Kostyukhin Egor M, Nissenbaum Vera D, Abkhalimov Evgeny V, Kustov Alexander L, Ershov Boris G, Kustov Leonid M
Laboratory of Development and Study of Polyfunctional Catalysts, N.D. Zelinsky Institute of Organic Chemistry RAS, 47 Leninsky prosp, Moscow 119991, Russia.
Laboratory of Nanochemistry and Ecology, National University of Science and Technology MISiS, 4 Leninsky prosp., Moscow 119049, Russia.
Nanomaterials (Basel). 2020 Aug 8;10(8):1558. doi: 10.3390/nano10081558.
Nowadays, there is a demand in the production of nontoxic multifunctional magnetic materials possessing both high colloidal stability in water solutions and high magnetization. In this work, a series of water-dispersible natural humate-polyanion coated superparamagnetic magnetite nanoparticles has been synthesized via microwave-assisted synthesis without the use of inert atmosphere. An impact of a biocompatible humate-anion as a coating agent on the structural and physical properties of nanoparticles has been established. The injection of humate-polyanion at various synthesis stages leads to differences in the physical properties of the obtained nanomaterials. Depending on the synthesis protocol, nanoparticles are characterized by improved monodispersity, smaller crystallite and grain size (up to 8.2 nm), a shift in the point of zero charge (6.4 pH), enhanced colloidal stability in model solutions, and enhanced magnetization (80 emu g).
如今，对于生产在水溶液中具有高胶体稳定性和高磁化强度的无毒多功能磁性材料存在需求。在这项工作中，通过微波辅助合成法，在不使用惰性气氛的情况下合成了一系列水分散性天然腐殖酸盐 - 聚阴离子包覆的超顺磁性磁铁矿纳米颗粒。已确定生物相容性腐殖酸阴离子作为包覆剂对纳米颗粒的结构和物理性质的影响。在不同合成阶段注入腐殖酸盐 - 聚阴离子会导致所得纳米材料物理性质的差异。根据合成方案，纳米颗粒的特点是单分散性提高、微晶和晶粒尺寸更小（可达8.2纳米）、零电荷点偏移（pH值为6.4）、在模型溶液中的胶体稳定性增强以及磁化强度增强（80 emu g）。
