One-step synthesis of crystalline anatase TiO_2 nanospindles and investigation on their photocatalytic performance

摘要

Crystalline anatase TiO_2 nanospindles were synthesized via a facile one-step and surfactant-free hydrothermal method without calcination procedure. The product was characterized by XRD, SEM and HRTEM, and the phase, morphology as well as the exposed facets was ascertained. Specific surface area of the as-synthesized TiO_2 nanospindles was calculated based on N_2 adsorption-desorption isotherms. The photocatalytic activities of both the TiO_2 nanospindles and the commercial P25 TiO_2 nanoparticles were examined via the photodegradation of organic dyes. The former sample exhibits a much higher photocatalytic activity and the origin is discussed. In addition, the stability of the as-synthesized TiO_2 photocatalyst was studied through repeated use of the sample.