Preparation of titanium dioxide immobilized on carbon fibers annealed in steam ambient and their photocatalytic properties

Abstract

Composites of titanium dioxide (TiO2) immobilized on carbon fibers (CFs) were synthesized by a two-step process. Acid-treated CFs were dip-coated in a TiO2 sol and then annealed under superheated steam ambient to form TiO2/CF composites. The effects of titanium sol concentration and annealing temperature on the micromorphology and phase structure of the TiO2/CF were investigated by field emission scanning electron microscopy and X-ray diffraction, respectively. The photocatalytic properties of the as-prepared TiO2/CFs were evaluated by photocatalytic degradation of acid orange II under ultraviolet light irradiation. The TiO2/CF composites prepared by superheated steam annealing exhibited a uniform surface morphology and high loading degree. The photocatalytic degradation of acid orange indicated that the TiO2/CF composites exhibited excellent photocatalytic performance and reached up to 98.7% degradation rate after 2.5 h of irradiation.

Preparation of TiO₂Coatings on Carbon Fibers

“…A TiO2 sol-gel solution was prepared using titanium n-butoxide (Ti(C4H9O)4) as a precursor and ethanol as a solvent. The synthesis was carried out according to the following procedure [8][9][10]: Ti(C4H9O)4 was added to a mix of solutions (ethanol (C2H5OH), acetic acid (CH3COOH), acetylacetone (C5H8O2)), and the resulting solution was stirred for 1 hour. Then a mix of water and solvent was slowly added dropwise, and the mix was stirred for another 1 hour.…”

Formation of TiO₂ Coating by the Sol-Gel on Carbon Fibers

“…A sol-gel solution was prepared using Ti(OC4H9)4 as a source of TiO2 and C2H5OH as a solvent. The synthesis was carried out according to the following procedure [14]: solution A, consisting of C2H5OH, CH3COOH, C5H8O2, Ti(OC4H9)4 was added, then the entire solution was stirred for 1 hour. Then solution B (H2O and C2H5OH) is slowly added dropwise.…”

The influence of barrier coating parameters on the strength of metal matrix composites

“…Предварительно углеродная ткань подвергалась термообработке при температуре 400°С в течение 20 минут для удаления с поверхности полимерного аппрета [16]. Процесс получения золь-гель раствора подробно описан в [17]…”