Moghanlou Afrasiab Salehi, Molaei Mehdi, Fang Tao
Department of Physics, Faculty of Science, Vali-E-Asr University of Rafsanjan, Rafsanjan, Iran.
Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
J Fluoresc. 2025 Jul;35(7):5847-5859. doi: 10.1007/s10895-024-03982-5. Epub 2024 Oct 3.
In the present study, Rgo/FeO/CdSe as a dark catalyst material was synthesized by a refluxing method. The synthesized magnetic nanocomposites were studied by various analyses such as Fourier transform infrared (FTIR), energy-dispersive X-ray spectroscopy (EDS), field emission scanning electron microscopy (FESEM), X-ray diffractometer (XRD), Raman, Zeta and vibrating sample magnetometer (VSM). Characterization of structural analysis showed that the nanocomposites were successfully synthesized. The absorption spectrum was used to determine the dark catalyst activity of rGO/FeO/CdSe nanocomposite. Analysis of the absorption spectrum showed that the prepared nanocomposites degrade the MB organic dye completely (100%) after 2 min of stirring in the dark, also experimenting with different pH showed that the best performance for the degradation of MB occurs in neutral and alkaline media. The Raman spectrum analysis showed that the FeO/CdSe quantum dots (QDs) were correctly incorporated on the reduced graphene oxide (rGO) nanosheets. Zeta potential analysis showed that rGO/FeO/CdSe has a large amount of negative charge on its surface and the surface charge increased by about 16 mV compared to the FeO/CdSe compound. BET and BJH techniques were used to determine the effective surface area and pore size diameter, BET results to determine the effective surface area showed that by adding graphene to the compound, the specific surface area increased from 42.877 mg to 54.1896 mg. The radical scavenger experiment showed that electrons play an essential role in the degradation process. VSM analysis showed that the prepared nanocomposites have excellent superparamagnetic behavior, this advantage enables the easy collection of nanocatalysts by magnets from wastewater after dye degradation.
在本研究中，通过回流法合成了Rgo/FeO/CdSe作为暗催化剂材料。通过傅里叶变换红外光谱（FTIR）、能量色散X射线光谱（EDS）、场发射扫描电子显微镜（FESEM）、X射线衍射仪（XRD）、拉曼光谱、Zeta电位和振动样品磁强计（VSM）等各种分析方法对合成的磁性纳米复合材料进行了研究。结构分析表征表明纳米复合材料已成功合成。利用吸收光谱来测定rGO/FeO/CdSe纳米复合材料的暗催化剂活性。吸收光谱分析表明，制备的纳米复合材料在黑暗中搅拌2分钟后能完全降解甲基橙有机染料（100%），不同pH值的实验表明，甲基橙降解的最佳性能出现在中性和碱性介质中。拉曼光谱分析表明，FeO/CdSe量子点（QDs）正确地结合在了还原氧化石墨烯（rGO）纳米片上。Zeta电位分析表明，rGO/FeO/CdSe表面带有大量负电荷，与FeO/CdSe化合物相比，表面电荷增加了约16 mV。采用BET和BJH技术测定有效表面积和孔径直径，BET测定有效表面积的结果表明，向化合物中添加石墨烯后，比表面积从42.877 mg增加到54.1896 mg。自由基清除剂实验表明，电子在降解过程中起着至关重要的作用。VSM分析表明，制备的纳米复合材料具有优异的超顺磁性能，这一优势使得在染料降解后能够通过磁铁轻松地从废水中收集纳米催化剂。
