Fabrication of photocatalytic PVA-TiO2 nano-fibrous hybrid membrane using the electro-spinning method
Fabrication of photocatalytic PVA-TiO2 nano-fibrous hybrid membrane using the electro-spinning method
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DOI：
10.1007/s10853-011-5511-y
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发表时间：
2011-09-01
影响因子：
4.5
通讯作者：
Lee, Byong-Taek
中科院分区：
文献类型：
--
作者：
Nguyen Thuy Ba Linh;Lee, Kap-Ho;Lee, Byong-Taek
纳米纤维膜在过滤应用中具有巨大的应用前景。在这项研究中，光催化聚乙烯醇（PVA）/TiO 2复合聚合物膜成功地合成了不同的TiO 2浓度（20，30，40，50%），使用静电纺丝法。优化了静电纺丝的电场强度、针尖距和进料速率等工艺参数。电纺PVA-TiO 2纤维的直径和负载在PVA纳米纤维中的TiO 2纳米颗粒的平均尺寸分别为100 - 150 nm和15 - 30 nm。X射线衍射分析表明，虽然也观察到小的金红石峰的PVA-TiO 2膜的主要晶体结构是的的α型。TiO 2纳米粒子嵌入PVA纤维中，沿纤维方向呈沿着线性分散。随着PVA中TiO 2负载量的增加，拉伸强度也增加，而拉伸应变显着降低。此外，当TiO 2含量从20%增加到50%时，PVA-TiO 2膜的光催化活性增加。
Nano-fiber membranes hold great promise for use in filtration applications. In this study, a photocatalytic polyvinyl alcohol (PVA)/TiO2 composite polymer membrane was successfully synthesized at different TiO2 concentrations (20, 30, 40, and 50%) using the electro-spinning method. The parameters of electro-spinning including electrical field, tip-to-collector distance, and feed rate were optimized for fabrication process. The diameter of the electro-spun PVA-TiO2 fibers and average size of the TiO2 nano-particles loaded in the PVA nano-fibers ranged from 100 to 150 nm and 15 to 30 nm, respectively. X-ray diffraction analysis indicated that the main crystal structure was of the anatase type even though small rutile peaks were also observed for the PVA-TiO2 membrane. TiO2 nano-particles were embedded in the PVA fiber and were dispersed linearly along the fiber direction. As the amount of TiO2 loaded in PVA increased, the tensile strength also increased while the tensile strain significantly decreased. Also, when the TiO2 content was increased from 20 to 50%, the photocatalytic activity of the PVA-TiO2 membranes increased.