Department of Environmental Science, School of Tropical Medicine and Laboratory Medicine, Hainan Medical University, Haikou, 571199, People's Republic of China.
Environ Sci Pollut Res Int. 2022 Oct;29(47):71688-71695. doi: 10.1007/s11356-022-20700-5. Epub 2022 May 23.
Titanium-based nanomaterials co-doped with terbium (Tb) and sulfur (S) were synthesized by sol-gel method via a facile step. Physicochemical properties of the resulting composites were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), X-ray photo-electron spectroscopy (XPS) and UV-Vis diffused reflectance spectroscopy (DRS). Methylene blue (MB) was used as a degradation target for evaluating the photocatalytic performance. The factors which influence the photocatalytic activity were investigated, including calcined temperatures and S doping amount. Tb, S (2 wt%) co-doped TiO composite calcined at 500 °C exhibited the highest photocatalytic activity with a degradation rate of 72.4% in 3 h. The reaction constant was 0.11529, 0.26025, 0.35038 and 0.41462 h for undoped TiO, Tb-doped TiO, S-doped TiO and Tb, S co-doped TiO, respectively. Importantly, the synergistic effect of terbium and sulfur dopants was profoundly discussed. Furthermore, recycling tests and acute toxicity experiments were carried out to confirm the reusability and biosafety of Tb, S co-doped TiO.
采用溶胶-凝胶法，通过简便的步骤合成了共掺铽（Tb）和硫（S）的钛基纳米材料。采用 X 射线衍射（XRD）、扫描电子显微镜（SEM）、X 射线光电子能谱（XPS）和紫外-可见漫反射光谱（DRS）对所得复合材料的物理化学性质进行了表征。亚甲基蓝（MB）被用作评估光催化性能的降解目标。研究了影响光催化活性的因素，包括煅烧温度和 S 掺杂量。在 500°C 下煅烧的掺铽（2 wt%）和硫（S）的 TiO 复合材料表现出最高的光催化活性，在 3 h 内降解率为 72.4%。未掺杂的 TiO、Tb 掺杂的 TiO、S 掺杂的 TiO 和 Tb、S 共掺杂的 TiO 的反应常数分别为 0.11529、0.26025、0.35038 和 0.41462 h。重要的是，深入讨论了铽和硫掺杂剂的协同效应。此外，还进行了回收测试和急性毒性实验，以确认 Tb、S 共掺杂 TiO 的可重复使用性和生物安全性。
