Building and Construction Techniques Engineering Department, Al-Mustaqbal University College, 51001, Hillah, Babylon, Iraq.
Environmental Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq.
J Environ Manage. 2024 Jun;362:121347. doi: 10.1016/j.jenvman.2024.121347. Epub 2024 Jun 4.
The traditional homogenous and heterogenous Fenton reactions have frequently been restrained by the lower production of Fe ions, which significantly obstructs the generation of hydroxyl radicals from the decomposition of HO. Thus, we introduce novel photo-Fenton-assisted plasmonic heterojunctions by immobilizing FeO and Bi nanoparticles onto 3D SbO via co-precipitation and solvothermal approaches. The ternary SbO/FeO/Bi composites offered boosted photo-Fenton behavior with a metronidazole (MNZ) oxidation efficiency of 92% within 60 min. Among all composites, the SbO/FeO/Bi-5% hybrid exhibited an optimum photo-Fenton MNZ reaction constant of 0.03682 min, which is 5.03 and 2.39 times higher than pure SbO and SbO/FeO, respectively. The upgraded oxidation activity was connected to the complementary outcomes between the photo-Fenton behavior of SbO/FeO and the plasmonic effect of Bi NPs. The regular assembly of FeO and Bi NPs enhances the surface area and stability of SbO/FeO/Bi. Moreover, the limited absorption spectra of SbO were extended into solar radiation by the Fe defect of FeO NPs and the surface plasmon resonance (SPR) effect of Bi NPs. The photo-Fenton mechanism suggests that the co-existence of FeO/Bi NPs acts as electron acceptor/donor, respectively, which reduces recombination losses, prolongs the lifetime of photocarriers, and produces more reactive species, stimulating the overall photo-Fenton reactions. On the other hand, the photo-Fenton activity of MNZ antibiotics was optimized under different experimental conditions, including catalyst loading, solution pH, initial MNZ concentrations, anions, and real water environments. Besides, the trapping outcomes verified the vital participation of OH, h, and O in the MNZ destruction over SbO/FeO/Bi-5%. In summary, this work excites novel perspectives in developing boosted photosystems through integrating the photocatalysis power with both Fenton reactions and the SPR effects of plasmonic materials.
传统的均相和非均相芬顿反应常常受到 Fe 离子生成率较低的限制，这极大地阻碍了 HO 的分解产生羟基自由基。因此，我们通过共沉淀和溶剂热法将 FeO 和 Bi 纳米颗粒固定在 3D SbO 上来引入新型的光芬顿辅助等离子体异质结。三元 SbO/FeO/Bi 复合材料在 60 分钟内提供了增强的光芬顿行为，对甲硝唑（MNZ）的氧化效率达到 92%。在所有复合材料中，SbO/FeO/Bi-5% 杂化体表现出最佳的光芬顿 MNZ 反应常数 0.03682 min，分别比纯 SbO 和 SbO/FeO 高 5.03 和 2.39 倍。这种增强的氧化活性与 SbO/FeO 的光芬顿行为和 Bi NPs 的等离子体效应之间的互补结果有关。FeO 和 Bi NPs 的规则组装提高了 SbO/FeO/Bi 的比表面积和稳定性。此外，FeO NPs 的 Fe 缺陷和 Bi NPs 的表面等离子体共振（SPR）效应将 SbO 的有限吸收光谱扩展到太阳辐射中。光芬顿机制表明，FeO/Bi NPs 的共存分别充当电子受体/供体，从而减少了复合损失，延长了光载流子的寿命，并产生了更多的活性物质，从而刺激了整个光芬顿反应。另一方面，在不同的实验条件下优化了 MNZ 抗生素的光芬顿活性，包括催化剂负载量、溶液 pH 值、初始 MNZ 浓度、阴离子和实际水环境。此外，捕获结果验证了 OH、h 和 O 在 SbO/FeO/Bi-5% 上破坏 MNZ 中的重要参与。总之，这项工作通过将光催化能力与芬顿反应和等离子体材料的 SPR 效应相结合，为开发增强型光系统提供了新的思路。
