TY - JOUR
T1 - Fabrication of a sol-gel derived microporous zirconia membrane for nanofiltration
AU - Qi, Hong
AU - Zhu, Guizhi
AU - Li, Li
AU - Xu, Nanping
PY - 2012/5
Y1 - 2012/5
N2 - This paper reports the fabrication and nanofiltration properties of a sol-gel derived microporous zirconia membrane. Effects of synthesis parameters, including hydrolysis time, hydrolysis temperature, hydrolysis ratio and chelating agent dopant, on the state and size of polymeric zirconia sol, were investigated. Highly reproducible and stable zirconia sol after refluxing at 40 °C for 180 min, with an average particle size of approximately 8.6 nm, was synthesized with a recipe of [Zirconium n-propoxide]: [Diethanolamine]: [1-propanol]: [H 2O] being 1: 2.2: 28.7: 9.4 (in molar ratio). The sol was subsequently used for the fabrication of microporous ZrO 2 membranes onto alumina supported mesoporous γ-Al 2O 3 layers. ZrO 2 membranes with molecular weight cut-off (MWCO) of 354, 1,195, corresponding to the pore size of 0.94 and 1.75 nm, were successfully fabricated. Ionic retention properties of such ZrO 2 membranes with respect to electrolyte solutions, like MgCl 2, CaCl 2, NaCl and Na 2SO 4, were also determined. Effects of parameters such as concentration of salt solutions and trans-membrane pressure on retention rates of microporous ZrO 2 membranes were studied in detail. Results showed that zirconium n-propoxide derived microporous ZrO 2 membranes exhibited comparatively high retention rates towards divalent ions like Mg 2+ and Ca 2+, while much lower retention rates were observed for mono-valent ion (Na +) in the present study, which are the characteristics of nanofiltration membranes.
AB - This paper reports the fabrication and nanofiltration properties of a sol-gel derived microporous zirconia membrane. Effects of synthesis parameters, including hydrolysis time, hydrolysis temperature, hydrolysis ratio and chelating agent dopant, on the state and size of polymeric zirconia sol, were investigated. Highly reproducible and stable zirconia sol after refluxing at 40 °C for 180 min, with an average particle size of approximately 8.6 nm, was synthesized with a recipe of [Zirconium n-propoxide]: [Diethanolamine]: [1-propanol]: [H 2O] being 1: 2.2: 28.7: 9.4 (in molar ratio). The sol was subsequently used for the fabrication of microporous ZrO 2 membranes onto alumina supported mesoporous γ-Al 2O 3 layers. ZrO 2 membranes with molecular weight cut-off (MWCO) of 354, 1,195, corresponding to the pore size of 0.94 and 1.75 nm, were successfully fabricated. Ionic retention properties of such ZrO 2 membranes with respect to electrolyte solutions, like MgCl 2, CaCl 2, NaCl and Na 2SO 4, were also determined. Effects of parameters such as concentration of salt solutions and trans-membrane pressure on retention rates of microporous ZrO 2 membranes were studied in detail. Results showed that zirconium n-propoxide derived microporous ZrO 2 membranes exhibited comparatively high retention rates towards divalent ions like Mg 2+ and Ca 2+, while much lower retention rates were observed for mono-valent ion (Na +) in the present study, which are the characteristics of nanofiltration membranes.
KW - Diethanolamine
KW - Microporous membrane
KW - Nanofiltration
KW - Sol-gel
KW - Zirconia
UR - http://www.scopus.com/inward/record.url?scp=84862786501&partnerID=8YFLogxK
U2 - 10.1007/s10971-012-2711-0
DO - 10.1007/s10971-012-2711-0
M3 - 文章
AN - SCOPUS:84862786501
SN - 0928-0707
VL - 62
SP - 208
EP - 216
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
IS - 2
ER -