Panda Lipsa, Pradhan Abanti, Subudhi Enketeswara, Sahoo Rajesh Kumar, Nanda Binita
Department of Chemistry, Faculty of Engineering and Technology (ITER), Siksha 'O' Anusandhan (Deemed to Be) University, Bhubaneswar, 751030, Odisha, India.
Department of Biotechnology, Center of Biotechnology, Siksha 'O' Anusandhan (Deemed to Be) University, Bhubaneswar, 751030, Odisha, India.
Environ Sci Pollut Res Int. 2024 Jan;31(4):5540-5554. doi: 10.1007/s11356-023-31523-3. Epub 2023 Dec 21.
The performance of advanced materials in environmental applications using green energy is the tremendous interest among researchers. The visible light responsive BiFeO (BFO), BiFeO/CuS (BFOC), and Ag-loaded BiFeO/CuS (Ag-BFOC) heterostructures have been synthesized by reflux method followed by hydrothermal and wetness impregnation method. These synthesized composites are well characterized through X-ray diffraction, UV diffuse reflectance spectroscopy, scanning electron microscope, and Fourier transfer infrared spectroscopy techniques. Compared with BFO and BFOC, Ag-BFOC exhibits the highest photocatalytic performance towards the degradation of antibiotics ciprofloxacin (76%) within 120-min time and also showed better antibacterial performance towards gram-negative (Escherichia coli, Klebsiella pneumoniae, and Acinetobacter baumannii) bacteria. Moreover, the novelty of the present work is the addition of CuS on the surface of BiFeO from heterojunction type II and facilitates the electron-hole channelization at the interfaces between BiFeO and CuS. Again, the loading of Ag on BiFeO/CuS helps in shifting the absorption band towards the red end, is eligible to absorb more sunlight due to surface plasmon resonance effect, improves the separation efficiency of photo-generated charge carriers, and enhances the photocatalytic degradation of ciprofloxacin. The antibacterial property of Ag gives a best result towards antimicrobial activity. The prepared composites have proved their durability and stability by four successive cycles and prove the versatility of the composite.
先进材料在利用绿色能源的环境应用中的性能是研究人员极为感兴趣的领域。通过回流法，随后采用水热法和湿浸渍法合成了可见光响应的BiFeO（BFO）、BiFeO/CuS（BFOC）和Ag负载的BiFeO/CuS（Ag-BFOC）异质结构。通过X射线衍射、紫外漫反射光谱、扫描电子显微镜和傅里叶变换红外光谱技术对这些合成的复合材料进行了充分表征。与BFO和BFOC相比，Ag-BFOC在120分钟内对环丙沙星抗生素的降解表现出最高的光催化性能（76%），并且对革兰氏阴性菌（大肠杆菌、肺炎克雷伯菌和鲍曼不动杆菌）也表现出更好的抗菌性能。此外，本工作的新颖之处在于在II型异质结的BiFeO表面添加了CuS，并促进了BiFeO和CuS之间界面处的电子-空穴通道化。再次，在BiFeO/CuS上负载Ag有助于将吸收带向红端移动，由于表面等离子体共振效应能够吸收更多阳光，提高了光生电荷载流子的分离效率，并增强了环丙沙星的光催化降解。Ag的抗菌性能在抗菌活性方面取得了最佳效果。所制备的复合材料通过四个连续循环证明了其耐久性和稳定性，并证明了该复合材料的多功能性。
