Photocatalytic properties of CaTi2O5via a facile additive-free aqueous strategy with different pH values

CaTi(2)O(5)was selectively prepared by a solvothermal process without template and surfactant. The phase of the as-prepared samples was determined by X-ray diffraction (XRD). The microstructure was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Results found that pH values had a crucial effect on the crystal phase and shape evolution of the samples. CaTi(2)O(5)sample prepared at pH of 5.2 shows high efficient light harvesting, large surface area and crystallinity. Moreover, CaTi(2)O(5)shuttle-like sample shows good photocatalytic activity against methyl orange due to its longer and thinner shuttle-like morphology and high crystallinity, enhanced light harvesting and large surface area. The photocatalytic rate of CaTi(2)O(5)shuttle-like structure reaches 0.1988 min(-1)for 25-min methyl orange degradation under the ultraviolet light irradiation and displays an excellent photostability with a degradation efficiency of 0.1952 min(-1)after four cycles.

Automated summary

The study revealed that pH values have a crucial effect on the crystal phase and shape evolution of CaTi(2)O(5) samples. The CaTi(2)O(5) sample prepared at pH of 5.2 exhibits efficient light harvesting and excellent crystallinity.