制备羟基铁时，经常采用共沉淀法制备，并且也是一步到位，没有遇到过调节pH两步完成的，建议楼主提供对应的文献，以供交流... 一步制备，是直接向Fe(III)盐溶液中加碱调节pH吗？产物结晶怎么样，是纯相么？50.0 g of analytical grade of Fe(NO3)39H2O was dissolved in half liter of de-ionized water in a 1 L plastic container, which was previously sterilized.The solution was hydrated for 24 h at pH 1.6 with continuous stirring with magnetic stirrer. Then 2.5 M KOH solution was added drop-wise until solution attained a pH of 12. The resulting thick suspension was aged for 5 days in a thermostatic oven at 60°C. The goethite paste was then oven dried at 60°C.文献：Synthesis, characterization and application of goethite mineral as an adsorbentSample Text捕获.PNG，
