、 Silica gel 、 Sodium silicate 、 Aqueous solution 、 Calcium silicate hydrate
摘要: In this study, calcium-doped silica was prepared by modifying sodium silicate-based gel in an aqueous solution of Ca(OH)2. Silica gels with less than 1 mm size different pH values were treated Ca(OH)2 at concentrations ranging from 2 to 20 g/L and aged 25, 60, 90°C for 40 min. The BET surface area the decreased while its pore increased considerably after modification solution. 5% water ranged about 8.5 10, depending on gel, aging temperature, concentration When 20%, needle-like crystals calcium silicate hydrate formed over gel.
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