Preparation, characterization, and evaluation of TiO2-ZrO2 nanofiltration membranes fired at different temperatures
Preparation, characterization, and evaluation of TiO2-ZrO2 nanofiltration membranes fired at different temperatures
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DOI：
10.1016/j.memsci.2018.07.072
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发表时间：
2018-10-15
影响因子：
9.5
通讯作者：
Tsuru, Toshinori
中科院分区：
文献类型：
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作者：
Anisah, Sofiatun;Puthai, Waravut;Tsuru, Toshinori
采用溶胶-凝胶法成功制备了TiO 2-ZrO 2纳滤膜。将摩尔比为5/5的两种类型的TiO 2-ZrO 2溶胶（聚合物溶胶和胶体溶胶）涂覆到α-Al 2 O 3圆柱形多孔载体上，然后在不同温度下烧制。该膜的结构在高达500摄氏度的烧制温度下是无定形的。的N-2渗透和水渗透的测量表明，所制备的膜的平均孔径，N2渗透，和水渗透（L-p）的值随焙烧温度的增加而增加，并观察到急剧增加的温度从非晶相到结晶相的转变。对于在200-600 ℃焙烧的膜，平均孔径和N2渗透率分别为0.5-0.8 nm和0.14-0.54 × 10（-5）mol/（m（2）s Pa）;纳滤性能分别显示出200-810 g/mol的截留分子量（MWCO）和2-12 × 10（-12）m（3）/（m（2）s Pa）的L-p。在本研究中，通过使用不同尺寸的溶胶和通过操纵烧制温度成功地控制膜的结构和分离性能的值。
TiO2-ZrO2 nanofiltration membranes were successfully prepared using a sol-gel method. Two types of TiO2-ZrO2 sols (polymeric and colloidal sols) with molar ratios of 5/5 were coated onto alpha-Al2O3 cylindrical porous supports followed by firing at different temperatures. The structures of the membranes were amorphous up to a firing temperature of 500 degrees C. Measurements of the N-2 permeance and water permeability revealed that values for average pore size, N2 permeance, and water permeability (L-p) of the prepared membranes were increased with increases in the firing temperature, and a drastic increase was observed at the temperature of transformation from an amorphous to a crystalline phase. For the membranes fired at 200-600 degrees C, the average pore size and N2 permeance was 0.5-0.8 nm and 0.14-0.54 x 10(-5) mol/(m(2) s Pa), respectively; nanofiltration performance showed molecular weight cut-offs (MWCOs) of 200-810 g/mol, and L-p of 2-12 x 10(-12) m(3)/(m(2) s Pa), respectively. In the present study, values for the structure and separation performance of the membranes were successfully controlled via the use of different sizes of sols and by manipulating the firing temperature.