Abstract
S-doped anatase TiO2 nanoparticles were successfully synthesized by hydrothermal method using Cu–Ti amorphous alloy as precursor. The X-ray photoelectron spectroscopy (XPS) and Energy-Dispersive Spectrum (EDS) results confirm that the S element exists in anatase as SO42−. Remarkably, the severe lattice distortions occur in the S–TiO2 sample. With the calcination at 600 °C, the content of sulfur in the sample decreased obviously. The UV–Vis diffuse reflectance spectroscopy (DRS) result shows that the as-prepared sample without calcination has a reduced value of band-gap energy (2.90 eV) compared with calcined sample (2.95 eV) and pure anatase TiO2 (3.20 eV). Moreover, the photocatalytic activities of the samples were assessed by degradation of rhodamine B (RhB, 10 mg/L) under the ultraviolet (UV) light irradiation. The as-fabricated TiO2 without calcination shows the best photocatalytic degradation capability. The concentration of RhB decreased by 97.2% in 6 min under the irradiation of UV light. The kinetic value was evaluated to be 0.602 min−1.
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