Chemical Engineering Department, Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran.
Department of Gas Engineering, Ahvaz Faculty of Petroleum, Petroleum University of Technology, Ahvaz, Iran.
Sci Rep. 2021 Dec 17;11(1):24177. doi: 10.1038/s41598-021-03492-5.
Various nanocomposites of TiO-ZnO, TiO-ZnO/CS, and TiO-ZnO/CS-Gr with different molar ratios were synthesized by sol-gel and ultrasound-assisted methods and utilized under UV irradiation to enhance the photocatalytic degradation of tetracycline. Characterization of prepared materials were carried out by XRD, FT-IR, FE-SEM, EDX and BET techniques. The TiO-ZnO with the 1:1 molar ratio supported with 1:2 weight ratio CS-Gr (T1‒Z1/CS1‒Gr2 sample) appeared as the most effective material at the optimized operational conditions including the tetracycline concentration of 20 mg/L, pH = 4, catalyst dosage of 0.5 g/L, and 3 h of irradiation time. As expected, the graphene had a significant effect in improving degradation results. The detailed performances of the T1‒Z1/CS1‒Gr2 were compared with ternary nanocomposites from EDX and BET results as well as from the degradation viewpoint. This novel photocatalyst can be effective in actual pharmaceutical wastewater treatment considering the applied operational parameters.
采用溶胶-凝胶和超声辅助法合成了不同摩尔比的 TiO-ZnO、TiO-ZnO/CS 和 TiO-ZnO/CS-Gr 纳米复合材料，并在紫外光照射下用于增强四环素的光催化降解。采用 XRD、FT-IR、FE-SEM、EDX 和 BET 技术对制备的材料进行了表征。在优化的操作条件下，包括四环素浓度为 20mg/L、pH=4、催化剂用量为 0.5g/L 和 3h 的照射时间，TiO-ZnO 与 1:2 重量比 CS-Gr（T1-Z1/CS1-Gr2 样品）的 1:1 摩尔比支撑物表现出最有效的材料。正如预期的那样，石墨烯在提高降解效果方面具有重要作用。通过 EDX 和 BET 结果以及降解观点比较了 T1-Z1/CS1-Gr2 的详细性能。考虑到应用的操作参数，这种新型光催化剂可有效用于实际医药废水处理。
