摘要
通过改进的Hummers法和超声共沉淀法分别制备了氧化石墨烯(GO)和Fe_(3)O_(4)纳米粒子,经过羟基化、氨基化对Fe_(3)O_(4)纳米粒子进行改性,最后通过酰胺反应使GO和Fe_(3)O_(4)-NH_(2)纳米粒子发生反应得到磁性氧化石墨烯纳米材料(MGO).研究了Fe_(3)O_(4)纳米粒子超声共沉淀温度和Fe_(3)O_(4)-OH羟基化水解时间对制备的磁性粒子的影响.结果表明:当反应温度为30℃时制备出的Fe_(3)O_(4)纳米粒子粒径较小,为7~13nm,形状规则性更好;当水解时间为6h时,在Fe_(3)O_(4)粒子表面包覆SiO_(2)同时羟基化,结果显示具有更好的包覆完整度及合适的包覆层厚度;在活化剂EDC和NHS存在的条件下,氧化石墨烯和改性后的Fe_(3)O_(4)纳米粒子发生酰胺反应,成功制备出MGO.
Graphene oxide and Fe3O4 nanoparticles were prepared by improved Hummers method and ultrasonic coprecipitation method respectively. Magnetic graphene oxide(MGO)nanoparticles were obtained by amide reaction between GO and modified Fe3O4-NH2 nanoparticles which were modified by hydroxylation and amination. The effects of ultrasonic coprecipitation temperature and hydrolysis time of hydroxylation were studied. The results showed that the particle size and shape regularity of Fe3O4nanoparticles were smaller(7-13 nm) and better at 30 ℃. When the hydrolysis time is 6 h, the surface of Fe3O4 nanoparticles were coated with SiO2 and hydroxylated at the same time which result better coating integrity and appropriate thickness. MGO was successfully prepared by amidation reaction between GO and modified Fe3O4 in the presence of EDC and NHS.
作者
张鑫韬
徐瑾
王金玉
何燕
ZHANG Xintao;XU Jin;WANG Jinyu;HE Yan(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)
出处
《青岛科技大学学报（自然科学版）》
CAS
2021年第5期41-47,共7页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
国家自然科学基金项目(51676103).
