Hierarchical architectures TiO_2: Pollen-inducted synthesis, remarkable crystalline-phase stability, tunable size, and reused photo-catalysis

摘要

TiO_2 with hierarchical architectures, tunable crystalline phase and thermal stability is successfully fabricated on a large scale through a facile hydrolysis process of TiCl_4 combining with inducing of pollen. The structure of the as-prepared TiO_2 is characterized by X-ray diffraction, Raman spectroscopy, infrared spectra, and scanning electron microscopy. The experimental results indicate that different phases (anatase, rutile or mixed crystallite) of T1O_2 can be synthesized by controlling the experimental conditions. The pure phase of rutile or anatase can be obtained at 100 ℃, while the pure phase of anatase can be retained after being annealed at 900 ℃. The hierarchical structures TiO_2 are constitute through self-assembly of nanoparticles or nanorods TiO_2, which exhibit high and reused photo-catalytic properties for degradation of methylene blue.