Preparation of TiO₂ Hollow-Fibers Using Supramolecular Assemblies

Abstract

trans-(1R,2R)-1,2-Cyclohexanedi(11-aminocarbonylundecylpyridinium) hexafluorophosphate (1) was synthesized. The sol−gel polymerization of Ti[OCH(CH3)2]4 using compound 1 as a self-assembled template afforded fibrous TiO2 materials with a “macaroni”-like structure. The unique structure of TiO2 could be created by the formation of a fibrous self-assembled aggregate and electrostatic interaction between anionic titania species and cationic 1 under basic conditions.

Photocatalyst Nanofibers Obtained by Calcination of Organic-Inorganic Hybrids

“…As can be seen from this image, hollow TiO 2 nanofibers (TiO 2 nanotubes: outer diameter, ca.440 nm, inner diameter, ca.270 nm) were formed. The nanotubes obtained are seemed to have a uniform diameter as compared to the diameter range reported by Kobayashi et al (Kobayashi et al, 2000). We determined that a precursor nanofiber with a skin-core structure would be obtained by our method; the skin layer is a PVA-TTIP hybrid, and the core is pure PVA.…”

“…Kobayashi et al reported the preparation of TiO 2 nanotubes using the gelation (self-assembly with a rodlike fibrous structure) of an organogelator (It is not ES.) (Kobayashi et al, 2000(Kobayashi et al, , 2002. The organogelator is a cyclohexane derivative that was specially synthesized by this research group.…”

Photocatalytic degradation of eleven microcystin variants and nodularin by TiO2 coated glass microspheres

“…Photocatalysts can also be deployed as a fixed matrix, usually as a film or in the form of nano tubes/rods. Preparation of these materials, however often requires convoluted and cost-intensive manufacturing processes, and they also have a reduced reactive surface area compared to powder and pelletised materials [11,14]. A novel approach for deploying photocatalysts is annealing the materials to hollow, buoyant glass spheres.…”

Synthesis and Characterization of Ni Doped ZnO Nanoparticles

“…These properties are strongly related to the synthesis processes. Numerous solution techniques, for example, sol-gel, emulsion, colloidal, and aerosol processes, have been used to synthesize a variety of nanoparticles [2][3][4][5][6]. As an alternative approach, the electrochemical route is of considerable interest because of a possibly precise particle size control achieved by adjusting current density or applied potential.…”