Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P.O. Box. 87317-51167, Islamic Republic of Iran.
Department of Chemistry, Kosar University of Bojnord, Bojnord, Islamic Republic of Iran.
J Colloid Interface Sci. 2018 Mar 15;514:723-732. doi: 10.1016/j.jcis.2017.12.083. Epub 2017 Dec 29.
The sol-gel auto-combustion technique is an effective method for the synthesis of the composites. In this research for the first time, CoTiO/CoFeO nanocomposites are successfully synthesized via a new sol-gel auto-combustion technique. The glucose, maltose and starch are used as fuel, capping and reducing agents, also the optimal reducing agent is chosen. The effects of quantity of reducing agent, molar ratio of Ti:Co, calcination temperature and time on the morphology, particle size, magnetic property, purity and phase of the nanocomposites are investigated. XRD patterns show formation of CoTiO/CoFeO spherical nanoparticles with nearly evenly distribution, when the molar ratio of Co/Ti is 1:1. EDS analysis confirm results of XRD. The magnetic behavior of the nanocomposites is studied by VSM. The nanocomposites exhibit a high coercivity at room temperature.
溶胶-凝胶自燃烧技术是合成复合材料的一种有效方法。在这项研究中，首次通过一种新的溶胶-凝胶自燃烧技术成功合成了 CoTiO/CoFeO 纳米复合材料。葡萄糖、麦芽糖和淀粉用作燃料、封端剂和还原剂，并选择了最佳还原剂。考察了还原剂用量、Ti:Co 摩尔比、煅烧温度和时间对纳米复合材料的形貌、粒径、磁性、纯度和相的影响。XRD 图谱显示，当 Co/Ti 摩尔比为 1:1 时，形成了具有近乎均匀分布的 CoTiO/CoFeO 球形纳米粒子。EDS 分析证实了 XRD 的结果。通过 VSM 研究了纳米复合材料的磁性能。纳米复合材料在室温下表现出高矫顽力。
