College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, 150090, People's Republic of China.
Environ Sci Pollut Res Int. 2019 Nov;26(33):33847-33855. doi: 10.1007/s11356-018-2569-y. Epub 2018 Jun 23.
Atrazine, one of the most widespread herbicides in the world, is considered as an environmental estrogen and has potential carcinogenicity. In this study, atrazine was degraded on boron-fluorine co-doped TiO nanotube arrays (B, F-TiO NTAs), which had similar morphology with the pristine TiO NTAs. The structure and morphology of TiO nanotube samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-visible diffuse reflectance spectroscopy (DRS). It showed that the decoration of fluorine and boron made both the absorption in the visible region enhanced and the band edge absorption shifted. The efficiency of atrazine degradation by B, F-TiO NTAs through photoelectrocatalysis was investigated by current, solution pH, and electrolyte concentration, respectively. The atrazine removal rate reached 76% through photoelectrocatalytic reaction by B, F-TiO NTAs, which was 46% higher than that under the photocatalysis process. Moreover, the maximum degradation rate was achieved at pH of 6 in 0.01 M of NaSO electrolyte solution under a current of 0.02 A and visible light for 2 h in the presence of B, F-TiO NTAs. These results showed that B, F-TiO NTAs exhibit remarkable photoelectrocatalytic activity in degradation of atrazine.
莠去津是世界上使用最广泛的除草剂之一，被认为是一种环境雌激素，具有潜在的致癌性。在这项研究中，莠去津在掺硼掺氟的 TiO 纳米管阵列（B，F-TiO NTAs）上进行了降解，其形貌与原始 TiO NTAs 相似。TiO 纳米管样品的结构和形貌通过扫描电子显微镜（SEM）、X 射线衍射（XRD）和紫外-可见漫反射光谱（DRS）进行了表征。结果表明，氟和硼的掺杂不仅使可见光区的吸收增强，而且带边吸收也发生了位移。通过电流、溶液 pH 值和电解质浓度分别研究了 B、F-TiO NTAs 通过光电催化对莠去津的降解效率。B、F-TiO NTAs 通过光电催化反应使莠去津的去除率达到 76%，比光催化过程中的去除率高 46%。此外，在 0.01 M 的 NaSO 电解质溶液中，在 0.02 A 的电流和可见光下，pH 值为 6 时，最大降解率在 2 h 内达到。这些结果表明，B、F-TiO NTAs 在降解莠去津方面表现出显著的光电催化活性。
