Abstract: A novel method was developed to prepare green rust (GR). Under the pH value close to neutral condition，ferric iron solution was slowly added into the ferrous solution. The pH value was carefully controlled simultaneously through adjusting the addition rate of NaOH solution. TEM photoes demonstrated that the GR obtained by this preparation technology only has the hexagon crystals and does not have acicular shape of iron hydroxide.

摘要： 采用半间歇式滴加合成法成功制取了绿锈。此方法的特点是在pH值接近中性的条件下，将三价铁溶液滴加到亚铁溶液中，同时通过调节NaOH溶液的滴加速度，维持体系pH值恒定。TEM图片显示该制备工艺所得绿锈只有六边形晶貌，没有三价铁氢氧化物针状晶体形成。该方法制备的绿锈可较长时间存在，并且达到纳米级，对纳米级铁氧体产品的制备有十分重要的研究意义。