High photocatalytic activity of V-doped SrTiO3 porous nanofibers produced from a combined electrospinning and thermal diffusion process

Abstract

In this letter, we report a novel V-doped SrTiO 3 photocatalyst synthesized via electrospinning followed by a thermal diffusion process at low temperature. The morphological and crystalline structural investigations reveal not only that the V-doped SrTiO 3 photocatalyst possesses a uniform, porous, fibrous structure, but also that some V 5+ ions are introduced into the SrTiO 3 lattice. The photocatalytic capability of V-doped SrTiO 3 porous nanofibers was evaluated through photodegrading methyl orange (MO) in aqueous solution under artificial UV-vis light. The results indicated that V-doped SrTiO 3 porous nanofibers have excellent catalytic efficiency. Furthermore, the excellent catalytic activity was maintained even after five cycle tests, indicating that they have outstanding photocatalytic endurance. It is suggested that the excellent photocatalytic performance of doped SrTiO 3 nanofibers is possibly attributed to the V 5+ ion doping increasing the light utilization as well as to the outstanding porous features, the excellent component and structure stability.

Photocatalytic Degradation and Hydrogen Production of TiO2/Carbon Fiber Composite Using Bast as a Carbon Fiber Source

“…The photocatalytic activities were evaluated by photodegradation of RhB molecules. The procedures had been reported in the previous works [16][17][18]. 0.2 g TiO 2 /carbon fiber composite was dispersed into 100 ml RhB solution (10 mg/L).…”

Multisite occupation of divalent dopants in barium and strontium titanates

“…Inclusion of V 5+ on the ST lattice structure increases the lattice parameters [14], but this is not reliable with the 5 + formal charge. The ionic radius of V 5+ in a VI coordination number is 0.54 Å, which is smaller than that of the Ti 4+ (0.61 Å) and Sr 2+ (1.18 Å) ions.…”

“…Both compounds have been employed in photocatalytic applications related to solar cells for producing renewable green energy due to their small band gap energies at room temperature [11]. In order to improve the performance of the compounds used in this field, foreign cations have often been used as dopants to modify the structural and electronic properties, and by shifting the absorption of ultraviolet light to the visible range [12][13][14][15].…”