Choi Bo-Kyung, Choi Woong-Ki, Park Soo-Jin, Seo Min-Kang
Extreme Materials Research Division, Korea Institute of Carbon Convergence Technology, Jeonju, 54853, South Korea.
Department of Chemistry, Inha University, Incheon, 22212, South Korea.
J Nanosci Nanotechnol. 2018 Sep 1;18(9):6075-6080. doi: 10.1166/jnn.2018.15616.
In this study, we report Ag-TiO2/graphene oxide (GO) nanocomposites prepared by a simple one-pot synthesis using TiO2, AgNO3, and N-doped graphene (NDG). The NDG was synthesized using a microwave-assisted hydrothermal (MHT) method as a function of MHT time. The morphology and structure of Ag-TiO2/GO nanocomposites were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Raman, and Fourier-transform infrared spectroscopy (FTIR). The photocatalytic activity of Ag-TiO2/GO nanocomposites in visible light was explored using the degradation, of methylene blue (MB) dye under the ultraviolet (UV) light. The result showed that Ag-TiO2/GO-3 was very efficient for the degradation of MB with nitrogen doping time. The degradation efficiency of the photocatalytic nanoparticles after 6 h of irradiation was about 80%. Increasing the N-doping time increased their hydrophilicity, thereby improving the photocatalytic performance of Ag-TiO2/GO nanocomposites.
在本研究中，我们报道了通过使用TiO₂、AgNO₃和N掺杂石墨烯（NDG）的简单一锅法合成制备的Ag-TiO₂/氧化石墨烯（GO）纳米复合材料。NDG是使用微波辅助水热（MHT）法作为MHT时间的函数合成的。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）、拉曼光谱和傅里叶变换红外光谱（FTIR）对Ag-TiO₂/GO纳米复合材料的形态和结构进行了表征。利用紫外（UV）光下亚甲基蓝（MB）染料的降解来探究Ag-TiO₂/GO纳米复合材料在可见光下的光催化活性。结果表明，Ag-TiO₂/GO-3在氮掺杂时间下对MB的降解非常有效。照射6小时后光催化纳米颗粒的降解效率约为80%。增加N掺杂时间提高了它们的亲水性，从而改善了Ag-TiO₂/GO纳米复合材料的光催化性能。
