Highly enhanced degradation of dye with well-dispersed TiO2 nanoparticles under visible irradiation

TiO2 nanoparticles were prepared through a facile flame method. The samples were characterized by means of X-ray diffraction, transmission electron microscopy, zeta potential measurement and transmittance spectrum. Compared with TiO2 P-25, smaller particle size, less agglomeration and well dispersion are shown for the prepared TiO2 particles. The photosensitized catalytic activity of as-prepared TiO2 was investigated upon its degradation of Rhodamine B under visible light irradiation. It is found that the optical characteristics of TiO2 have great influence on the photosensitized catalytic activity due to its crystalline forms, smaller size, higher surface area and well dispersion.