Pant Bishweshwar, Park Mira, Lee Joong Hee, Kim Hak-Yong, Park Soo-Jin
Department of Chemistry, Inha University, 100 Inharo, Incheon 402-751, Republic of Korea.
Department of Organic Materials and Fiber Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea.
J Colloid Interface Sci. 2017 Jun 15;496:343-352. doi: 10.1016/j.jcis.2017.02.012. Epub 2017 Feb 10.
Development of photocatalytic materials with magnetic and antibacterial properties is highly desirable in wastewater treatment. In this study, a novel magnetically separable silver-iron oxide nanoparticles (Ag-FeO NPs) decorated graphitic carbon nitride (g-CN) nanocomposite via hydrothermal treatment has been presented for the multifaceted applications. The physiochemical properties of the as-synthesized ternary nanocomposite were characterized by the field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) studies. The experimental results showed that loading of Ag on FeO/g-CN nanocomposite significantly improved the catalytic activity of the composite material in terms of photocatalytic degradation of methylene blue (Mdestruction of Escherichia coli (E. coli) bacteria. More importantly, the as-synthesized silver-iron oxide nanoparticles decorated graphitic carbon nitride (Ag-FeO/g-CN) nanocomposite catalyst could be recovered by an applied external magnet and reused without the loss of photocatalytic activity. The obtained results showed that the synthesized material has potential as an economically friendly photocatalyst for environmental and energy applications.
开发具有磁性和抗菌性能的光催化材料在废水处理中具有很高的需求。在本研究中，通过水热法制备了一种新型的磁分离银 - 氧化铁纳米颗粒（Ag-FeO NPs）修饰的石墨相氮化碳（g-CN）纳米复合材料，用于多方面应用。通过场发射扫描电子显微镜（FE-SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、X射线光电子能谱（XPS）和光致发光（PL）研究对合成的三元纳米复合材料的理化性质进行了表征。实验结果表明，在FeO/g-CN纳米复合材料上负载Ag显著提高了复合材料对亚甲基蓝（MB）的光催化降解活性以及对大肠杆菌（E. coli）的抗菌活性。更重要的是，合成的银 - 氧化铁纳米颗粒修饰的石墨相氮化碳（Ag-FeO/g-CN）纳米复合催化剂可以通过外加磁场回收并重复使用，且不会损失光催化活性。所得结果表明，合成的材料作为一种经济友好型光催化剂在环境和能源应用方面具有潜力。
