Abstract
Our porous V2O5/TiO2 nanoheterostructure films (with a Ti/V atomic ratio of 1:1) were fabricated via a single-step sparking method using a strong magnetic field (0.5 T) without annealing requirement for the first time. We found that the magnetic flux arrangement has effect on film crystallization, unique morphology, large specific surface area, and surprisingly controllable phase structure of the films. An amorphous TV film was transformed to the TiO2 (anatase/rutile) phase (for TVN) and V2O5–VO2 mixed-phase (for TVH) without destroying the mesopores from an annealing process. Moreover, the TVH sample able to improve the degradation rate up to 270% compared with pre-annealed TV films and up to 30% with post-annealed (400 °C) TVA films. In this paper, the influence of magnetic flux arrangement on structural, morphological, optical, and photocatalytic properties of prepared sample have been investigated and reported.
Highlights
IntroductionOur porous V2O5/TiO2 nanoheterostructure films (with a Ti/V atomic ratio of 1:1) were fabricated via a single-step sparking method using a strong magnetic field (0.5 T) without annealing requirement for the first time
Our porous V2O5/TiO2 nanoheterostructure films were fabricated via a single-step sparking method using a strong magnetic field (0.5 T) without annealing requirement for the first time
We found that heterostructures of T iO2 and other oxides, such as C u2O, WO3, V2O5, ZnO, S iO2, MoS2, Fe3O4 and S nO27–11 to form the semiconductor coupling are believed to overcome the facile recombination of e−/h+ pairs, which is a promising method to optimize photocatalytic performance and visible-light utilization
Summary
Our porous V2O5/TiO2 nanoheterostructure films (with a Ti/V atomic ratio of 1:1) were fabricated via a single-step sparking method using a strong magnetic field (0.5 T) without annealing requirement for the first time. Post-annealed process was required for films crystallization, oxidation, and strong interaction between nanoparticles that limits the application for large-scale manufacturing with simplicity and cost-effectiveness. That is challenging to control the direction of nanoparticles to improve deposition rate, uniformity, and morphology of prepared films. We focused on magnetic fields effect that is highly promising to increase deposition rate and improve film alignment. It promotes film crystallization as a substitute of annealing process
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