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叶酸修饰磁性氧化石墨烯载体的制备、表征及其磁性研究
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| 篇名： | 叶酸修饰磁性氧化石墨烯载体的制备、表征及其磁性研究 |
| TITLE： | |
| 摘要： | 目的：制备叶酸（FA）修饰磁性氧化石墨烯载体（FA-GO-Fe3O4），并对其进行表征和磁性研究。方法：以氧化石墨烯（GO）、六水合三氯化铁、四水合氯化亚铁为原料，采用水热共沉淀法制备磁性氧化石墨烯（GO-Fe3O4），再通过酰胺键与FA连接，得到FA-GO-Fe3O4，采用扫描电镜、红外光谱仪、X射线衍射（XRD）仪和粒度及Zeta电位分析仪分别对GO、GO-Fe3O4和FA-GO-Fe3O4进行表征，并测定其Zeta电位，通过外加磁场作用和磁滞回线考察FA-GO-Fe3O4的磁性。结果：与GO、GO-Fe3O4比较，扫描电镜图和XRD图显示，在FA-GO-Fe3O4合成中破坏了GO的结构，且表面有粒子团附着，15 °～30 °之间有非晶相峰；红外光谱显示，FA-GO-Fe3O4在574 cm－1和1 640 cm－1处有吸收峰，分别属于 Fe-O和—CONH—的特征吸收。GO、GO-Fe3O4和FA-GO-Fe3O4的Zeta电位分别为－24、5.62、－22.7 mV，FA-GO-Fe3O4在外加磁场作用下有明显磁性，在室温、外加正反磁场条件下饱和磁化强度约为20～25 emu/g。结论：本研究所制FA-GO-Fe3O4具有超顺磁性，且稳定性强于GO-Fe3O4。 |
| ABSTRACT： | OBJECTIVE： To prepare Magnetic graphene oxide modified by folic acid （FA-GO-Fe3O4）， and to characterize it and study its magnetism. METHODS： Using graphene oxide （GO）， ferric chloride hexahydrate and ferrous chloride tetrahydrate as raw material， magnetic graphene oxide （GO-Fe3O4） was synthesized by hydrothermal coprecipitation method. FA-GO-Fe3O4 was obtained by linking amido bond to folic acid. GO， GO-Fe3O4 and FA-GO-Fe3O4 were characterized by scanning electron microscopy， infrared spectroscopy， X-ray diffraction （XRD） and particle size and Zeta potential analyzer respectively. Zeta potential was measured. The magnetism of FA-GO-Fe3O4 were investigated by the action of external magnetic field and hysteresis loop. RESULTS： Compared with GO and GO-Fe3O4， scanning electron microscopy and XRD showed that the structure of GO destroyed in the synthesis of FA-GO-Fe3O4， and there were particles attached on the surface， and amorphous phase peaks between 15 ° and 30 °. Infrared spectroscopy showed that FA-GO-Fe3O4 had absorption peaks at 574 cm－1 and 1 640 cm－1， which belonged to the characteristic absorption of Fe-O and —CONH— respectively. Zeta potentials of GO， GO-Fe3O4 and FA-GO-Fe3O4 were －24， 5.62 and －22.7 mV， respectively. FA-GO-Fe3O4 had obvious magnetism under external magnetic field， and its saturation magnetization was about 20-25 emu/g under room temperature and applied positive and negative magnetic fields. CONCLUSIONS： FA-GO-Fe3O4 prepared in this study has superparamagnetism and is more stable than GO-Fe3O4. |
| 期刊： | 2019年第30卷第15期 |
| 作者： | 赵鹏慧，王彦，刘雪颖，王永利，刘家园，王立华 |
| AUTHORS： | ZHAO Penghui，WANG Yan，LIU Xueying，WANG Yongli，LIU Jiayuan，WANG Lihua |
| 关键字： | 氧化石墨烯；叶酸；制备；表征；磁性 |
| KEYWORDS： | Graphene oxide； Folic acid； Preparation； Characterization； Magnetism |
| 阅读数： | 302 次 |
| 本月下载数： | 5 次 |
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