Universidad Juárez Autónoma de Tabasco, Centro de Investigación de Ciencia y Tecnología Aplicada de Tabasco (CICTAT), DACB, Laboratorio de Nanomateriales Catalíticos Aplicados al Desarrollo de Fuentes de Energía y Remediación Ambiental, Km.1 carretera Cunduacán-Jalpa de Méndez, C.P. 86690, Cunduacán, Tabasco, Mexico.
Centro de Investigación en Materiales Avanzados, CIMAV. Av. Miguel de Cervantes 120. Complejo Industrial, Chihuahua, C.P. 31109, Mexico.
Chemosphere. 2020 Jun;249:126497. doi: 10.1016/j.chemosphere.2020.126497. Epub 2020 Mar 14.
According to the search in the state of the art, no antecedents were found in which photocatalytic degradation of 17α-methyltestosterone (MT) hormone has been carried out using doped-TiO. Nor have the transformation products formed during the heterogeneous photocatalysis (FH) been identified. Therefore, in this study we analyzed the photocatalytic degradation of the MT in aqueous solution, using doped TiO with Sm or Gd at 0.3 and 0.5 %wt. Thermal treatment temperature (500 °C and 800 °C) and MT (20 mgL) mineralization were also studied. All photocatalysts were synthesized using the sol-gel method and characterized by X-ray Diffraction (XRD), Specific Surface Area (BET), Ultraviolet-visible Spectroscopy (UV-vis), High-Resolution Transmission Electron Microscope/Energy-Dispersive X-ray analysis (HRTEM/EDS) and, X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL). MT mineralization was followed by a total organic carbon analyzer (TOC). The route of the photocatalytic mineralization of the hormone was obtained from the analysis of intermediate compounds determined by high performance liquid chromatography coupled to mass spectrometry (LC-TOF-MS). The results showed that TM and its transformation products were not degraded by photolysis. However, the degree of mineralization of the hormone was greater when the photocatalytic process was used. The photocatalytic efficiency was related to the dopant concentration, dopant type and thermal treatment. Therefore, Sm (0.3%)/TiO calcined at 500 °C showed the best performance for photocatalytic mineralization of MT.
根据文献检索，尚未发现使用掺杂 TiO 光催化降解 17α-甲基睾丸酮（MT）激素的先例，也未鉴定出非均相光催化（FH）过程中形成的转化产物。因此，在这项研究中，我们使用掺杂 Sm 或 Gd 的 TiO（浓度分别为 0.3%和 0.5%wt），在水溶液中分析了 MT 的光催化降解。还研究了热处理温度（500°C 和 800°C）和 MT（20mgL）矿化。所有光催化剂均采用溶胶-凝胶法合成，并通过 X 射线衍射（XRD）、比表面积（BET）、紫外可见光谱（UV-vis）、高分辨率透射电子显微镜/能量色散 X 射线分析（HRTEM/EDS）和 X 射线光电子能谱（XPS）进行了表征，并进行了光致发光（PL）分析。通过总有机碳分析仪（TOC）监测 MT 的矿化情况。通过高效液相色谱-飞行时间质谱联用仪（LC-TOF-MS）测定的中间化合物分析，得到了激素光催化矿化的途径。结果表明，TM 及其转化产物不能通过光解降解。然而，当使用光催化过程时，激素的矿化程度更大。光催化效率与掺杂浓度、掺杂类型和热处理有关。因此，在 500°C 下煅烧的 Sm（0.3%）/TiO 表现出 MT 光催化矿化的最佳性能。
