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Vacuum-Treated Brown Mesoporous TiO2 Nanospheres with Tailored Defect Structures for Enhanced Photoresponsive
Yue Gao1, Ting Feng2, Xuan Qi1
1College of Chemical and Materials Engineering, Hainan Vocational University of Science and Technology, Haikou 571126, China.
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TiO2 Nanospheres with a large surface area were synthesized via a hydrothermal reaction using titanium glycolate. The samples were subsequently subjected to different vacuum oven treatment times (2, 4, 6, and 8 h), resulting in Ti3+ self-doping. Comprehensive characterization was performed using transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The synthesized TiO2 Nanospheres exhibited significantly enhanced photocurrent and efficient photocatalytic activity under visible light irradiation, demonstrating their potential for applications in solar-driven water splitting. The results highlight the influence of Ti3+ self-doping on improving the photoactivity and photosensitivity of the material.
