In this review we depict how fibers can be obtained by combining sol-gel and polymer chemistry with extrusion processes acting as an external shaping mode. Thanks to this Integrative Chemistry-based synthetic path, it was possible to organize nano-building blocks such as V2O5 ribbons and ZnO nanorods on a greater length scale yielding highly anisotropic fibers. It has been demonstrated that when aligning a whole population of nano-building block objects along a single main axis, collective properties were obtained, thereby enhancing their sensing, mechanical or photonic properties. This method can be extended toward fiber morphogenesis by using isotropic nanoparticles such as TiO2, and can be scaled-up toward the one-step generation of several hundred meter long fibers with both high surface to volume ratio and high surface roughness. Specifically, when addressing photocatalytic-based VOC pollutant degradation, these TiO2 fibers appear to be outstanding candidates regarding both pollutant degradation and associated mineralization (production of water and carbon dioxide).
Kinadjian, N., Depardieu, M., Hillard, E. A., & Backov, R. (2016, May 1). Extrusion-based Integrative Chemistry: Generation and applications of inorganic fibers. Comptes Rendus Chimie. Elsevier Masson SAS. https://doi.org/10.1016/j.crci.2015.09.012