Method for preparing hollow ferroferric oxide nanoparticles

The invention discloses a method for preparing hollow ferroferric oxide nanoparticles. The method comprises the following specific steps: adding deionized water and a cinnamon extract in a certain volume ratio into a three-neck flask at room temperature, and carrying out ultrasonic dispersion and uniform mixing; after uniformly mixing, putting an iron source and the mixture into a hydrothermal kettle together, and reacting for a period of time at a certain temperature until the reaction is complete; and pouring out a product, carrying out magnetic separation, alternately cleaning the product obtained by magnetic separation with deionized water and ethanol for three to four times, carrying out suction filtration, preparing a suction filtration product and deionized water into a suspension, carrying out spray drying, and collecting a dried product to obtain the ferroferric oxide nano-particles. 本发明公开了一种制备空心四氧化三铁纳米颗粒的方法。具体步骤为：在室温下往三口烧瓶内加入一定体积比的去离子水和桂皮提取物，超声分散混合均匀；混合均匀后，将铁源与混合物一同放入水热釜，在一定温度下反应一段时间，等待反应完全；倒出产物进行磁性