Novel synthesis of S-doped anatase TiO2 via hydrothermal reaction of Cu–Ti amorphous alloy

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2020, Vol.126 (8), Article 606
• Main Authors: Zhang, Enming, Pan, Ye, Lu, Tao, Zhu, Yin’an, Dai, Weiji
• Format: Article
• Language: English
• Subjects: Amorphous alloys; Anatase; Applied physics; Characterization and Evaluation of Materials; Condensed Matter Physics; Copper; Energy gap; Hydrothermal reactions; Light irradiation; Machines; Manufacturing; Materials science; Metallic glasses; Nanoparticles; Nanotechnology; Optical and Electronic Materials; Photocatalysis; Photodegradation; Photoelectrons; Physics; Physics and Astronomy; Processes; Rhodamine; Roasting; Spectrum analysis; Surfaces and Interfaces; Thin Films; Titanium dioxide; Ultraviolet radiation; X ray photoelectron spectroscopy
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-020-03790-1

S-doped anatase TiO 2 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 SO 4 2− . Remarkably, the severe lattice distortions occur in the S–TiO 2 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 TiO 2 (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 TiO 2 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 .