College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Tai'an, 271018, Shandong, People's Republic of China.
Future Water Strategy Group, South East Water, 101 Wells Street, Frankston, Melbourne, Victoria, 3199, Australia.
Environ Sci Pollut Res Int. 2020 May;27(13):15103-15112. doi: 10.1007/s11356-020-07827-z. Epub 2020 Feb 17.
In this study, a photocatalyst S-doped WO was successfully synthesized by the hydrothermal method. The prepared undoped and S-doped WO samples were then characterized by XRD, SEM, XPS, and UV-vis DRS. The results showed that the band gap energy of S-doped WO was lower than that of the undoped WO which led to a better absorption of visible light. Furthermore, the results of XPS analysis suggested that the doping with S element resulted in an increase in lattice oxygen vacancies on the surface of S-WO, which could effectively improve the photocatalytic activity. The photocatalytic performance of the S-WO samples were evaluated by the measurement of methylene blue (MB) degradation under visible light irradiation. The experimental results demonstrated that S-doped WO sample exhibited a much better photodegradation performance compared to undoped WO, with the maximum MB removal efficiency of 78.7% for the 5% S-WO sample. Based on the above results, the mechanisms of photodegradation of MB by S-WO were discussed.
在这项研究中，通过水热法成功合成了一种光催化剂 S 掺杂 WO。然后通过 XRD、SEM、XPS 和 UV-vis DRS 对制备的未掺杂和 S 掺杂 WO 样品进行了表征。结果表明，S 掺杂 WO 的带隙能低于未掺杂 WO，导致其对可见光的吸收更好。此外，XPS 分析结果表明，S 元素的掺杂导致 S-WO 表面晶格氧空位增加，这可以有效提高光催化活性。通过测量可见光照射下亚甲基蓝（MB）的降解来评估 S-WO 样品的光催化性能。实验结果表明，与未掺杂 WO 相比，S 掺杂 WO 样品表现出更好的光降解性能，5% S-WO 样品的 MB 去除率最高可达 78.7%。基于上述结果，讨论了 S-WO 光降解 MB 的机制。
