查看文章

This study focused on green-synthesized magnetite/carbon dots nanocomposites (GS-Fe₃O₄/Cdots) utilizing Moringa oleifera leaf extract and watermelon peel waste for rapid degradation of methylene blue (MB) dye. Co-precipitation and hydrothermal method were used to synthesize GS-Fe₃O₄ and Cdots, respectively. In addition, the sonication method was used to link Cdots on Fe₃O₄ surface. X-ray diffraction spectrum of GS-Fe₃O₄/Cdots inform the cubic inverse spinel and has crystallite size in the range of 10.1–7.2 nm. The crystallite size also decreased with the increase of Cdots concentration. The transmission electron microscope showed the most uniform size of nanocomposites at around 13.4 nm. The functional group of Fe-O was detected on the nanocomposites, proof that Fe₃O₄ still exists after fabrication. The presence of C = C, C-O, and C-O-C also indicates the existence of Cdots on the surface of Fe₃ …