TY - JOUR
T1 - Diatom-Mimicking Ultrahigh-Flux Mesoporous Silica Thin Membrane with Straight-Through Channels for Selective Protein and Nanoparticle Separations
AU - Yang, Jingling
AU - Lin, Geng Sheng
AU - Mou, Chung Yuan
AU - Tung, Kuo Lun
N1 - Funding Information:
This work was supported by National Taiwan University, the Ministry of Science and Technology, Taiwan (104-2221-E-002-176-MY3 and 107-3017-F-002-001), and the “Advanced Research Center of Green Materials Science and Technology” from The Featured Area Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (107L9006). J. Y. was supported by a postdoctoral fellowship from the Ministry of Science and Technology (MOST). We thank Ching-Yen Lin and Ya-Yun Yang at the Instrument Centre of National Taiwan University for assistance with SEM and Chia-Ying Chien and Su-Jen Ji of the Ministry of Science and Technology (National Taiwan University) for assistance with the focused ion beam (FIB) instrument and high-magnification TEM experiments.
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/3/12
Y1 - 2019/3/12
N2 - A nature-inspired mesoporous ultrafiltration membrane with unprecedented permeability and high selectivity for selective protein and nanoparticle separations is reported herein. We describe a diatom-mimicking hierarchically porous membrane that consists of a single-layer mesoporous silica thin film (MSTF) with perpendicular pores supported on top of a macroporous anodic aluminum oxide (AAO) membrane (MSTF¥AAO) for ultrafiltration. The MSTF, with a thickness of ca. 30 nm, uniform vertical straight-through mesoporous channels (pore diameter of 5.9 ± 0.4 nm), superhydrophilicity, and continuous nonbreaking to centimeter range (area of 17.3 cm 2 ), is overlaid on the AAO straight-through membrane, which counterintuitively exhibits both ultrahigh water permeability (1027 ± 20 L m -2 h -1 bar -1 ) and an excellent rejection rate (>99%) for molecules larger than 7 nm. The water permeability result is significantly higher than that of the reported nanosized channeled membranes. A model equation for calculating the theoretical permeability flux of the vertically nanochanneled membrane is established and compared with experimental results.
AB - A nature-inspired mesoporous ultrafiltration membrane with unprecedented permeability and high selectivity for selective protein and nanoparticle separations is reported herein. We describe a diatom-mimicking hierarchically porous membrane that consists of a single-layer mesoporous silica thin film (MSTF) with perpendicular pores supported on top of a macroporous anodic aluminum oxide (AAO) membrane (MSTF¥AAO) for ultrafiltration. The MSTF, with a thickness of ca. 30 nm, uniform vertical straight-through mesoporous channels (pore diameter of 5.9 ± 0.4 nm), superhydrophilicity, and continuous nonbreaking to centimeter range (area of 17.3 cm 2 ), is overlaid on the AAO straight-through membrane, which counterintuitively exhibits both ultrahigh water permeability (1027 ± 20 L m -2 h -1 bar -1 ) and an excellent rejection rate (>99%) for molecules larger than 7 nm. The water permeability result is significantly higher than that of the reported nanosized channeled membranes. A model equation for calculating the theoretical permeability flux of the vertically nanochanneled membrane is established and compared with experimental results.
UR - https://www.scopus.com/pages/publications/85062371465
UR - https://www.scopus.com/pages/publications/85062371465#tab=citedBy
U2 - 10.1021/acs.chemmater.8b05295
DO - 10.1021/acs.chemmater.8b05295
M3 - Article
AN - SCOPUS:85062371465
SN - 0897-4756
VL - 31
SP - 1745
EP - 1751
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 5
ER -