Chandra Soumen, Chowdhuri Angshuman Ray, Mahto Triveni Kumar, Sahu Sumanta Kumar
J Nanosci Nanotechnol. 2017 Feb;17(2):1116-124. doi: 10.1166/jnn.2017.12580.
A facile method for the synthesis of porous magnetic nanoparticles (Fe₃O4@Fe₂O₃) embedded with carbon dots (CDs) are demonstrated for photocatalysis study. Here, a simple, low-cost and green method is developed to synthesize CDs from natural source. The synthesized carbon dots are highly water soluble and monodisperse with particle size 2–5 nm. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, UV-Vis absorption spectroscopy, BET surface area were employed to investigate the crystal structure, morphology, surface groups, optical properties, surface area of the synthesized nanocomposites. The photocatalytic performance of the nanocomposites was analyzed for the degradation of methylene blue under visible light and exhibited higher photocatalytic activity compared to Fe₂O₃ nanoparticles. Here the crucial role of CDs has been illustrated for the enhancement of photocatalytic activity.
展示了一种用于合成嵌入碳点（CDs）的多孔磁性纳米粒子（Fe₃O₄@Fe₂O₃）的简便方法，用于光催化研究。在此，开发了一种简单、低成本且绿色的方法从天然来源合成碳点。合成的碳点具有高度水溶性且单分散，粒径为2 - 5纳米。采用X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）、透射电子显微镜（TEM）、傅里叶变换红外光谱（FTIR）、拉曼光谱、紫外-可见吸收光谱、BET表面积来研究合成的纳米复合材料的晶体结构、形态、表面基团、光学性质、表面积。分析了纳米复合材料在可见光下对亚甲基蓝降解的光催化性能，与Fe₂O₃纳米粒子相比表现出更高的光催化活性。在此说明了碳点在增强光催化活性方面的关键作用。
