General strategy for fabricating thoroughly mesoporous nanofibers
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Materials Science and Engineering Program
KAUST Solar Center (KSC)
Laboratory of Nano Oxides for Sustainable Energy
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AbstractRecently, preparation of mesoporous fibers has attracted extensive attentions because of their unique and broad applications in photocatalysis, optoelectronics, and biomaterials. However, it remains a great challenge to fabricate thoroughly mesoporous nanofibers with high purity and uniformity. Here, we report a general, simple and cost-effective strategy, namely, foaming-assisted electrospinning, for producing mesoporous nanofibers with high purity and enhanced specific surface areas. As a proof of concept, the as-fabricated mesoporous TiO2 fibers exhibit much higher photocatalytic activity and stability than both the conventional solid counterparts and the commercially available P25. The abundant vapors released from the introduced foaming agents are responsible for the creation of pores with uniform spatial distribution in the spun precursor fibers. The present work represents a critically important step in advancing the electrospinning technique for generating mesoporous fibers in a facile and universal manner.
SponsorsThis work was supported by the 973 program (Grant No. 2012CB326407), National Natural Science Foundation of China (NSFC, Grant Nos. 51372122 and 51372123), and Outstanding Innovation Project for Graduate Student in Shanxi Province (Grant No. 20133040). This work was also supported by King Abdullah University of Science and Technology (KAUST).
PublisherAmerican Chemical Society (ACS)